Canopy

According to weather forecasts, from February 1st to 6th, Hubei Province will experience the most powerful cold wave of the winter, with low temperatures, rain, snow, and ice. The average temperature across the province is expected to drop by 6°C to 10°C. This severe freezing weather will pose a significant threat to the normal growth of tea plants, particularly young ones. Precautionary measures should be taken to minimize the impact of extreme freezing conditions on tea fields and ensure the production of spring tea next year. Influence of Low-Temperature Freezing Weather on Tea Production Severe freezing weather poses a significant threat to the normal growth of tea plants, especially young ones, potentially leading to reduced yields, decreased quality, and even plant death. Measures to Prevent Frost Damage in Tea Plants 1. Covering for Frost Protection For mature tea plants in high-altitude areas, non-woven fabrics, ground films, or shade nets can be used to directly cover the canopy, with better results achieved by erecting a shelter 10cm to 20cm above the canopy. Covering with rice straw or crop stalks provides even better protection against extreme cold. Covering materials should be removed when temperatures rise. 2. Spraying Anti-Freeze Agents For mature tea…

With the drop in temperature, the growth of the above-ground parts of tea trees slows down gradually while that of the underground parts remains relatively active. Applying base fertilizer in autumn can improve the efficiency of fertilizer use by the tea trees and contribute to enhancing the quality and yield of spring tea the following year. Therefore, it is essential to apply base fertilizers scientifically to tea trees in autumn. I. Principles of Fertilization 1. Organic and chemical fertilizers should be used in combination, with organic fertilizers replacing part of the chemical fertilizers, and base fertilizers should be applied deeply; 2. Maintain a suitable nutrient ratio. Based on soil fertility conditions and tea yield, determine the nitrogen fertilizer amount and enhance the combined application of phosphorus, potassium, and magnesium fertilizers, paying attention to the supplementation of sulfur, boron, and other nutrients; 3. For tea gardens with severely acidified soils (soil pH < 4), measures such as applying lime, soil conditioners, or increasing the application of mature livestock manure can be taken to gradually improve the soil; 4. Combine scientific fertilization with green cultivation techniques that increase yield and efficiency. II. Methods of Fertilization 1. Timing of base fertilizer application: It…

Timely perform summer pruning on tea bushes According to weather forecasts, Hangzhou will see the end of its plum rains around July 9th this year, and summer pruning can be conducted in the first and second decades of July. For those tea bushes that underwent heavy pruning after spring tea harvest and have shown vigorous growth with new shoots exceeding 50 centimeters in height, summer pruning is necessary. The purpose of summer pruning on tea bushes: First, it controls the height of the tea canopy; second, it increases the density and quality of autumn shoots while reducing branching; third, it decreases flowering and fruiting in the autumn. By performing summer pruning, high-quality autumn shoots are cultivated, ensuring a high yield of quality spring tea in the following year. Specific operations for summer pruning: Fertilize before pruning. 1. Trench application of top dressing: Open shallow trenches 10-15 centimeters deep along the rows of tea bushes, apply 30-50 kilograms per mu of high-nitrogen compound fertilizer, and cover with soil afterward. 2. Use a motorized double-person pruner or an electric single-person pruner to trim approximately 20 centimeters above the previous cut (leaving 3-5 leaves on the new branches grown after spring tea harvest).…

Impacted by a moderate-strength El Niño event, and superimposed on the backdrop of global warming, the global average temperature in 2023 may break the record for the warmest year set in 2016. It is expected that temperatures in most regions of China will be close to or higher than the long-term average this winter through to next spring, but with active cold air phases. Precipitation in southern regions is expected to be above normal, increasing the risk of compound meteorological disasters. Given these complex climate changes, timely management of tea gardens during winter can help them safely overwinter and lay a foundation for high-quality tea production and increased income for tea farmers in the coming year. So how should we manage tea gardens in winter? Follow along as we look at the winter and spring tea garden management technical guidelines developed jointly by the Department of Plant Industry Management of the Ministry of Agriculture and Rural Affairs, the National Agricultural Technology Extension Service Center, and the Expert Advisory Group for Tea of the Ministry of Agriculture and Rural Affairs. 1. Disaster Prevention 1.1 Preventing Frost Damage Monitor weather forecasts closely. Before a cold wave, implement frost protection measures such as…

Summer and autumn are critical periods for tea garden management. Strengthening summer and autumn tea garden production management is the foundation for ensuring high-quality and high-yield summer and autumn tea and the following spring tea. The Planting Industry Management Department of the Ministry of Agriculture and Rural Affairs, together with the National Agricultural Technology Extension Service Center, the Expert Advisory Group for Tea of the Ministry of Agriculture and Rural Affairs, and the National Tea Industry Technology System, have developed the following technical guidance on summer and autumn tea garden production management and disaster prevention and mitigation. Strengthening Tea Garden Production Management (1) Tea Plant Pruning - For year-round harvesting tea gardens, promptly perform the initial light pruning after spring tea harvesting, cutting off the top 5-10 cm of shoots from the canopy. During summer tea harvesting, it is advisable to allow some growth retention and use the leaf-retention method or tip-picking method to maintain an appropriate leaf layer thickness. Harvesting should be appropriately stopped earlier in autumn to avoid affecting the yield and quality of the following year's spring tea. To cultivate a good picking surface, the second light pruning should be completed before mid-July, with the pruning height…

(1) Timely Pruning When pruning tea trees that have suffered from freezing, it is essential to tailor the approach based on local conditions and specific gardens. For tea gardens primarily focused on harvesting high-quality teas, different levels of pruning should be applied according to the severity of freezing damage. If only some tender leaves are affected, no pruning may be necessary; if parts of the branches and leaves lose vitality after freezing, pruning is required to encourage new shoots and develop a strong framework and picking surface. When most tea plants suffer damage to the foliage and branches 3-5 cm above the picking surface, light pruning is recommended; in cases of more severe damage where the main branches are also affected, heavy pruning should be performed; if the damage is extremely severe and the above-ground branches and leaves have lost vitality, coppicing (cutting back severely) is appropriate. Pruning should ideally be carried out in early spring when temperatures have stabilized and there is no risk of a late cold snap. For mechanical harvesting gardens focused on bulk tea production, pruning should follow the principle of "catering to the majority, consistency within the garden." Different depths of pruning should be used…

Recently, in response to the persistent high temperatures and drought conditions across multiple regions of the province, the Provincial Tea Industry Technology System and the Science and Technology Service Team for the "515" Action Plan in the tea industry have been working under high temperatures and visiting grassroots levels to conduct research and guidance. Considering the actual situation of tea production in our province, the following technical measures are proposed to cope with extreme high-temperature weather, for reference by tea-producing areas. I. Emergency Technical Measures for Tea Garden Management 1. Timely and Reasonable Irrigation For tea gardens with irrigation facilities, various methods such as spray irrigation, drip irrigation, and surface irrigation can be employed to water the plants, preferably during the morning or evening. Spray irrigation is particularly effective, as it not only alleviates water shortages caused by drought but also reduces near-surface temperatures in the garden, mitigating the impact of high temperatures. When using surface irrigation, care should be taken to avoid excessive water flow that could result in surface runoff, wasting water resources and causing soil compaction in the tea garden. 2. Scientific and Effective Shading Using shade nets to provide shading for tea gardens can immediately and…

The tea picking technique directly affects the yield and quality of tea. A scientifically sound picking technique should accurately control the picking standards, methods, cycles, and storage of fresh leaves while balancing the relationship between picking and nurturing. Below is an introduction to the manual picking technique for high-quality green tea fresh leaves. Tea Picking Standards The picking standards are determined based on factors such as the tea plant variety, growth status, new shoot development, and the type of processed tea product. Generally, high-quality green tea is picked at a tender stage, starting with single buds, followed by one bud and one initial leaf, one bud and one full leaf, and one bud and two initial leaves. For needle-shaped teas, picking ranges from one bud and one initial leaf to one bud and two initial leaves, while flat bud-shaped teas are picked from single buds to one bud and one initial leaf. Tea Picking Period In spring, when picking fresh leaves for high-quality green tea, harvesting should commence when 5% to 10% of the buds and leaves on the tea plant canopy reach the picking standard. Based on the sprouting of buds and leaves, picking should be organized every 1…

Guidelines for High-Temperature Drought Early Warning and Disaster Mitigation Measures in Tea Gardens Hunan Provincial Tea Industry Technology System Li Saijun & Li Wei July 25, 2024 Since early July, our province has been experiencing persistent high temperatures and droughts, with the drought rapidly worsening in most areas, severely impacting normal tea garden production. On July 25, the Hunan Meteorological Observatory issued the first red alert for extreme heat of the summer. In response to this extreme high-temperature and drought climate disaster, the Hunan Provincial Tea Industry Technology System has timely provided technical guidance, proposing specific measures for pre-disaster prevention and protection, as well as post-disaster recovery work in tea gardens. I. Pre-Disaster Prevention and Protection Measures (1) Interspace Covering ① Lay an appropriate amount of straw, fallen leaves, etc., in the gaps between tea plants to cover the soil surface at a thickness of 5-10 cm. This layer helps protect the soil, reducing water evaporation and aiding in the retention of nutrients in the soil. ② Intercropping green manure can effectively provide shade, reduce temperatures, and improve the microclimate within the tea garden, thus effectively preventing damage to tea plants from high temperatures and intense sunlight. (2) Scientific Shading…

Recently, there has been a significant temperature drop in the tea-growing areas north of the Yangtze River, south of the Yangtze River, eastern parts of the southwestern region, and southern China. Some regions have experienced temperature drops exceeding 18°C. The province has seen the most extensive freezing weather since winter began, with minimum temperatures dropping below 0°C in all areas except parts of the Qiannan Buyi and Miao Autonomous Prefecture. Prolonged low temperatures, freezing conditions, and snowfall will cause varying degrees of damage to factories and seedling greenhouses in some tea-growing areas, adversely affecting young tea seedlings and mature tea plants, delaying harvesting times, and reducing tea production. Urgent action is needed to prevent and mitigate the impact of freezing weather. To cope with the cold snap and minimize freeze damage to tea gardens and facilities, based on technical guidance developed by the Department of Crop Management under the Ministry of Agriculture and Rural Affairs, together with the National Agricultural Technology Extension Service Center, the Expert Advisory Group on Tea of the Ministry of Agriculture and Rural Affairs, and the Tea Research Institute of the Chinese Academy of Agricultural Sciences, and considering the actual situation in Guizhou, the following preventive…

The tea regions of Guiyang City have been frequently impacted by extreme spring weather in recent years. According to meteorological forecasts, the city is expected to experience another cold wave soon. To cope with the upcoming temperature drops, thunderstorms, and late spring cold snaps, this document, "Preventive and Remedial Measures for Low-Temperature Freeze Damage (Late Spring Cold Snap) in Guiyang and Guian Tea Gardens," has been specially formulated for your reference. I. Preventive Measures (1) Pay Attention to Cold Wave Forecasts Strengthen forecasting and early warning systems for disastrous weather conditions, promptly issue cold wave information, and prepare in advance. After a cold wave forecast is released, tea gardens that are already open should mobilize manpower to harvest as much as possible to minimize losses from frost damage. (2) Cover Tea Gardens for Frost Protection Straw, bamboo leaves, and rice husks can be spread between rows of tea plants to keep them warm, ideally at a thickness of about 10 centimeters, which can generally increase temperatures by 1-2°C. In tea gardens on windward slopes prone to frost damage, cover the canopy with straw, weeds, or shade nets, not too tightly so that the tea plants are still visible. This will…

According to forecasts from our city's meteorological station, from 14:00 on July 10 to 08:00 on July 11, the average precipitation in our city was 52.6 millimeters, with a maximum of 179.2 millimeters. Four towns and streets experienced heavy rainstorms (100–250 millimeters), 24 towns and streets experienced storms (50–100 millimeters), and 13 towns and streets experienced heavy rain (25–50 millimeters). Other towns and streets experienced moderate rain (10–25 millimeters). To effectively mitigate the impact of disastrous weather on tea gardens and tea production and stabilize summer and autumn tea production, the following technical guidance is proposed. I. Strengthen Patrols and Preventive Measures in Tea Gardens The flood season has arrived, and strong winds and heavy rains may occur at any time. We should closely monitor weather forecasts. Before heavy rains, strengthen patrols of tea gardens and reinforce greenhouses and other production facilities. Check and dredge drainage ditches in advance; dig drainage trenches where necessary, especially in low-lying or high groundwater areas, where trenches should be at least one meter deep. Move tea, production materials, and equipment from low-lying areas as a precaution against heavy rains. II. Promptly Drain Flooded Tea Gardens After heavy rains, organize labor to drain water from…

Affecting a moderate-strength El Niño event and superimposed on the backdrop of global warming, the average global temperature in 2023 may break the record for the warmest year set in 2016. It is expected that most regions in China will have temperatures similar to or higher than the long-term average this winter through next spring, but with active cold air phases. Precipitation in southern regions will be above normal, increasing the risk of compound meteorological disasters. In response to complex climate changes, timely management of tea gardens during winter can help ensure their safe overwintering and lay the groundwork for high-quality and high-yield tea production and increased income for tea farmers in the coming year. So how can we properly manage tea gardens in winter? Follow along as we explore the winter-spring tea garden management guidelines developed by the Department of Plant Industry Management of the Ministry of Agriculture and Rural Affairs, in collaboration with the National Agricultural Technology Extension Service Center and the Expert Advisory Group on Tea of the Ministry of Agriculture and Rural Affairs. 1. Disaster Prevention 1.1 Freeze Prevention Closely monitor weather forecasts and implement protective measures such as mulching between rows and covering the canopy…

Technical Guidance on Winter and Spring Tea Garden Management National Agricultural Technology Extension Service Center, Expert Advisory Group of Tea, Ministry of Agriculture and Rural Affairs The spring tea is the most crucial part of the annual tea production. The winter and spring seasons are critical for enhancing tea garden management and improving the quality and efficiency of spring tea. To strengthen the management of tea gardens in winter and spring, the Planting Industry Management Department of the Ministry of Agriculture and Rural Affairs has collaborated with the National Agricultural Technology Extension Service Center and the Expert Advisory Group of Tea, Ministry of Agriculture and Rural Affairs to develop the following technical guidance for winter and spring tea garden production management. I. Disaster Prevention 1. Freeze Prevention: Closely monitor weather forecasts. Before cold waves, apply straw mulch between rows and cover the tea canopy with straw mats, plastic films, or shade nets to prevent freezing. After the cold wave, remove the canopy coverings promptly. During a cold wave, irrigation or spray irrigation can be used to mitigate cold and freeze damage. After temperatures return to normal, prune the frost-damaged tea garden. For mild frost damage, perform light pruning to remove…

Tea plants are perennial woody plants: they have a total developmental cycle that spans their entire life, as well as an annual developmental cycle that governs their growth and dormancy throughout the year. The total developmental cycle builds upon the annual cycle, which is constrained by and follows the rules of the overall development.Based on the reproductive characteristics of tea plants and practical applications in production, they can be divided into four biological age periods: seedling stage, juvenile stage, adult stage, and senescent stage. 1Seedling Stage of Tea Plants This typically begins from seed germination or successful cuttings until the tea plant emerges from the ground and reaches its first period of growth cessation, usually lasting for one year. The key management focus during this period is to ensure water supply, maintain humidity, and provide shade. 2Juvenile Stage of Tea Plants This stage runs from the first period of growth cessation (usually winter) until the tea plant is ready for commercial production. It generally lasts 3 to 4 years. The duration of this period is closely related to cultivation management and natural conditions. The juvenile stage is the most malleable period for tea plants. Cultivation practices must focus on shaping…

Although tea trees have a certain ability to withstand adverse weather conditions during their growth and development, they can be harmed if the conditions exceed a certain limit. This can range from reduced yield and quality of the leaves to the death of the tree. So what are the effects of low temperatures on tea trees? I. Common types of frost damage in tea trees The common types of frost damage in tea trees include snow frost, frost, and dry cold wind frost. In tea-producing areas south of the Yangtze River, snow frost and frost are predominant, while all three types of frost occur in areas north of the river. After being affected by frost, tea trees typically exhibit red withering or green withering. In areas south of the Yangtze River, red withering is more common, while both forms occur in areas to the north. II. The sequence of frost damage development in tea trees Tea trees have a certain ability to resist low temperatures, but different organs have varying degrees of cold tolerance. Among leaves, stems, and roots, cold tolerance decreases in that order. However, under field cultivation conditions, leaves protect the stems, and the stems and leaves together…

Green Pest Management Techniques for Tea Trees Main Targets of Control ↑ Tea Blight Disease → Tea Looper Pests: Tea Green Leafhopper, Tea Looper, Tea Caterpillar, Tea Black Worm Moth, Black Scale Psyllid, Tea Red Mite. Diseases: Tea Blight Disease, Tea Anthracnose. Key Control Measures Agricultural Control 1. Timely Harvesting. Harvest young buds and leaves according to the requirements of tea production to reduce the population of pests like the tea green leafhopper, mites, and some bud diseases residing on the canopy surface of the tea tree. 2. Pruning as Needed. Prune tea trees after the spring harvest and in late autumn according to the requirements of tea garden management, reducing pest populations and creating conditions unfavorable for pests. Generally, deep pruning or heavy pruning is done after the spring harvest, and light pruning is performed in late autumn. 3. Garden Tilling. In late autumn, till the tea garden combined with the application of base fertilizer, which is detrimental to the survival of scale insects and weevils overwintering in the soil, thus reducing their occurrence in the following year. 4. Timely Garden Cleanup. Clear and bury leaves and topsoil near the roots of tea plants in late autumn, which can…

For tea trees of different ages, the methods of mechanical pruning vary. For young tea trees, the primary focus is on shaping pruning; for mature tea trees, light and deep pruning are predominant; and for old tea trees, rejuvenation pruning and stump cutting are mainly conducted. Generally, pruning around the time of Jingzhe (Awakening of Insects) yields good results. However, from an economic perspective, young tea trees should be pruned at the beginning of Lichun (Start of Spring), while other tea trees should be pruned after tea picking. Light Pruning Light pruning effectively promotes the sprouting and growth of tea buds. It also increases the density of productive branches, widens the tree canopy, and creates a favorable picking surface. For mature tea trees, light pruning should be conducted every two years, timed when the upper part of the tea tree stops growing. In regions prone to frost damage, pruning can be done half a month to one month before the spring sprouting of tea buds. For famous tea gardens, light pruning can be conducted after spring tea picking. During light pruning, hedging shears or pruning machines are primarily used to trim off about 4 cm of foliage and branches from…

In order to effectively ensure the safe overwintering of tea plants and the high-quality production of Guyu tea next year, on December 19, Professor Ding Zhaotang, a Taishan Scholar and Chief Expert of the Provincial Tea Industry Technology System, led his team to Feixian County to conduct a survey on winter tea garden management and cold resistance technology trials and demonstrations. Experts from the Tea Research Institute of Shandong Academy of Agricultural Sciences, Qingdao Agricultural University, Liaocheng University, Shandong Agricultural University, the Municipal Agricultural Technology Center, and the Feixian Fruit and Tea Service Center, as well as technical personnel from tea companies, totaling more than 20 people, participated. The winter management of tea gardens is an important part of annual tea production and is also key to increasing the yield of spring tea and improving the quality of fresh leaves. The Provincial Tea Industry Technology System continues to increase its research efforts on winter tea garden management. Chief Expert Ding Zhaotang's team surveyed the basic situation of winter management, ecological environment, and overwintering of tea plants at the tea gardens of Shandong Chunxi Tea Co., Ltd. They analyzed and discussed factors that might cause frost damage in the tea gardens…

Main pests in autumn tea gardens and their control measures. The weather gradually cools down in September, with vigorous growth of tea plants and abundant food for pests, which is very conducive to the occurrence of pests such as mites and tea green leafhoppers. If not controlled in time, they can easily cause outbreaks that severely impact the yield and quality of next year's spring tea. The main pests occurring currently and their control measures are as follows: I. Tea Orange Spider Mite This pest is small in size, with adult and juvenile mites piercing and sucking tea plant sap. When mite numbers are low, the damage is not obvious and hard to detect. However, when mite numbers increase, the veins of affected leaves turn red, the leaves lose their green color and luster. Severe infestations result in a brown rust appearance on the underside of the leaves, withered and dried shoots and leaves, and a scorched appearance, and may even cause defoliation. Some tea gardens have experienced heavy infestations recently. Without effective control measures, mite populations will continue to rise. The following measures are recommended for control: 1. Strengthen garden management by removing weeds and fallen leaves. Timely picking…

Since February 22, most areas of our province, except some tea regions in Qiandongnan and Qiannan such as Qiannanwest, have suffered from a sudden drop in temperature and extreme weather conditions of low temperature and freezing. Preliminary investigations indicate that tea trees in various tea regions have shown varying degrees of symptoms of low-temperature stress, with more severe impacts in higher altitude tea gardens, leading to reduced yields or delayed picking. To mitigate the effects of low temperatures and freezing on spring tea, experts from the Tea Special Task Force, Guizhou Tea Research Institute, Zunyi Comprehensive Test Station of the National Tea Industry Technology System, and Guizhou Province Tea Industry Technology System have jointly studied and proposed the following remedial measures: 1. Timely and Moderate Pruning After temperatures stabilize, prune according to the degree of freezing damage to the tea plants, removing frozen branches and leaves promptly. Pruning should be carried out after the temperature rises and will not cause further serious freezing damage. The depth of pruning should vary depending on the severity of the freeze, ideally cutting 2-3 cm deeper than the dead tissue. For lightly frozen tea plants where only the edges of mature leaves or winter…

The main goal is to improve the soil condition, increase nutrient availability, and create favorable conditions for tea plant growth, with tasks including soil cultivation, weeding, fertilization, and moisture retention. I. Garden Cultivation Reasonable cultivation is an important measure to improve the soil condition in tea gardens, which can enhance the micro-ecological environment of the soil and provide good conditions for the growth and development of tea plants, improving their vigor. 1. Shallow Cultivation and Weeding The purpose of shallow cultivation in tea gardens is to remove weeds, loosen the surface soil, and improve the micro-ecological environment of the surface soil layer. The depth of shallow cultivation is generally around 5 cm, and it can be combined with top-dressing and soil mounding. It's also essential to clear weeds and brambles around the tea garden promptly. For young tea gardens that are not yet closed row, cultivation should be done whenever weeds appear, requiring six to seven weedings per year. Since the root system of young tea gardens does not penetrate deeply in the planting year, shallow cultivation before the high-temperature season should be done early to avoid drought immediately after cultivation. For mature tea gardens, cultivation is divided into spring,…

According to the Rizhao City Meteorological Bureau's cold snap blue warning notice, affected by strong cold air, our city is expected to experience a cold snap from December 24th to 26th, with a temperature drop of 8-10°C. The lowest temperatures will occur on the morning of the 26th, with inland areas reaching around -10°C and coastal areas -8°C. On the 24th, daytime and nighttime northerly winds will strengthen to 5-6 on land, with gusts up to 8, gradually weakening on the 25th. Additionally, there will be sleet turning into light snow, with some areas experiencing moderate snow, from the daytime of the 24th through the night. Due to the significant temperature drop and low temperatures accompanied by light to moderate snow, there may be noticeable frost and snow damage, which could adversely affect tea plants overwintering in our city. To mitigate the impact of extreme weather on tea plants, the City Agricultural Technology Service Center has formulated technical guidance for tea gardens dealing with extreme weather. I. General Strategy for Winter Protection in Tea Gardens During Extreme Weather In the event of strong winds, heavy snow, and drastic temperature drops, timely winter protection measures should be taken for tea gardens.…