Technical service information of scientific and technological anti-freezing and post-disaster tea trees
1. Remedial measures for tea trees after the disaster:
1. Scientific pruning: due to the different degrees of freezing in tea gardens with different varieties, different elevations and different slopes, the tea trees in the tea gardens with large leaves, high altitude and north slope are seriously damaged by frost. Timely and reasonable pruning should be carried out according to the degree of freezing injury. When the temperature rises steadily, the situation of tea trees suffering from frost damage should be observed, and light pruning should be used for those with less freezing damage, that is, about 3 cm under the leaf surface. Deep pruning was carried out for those with severe frost injury, and the plant was cut off from 1 / 2 to 1 / 3, while those with particularly severe frost injury were re-pruned or table-cut, and the crown was recultivated.
2. Shallow ploughing and topdressing: the management of water and fertilizer should be strengthened after pruning of frozen tea trees, which can quickly restore vitality, improve resistance, promote tea bud germination and rebuild the crown. When the temperature rises to more than 10 ℃, combined with shallow tillage and weeding in early spring, topdressing available fertilizers, such as ammonium sulfate and urea, combined with a certain amount of phosphorus and potassium fertilizer, a small number of times.
3. Reasonable picking: due to the loss of a large number of leaves and post-disaster pruning after the tea tree is frozen, the chlorophyll layer is reduced or all cut off, so it is necessary to re-cultivate the crown, so we should pay attention to reasonable picking. For deep pruning or table cutting, spring shoots should be kept and summer tea should be topped to cultivate the crown.
2. Rescue measures for frostbitten tea seedlings:
The main results are as follows: 1. For the seedling breeding base, measures such as building a greenhouse, covering sunshade net, agricultural film and rice straw are taken to protect the seedlings to ensure the safety of seedlings from the cold.
2. For the frostbitten tea seedlings, organic fertilizer should be applied and foliar fertilizer should be sprayed to improve the cold resistance and restore ability as soon as possible.
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Rational layout of improved Tea varieties in Liandu District
Liandu District of Lishui City is located in the hinterland of southwestern Zhejiang, the middle reaches of Oujiang River, surrounded by green mountains and clear water, is extremely rich in ecological resources, is a national ecological demonstration area, forest coverage of more than 80%, known as the "green lotus capital". Liandu District has four distinct seasons and a mild climate, which belongs to the mid-subtropical monsoon climate zone. The soil is mainly red-yellow soil and lithologic soil, and the pH value is mostly between 4.5 and 6.5, which is very suitable for tea planting and the tea produced is of good quality. 1. General situation of Tea production and structure of improved Tea varieties in Liandu District
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Huang Qi (Tea Tree)
Variety approval No.: national examination Tea 2002018 crop species: tea Variety name: Huangqi breeding Unit: tea Research Institute of Fujian Academy of Agricultural Sciences Variety Source: Golden Cinnamomum × Baiqilan (Natural Hybridization) Provincial examination and approval: characteristics approved by Fujian crop Variety approval Committee in 1994: small tree type, middle leaf type, mesophytic early species. The crown is tall, the tree posture is half-open, and the branching ability is medium. The leaf is oval, the leaf color is green, the leaf surface is slightly raised, the leaf tip is acuminate, the leaf is thick and crisp. Bud leaf growth
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