Magnesium

First article: Representative Varieties and Three Aromatic Zones in the Yiwu Tea Area (click to read); Second article: Dongguan Warehouse, Kunming Warehouse, Hong Kong Warehouse, Flavors, White Frost, "Warehouse Manipulation" Issues (click to read); Third article: Storage Cycle Issues for Yiwu Green Bud Tea (click to read); Fourth article: Storing Puer, Pursue Famous Mountain Origins or Quality? Fifth article: Differences in Small Heap Fermentation, Large Heap Fermentation, and Tea Evolution Ripe Tea Techniques? The following is Part Four, focusing on storing Puer, pursuing famous mountain origins or quality? Shi Yun: I would like to express great appreciation for Teacher Li Yang's sharing. A young lady just now wanted to ask President Zheng and Teacher Li Yang about a conversion issue. Zhou Xin: Teacher, regarding storage, for example, Tianmen Mountain, does it mean that as long as its glycoside content is high, and the catechin and caffeine content is low, it suggests that it requires higher humidity? And Menghai tea, with higher catechin and caffeine content, has lower humidity requirements, only forming white frost when humidity exceeds 14%. This is the first time I've heard this, so I want to confirm if my understanding is correct. Zheng Shaohong: Indeed. For instance,…

I. Poor Quality Manifestations The main manifestations of poor quality in albino tea include overgrowth of new shoots, distortion of buds and leaves, hindered recovery to green, and physiological disorders. 1. Overgrowth of New Shoots Overgrowth is the mildest manifestation of poor quality. When new shoots develop to have two or three leaves, they no longer produce new leaves but instead show a significant increase in stem length. The length of a one-bud-two-or-three-leaves shoot can reach over 10 cm, sometimes even exceeding 15 cm. These buds and leaves are well-albino, but due to their excessive length, they are unsuitable for flat or strip-shaped tea processing. However, there is still room for processing into coiled or curled teas. This phenomenon is more likely to occur in leaf-white type albino teas. Morphology of Overgrown Albino Shoots 2. Distortion of Buds and Leaves Distortion primarily occurs in tea buds that sprout later during lower temperatures. It is characterized by hooked bud shapes, hardened green stems, long and slender leaves resembling willow leaves, twisted leaf surfaces with asymmetric veins, irregular leaf margins, and snow-white coloration that is hard and thin. These buds and leaves cannot be processed into normal fresh leaf shapes, and the…

In recent years, the area of tea gardens has grown annually in response to the increasing demand in the tea market. However, the expansion of tea garden areas has brought about a series of issues including soil erosion, acidification, and reduced fertility, which are detrimental to tea yield and quality. This article, based on the current distribution of tea gardens in our country, summarizes the more common problems in the tea garden soil environment. It also analyzes the remediation effects and mechanisms of applying biochar, microbial fertilizers, and compound conditioners, aiming to provide a theoretical foundation for future soil improvement work in tea gardens and the promotion of soil conditioners. This article, based on the current distribution of tea gardens in our country, summarizes the more common problems in the tea garden soil environment. It also analyzes the remediation effects and mechanisms of applying biochar, microbial fertilizers, and compound conditioners, aiming to provide a theoretical foundation for future soil improvement work in tea gardens and the promotion of soil conditioners. I. The Area and Distribution Characteristics of Tea Gardens in Our Country As of 2022, the total area of tea gardens in our country has reached 3.3303 million hectares, ranking…

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…

Many tea enthusiasts have encountered an issue where, when brewing a particular serving of tea, the first few infusions already exhibit a heavy water taste, giving the impression of separate tea and water. Why does this happen during tea brewing? Here are some possible reasons: Hard Water Quality The hardness of water affects the solubility of compounds within the tea leaves. Soft water has a higher solubility, resulting in a stronger tea flavor. Hard water, which contains higher levels of calcium, magnesium ions, and minerals, has a lower solubility, leading to a milder tea taste. Therefore, we should choose soft water whenever possible and avoid using high-hardness water like well water for tea brewing. Insufficient Water Temperature The solubility of tea is directly proportional to the water temperature. If the water temperature for brewing is too low, the solubility of the compounds in the tea leaves will be reduced, resulting in a weaker tea taste and a more pronounced water taste. There's no need to overly worry about high temperatures destroying vitamins in the tea, as the vitamins in tea are relatively stable, and their loss at high temperatures is actually quite limited. Weather Conditions During Tea Processing Spring tea…

"Tea grown in the crevices of rocks not only contains rich organic matter but also essential trace elements such as calcium, magnesium, and iron for the human body..." Mr. Yang in the live stream enthusiastically introduces this to netizens. Guodazhai Township, a place where the Yi and Bai ethnic groups reside, is located in the southwestern part of Fengqing County, over 80 kilometers away from the county center. It is a town with prominent karst topography, dotted with peculiar peaks and strange rock formations. The highest peak is Mount Wanming at an elevation of 2,905 meters. Here, winters are mild and summers are cool, with an average temperature of 16.5°C and annual precipitation of 1,506 millimeters. Fifteen rivers, including the Yalang River, Qiongying Stream, Yanfeng Mountain River, and Shuimuo River, as well as five reservoirs like Guodazhai Reservoir, Jinchangba Reservoir, and Ganlongtang Reservoir, together form the veins of this land. The Yalang River runs through the township, dividing its 11 villages into eastern and western regions. From the river valley to the mountainous areas, the land is suitable for tea cultivation. There are nearly 30,000 mu (approximately 2,000 hectares) of tea gardens in the township, producing almost 2,000 tons annually.…

When brewing tea, you may occasionally encounter a situation where the water taste is prominent. What causes this? It is mainly due to the impact of water on the tea brewing process. So what effects do water quality and water temperature have on tea brewing? Why does tea have a strong water taste when brewed? Here are some reasons: 1. Hard Water Quality The hardness of the water affects the solubility of compounds in the tea leaves. Soft water has a higher solubility, resulting in a stronger tea flavor. Hard water contains more calcium, magnesium ions, and minerals, leading to lower solubility and thus a weaker tea flavor. Therefore, we should try to choose soft water and avoid using high-hardness water like well water for tea brewing. 2. Low Water Temperature The solubility of tea is proportional to the water temperature. If the water temperature used for brewing is too low, the amount of compounds dissolved from the tea leaves will be small, leading to an insufficient tea flavor and a more pronounced water taste. There's no need to overly worry about high temperatures destroying vitamins in tea, as the stability of vitamins in tea is relatively high, and the…

In daily life, to know how to preserve tea, one must first understand what damages it. Only then can one know how to store it to avoid such damage. Different types of tea have different characteristics and are damaged in different ways and to varying degrees, so the methods and requirements for their storage also differ. Many people do not know how to store green tea after opening it, which can lead to the tea going bad or losing its flavor. Under normal circumstances, green tea can be stored at room temperature for about a year; however, once opened, it should be transferred into an airtight container and used within two months if possible. Since green tea is prone to absorbing moisture, even unopened tea stored for too long will lose its aroma, so it should be brewed while fresh. Here are some key taboos to remember when storing green tea: The Five Taboos of Storing Green Tea 1. Avoid Moisture Firstly, one must be very careful to avoid moisture when storing green tea, as most tea enthusiasts know. Most teas have a strong tendency to absorb moisture and humidity. A relative humidity of 60% is suitable for storage, but…

Good tea thrives with proper nutrition; fertilizers are the material foundation for increasing yield and improving quality in tea production. Fertilization plays a crucial role in the growth of tea plants and the yield and quality of tea leaves. While some nutrients are supplied by the soil itself, its nutrient content is limited and subject to environmental factors, leading to significant losses through leaching and volatilization, which greatly reduces nutrient availability. This is insufficient to meet the needs of tea plant growth, let alone high yields and quality standards. Additionally, as a leaf-harvesting crop, the annual harvest of large quantities of buds and leaves removes a certain amount of nutrients. Therefore, most nutrients must be replenished through fertilization. When soil nutrient imbalances occur or there is an extreme deficiency of one or more nutrients, it is necessary to use appropriate fertilizers to correct the nutritional deficiencies to ensure high-yield and high-quality tea production. Therefore, proper management of tea gardens during different seasons is crucial, and fertilization is a key technology in garden management that should receive significant attention. Especially during autumn, a critical period for tea garden management, the focus is on rapidly restoring tree vigor to lay the groundwork…

To strengthen the management of tea gardens during summer and autumn and ensure production of teas during these seasons as well as the following spring, the Department of Plant Industry Management of 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 National Tea Industry Technology System, have proposed technical guidelines for tea production in summer and autumn 2024. Strengthen Fertilization Management of Tea Gardens 1. Top-Dressing Fertilization in Tea Gardens (a) Root Fertilization: Top-dressing fertilization for summer tea should be carried out after the spring tea harvest, and for autumn tea after the summer tea harvest. For tea gardens in production, about 15-20 kg of urea or 20-30 kg of specialized compound fertilizer for tea (with a formula of 18:8:12 N:P2O5:K2O) is generally applied per mu, with higher-yielding gardens receiving slightly more. Image Source: Anji White Tea Website Fertilizer should be applied in trenches dug vertically below the edge of the tree canopy, with a depth of about 10-15 cm. Broadcasting of fertilizer is prohibited. In young tea gardens (1-2 years old), fertilizer should be applied 5-10…