Drought and Drought Resistant Techniques in Tea Garden in Summer and Autumn

High-temperature and dry weather in summer and autumn caused great losses to tea production throughout the country. In severe cases, many nursery stocks in young tea plants died. The production of tea orchards in summer and autumn caused a significant reduction in production and income, and the production of spring tea in the coming year also led to a reduction in spring tea production. It is particularly important for all tea production units to strengthen the drought- and drought-resistant work in tea gardens. 1. Strengthen management of fertilizers and improve drought resistance of tea plants The production of spring tea consumes a lot of nutrients in tea plants and should be supplemented in time. After the end of spring tea, cultivating and weeding is conducted before the onset of the dry season. The depth of cultivation is 5 to 10 cm, which reduces the evaporation and consumption of ground water and improves the water retention capacity of the soil. And timely application of quick-applicable fertilizer, 15-20 kg of compound fertilizer per acre, can also spray 0.5% urea or multi-element liquid fertilizer 2-3 times, increase tea nutrients absorption and storage, improve resistance. During this period, it is also a period of high incidence of small green leafhoppers and mites, and insecticides should be used to prevent and control high-level, low-toxic, low-residue and broad-spectrum pesticides. The tea areas that are used to pruning after spring tea should be held before the “meiyu” and avoid cutting into the dry season to accelerate the occurrence of drought. 2. Tea plantation irrigation, direct and effective tea plantation with sufficient water supply and conditional irrigation, using irrigation water and cooling, direct and effective drought and drought relief. Sprinkler irrigation, drip irrigation, flow irrigation and watering can be performed in the early morning and evening. Most mountain tea gardens can be used to build reservoirs that store enough water during the rainy season and provide water for irrigation, spraying, and fertilizer application during drought. 3, shade trees, intercropping green manure, improve the ecological environment in the tea plantation shade planting between the rows, such as Wuyi, Du Ying and other broad-leaved species, 5-8 per acre, but also intercropping tea, improve the tea garden microclimate. Summer green manure interplanting between tea gardens can not only increase soil organic nutrient content, improve soil structure, but also increase the green coverage among tea plantations, reduce soil exposure, reduce ground temperature, reduce surface runoff, and increase rainwater infiltration. Leaf sparse, branches are umbrella-shaped peanuts, soybeans, big leaf pig kidney beans, mung beans, ramie and so on. 4. The tea gardens cover the shade with shading nets, and the cooling down obviously makes it possible to stabilize the soil thermal changes, reduce the evaporation of surface moisture, prevent or reduce the heat and drought damage of tea trees, and secondly, it can slow down the surface runoff and prevent or reduce the The soil is washed away, and it promotes the infiltration of rainwater into the soil, increasing soil water storage capacity, increasing soil moisture content, and exerting soil conservation, water conservation, and fertilizer retention effects. Third, it can increase soil organic nutrients, keep soil loose, and inhibit weed growth. It will help improve the quality of tea and increase the output of tea. It is best to lay all the gaps in the tea plantations on the tea garden with grass. The principle is not to see the soil after the grass is planted. It is required that the thickness of the grass should be between 8-10 cm. The grass should not be carried with grass seeds or straw without pests. Green manure, bean stalks, mountain grass, wheat straw, bagasse, general acres of grass 1000-1500 kilograms. Conditional ground and gentle hillside tea gardens can be shaded with plastic shading nets in the dry season. They are set off from the ground by 1.8-2 meters. The shading nets are 50-60 cm above the tea tree cover, which is convenient for tea garden management and picking. 5, rational picking, to support the main summer and autumn in order to produce middle and low-grade tea-based, economic efficiency is generally not too high, should be based on retention, the implementation of timely picking and batch picking principles, leaves leaf mining, should not The method of picking up light leaves a certain layer of green leaves. 6. Matters needing attention when drought occurs One week after continuous high-temperature drought, weeding should be avoided to avoid weeding. If necessary, we can cut high grass to cover in situ, avoid pruning, and do not apply organic fertilizer to avoid aggravating drought and heat damage. 7. Tea tree remediation measures after drought After the drought is lifted, timely cultivating and fertilizing should be carried out to supplement the nutrients, and the damaged branches and leaves should be cut off. Pay attention to the control of pests and diseases, and try to restore the growth potential of the tea tree before the low temperature comes. At the same time, various measures were taken to curb the flowering of tea plants and reduce the nutrient consumption of reproductive growth.

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