Chestnut Garden Winter Management Technology

The chestnut management of adult chestnut fruit trees in winter directly affects the growth of chestnut trees in the coming year, and the yield and quality of chestnut fruit. Because chestnuts in winter have a dormant state, they undergo tremendous changes in vivo. Relatively low temperature, low soil moisture, good soil permeability, rich organic matter content and reasonable pruning are conducive to flower bud differentiation and new root germination. To this end, the management of the chestnut field at this stage should focus on the following four technical measures:
First, expansion of soil to improve soil: generally after the fruit is taken in the fall to winter before the leaves. When expanding a hole, it is performed outside the canopy drip line, and the depth is 40-60°. The closer it is to the tree, the shallower it is. The material for earth-enlarging that is filled in by expanding the hole can be adjusted according to local conditions and can be obtained locally. Green manure, manure, compost, mountain grass, forest litter, forest humus or crop stalk can all be used. The earth-improving materials can be mixed with topsoil, mixed fertilizer, etc. and then layered and filled. If the pH value of the soil is less than 5.0, the surface of each layer of the filler shall be sprinkled with quantitative lime to neutralize acidity to promote the decomposition of the applied organic fertilizer and increase the calcium nutrition of the soil. Fill the soil in the top floor and mix some refined fertilizers such as bone meal, poultry manure and decomposed manure fertilizer. Expanding the hole to excavate the heart and soil can cover the surface. The amount of material required to change the soil, generally about 25-50 kg of dry straw, 1 kg of lime, 1.0-1.5 kg of superphosphate or calcium magnesium phosphate, 50-100 kg of soil mixed fertilizer or humus soil per cubic meter, and livestock manure 20-40 kg.
Second, supplement body fat: Complement body fat is combined with expansion points to improve soil. Mainly to supplement the tree nutrition, promote flower bud differentiation, and control the growth of fruit tips. The fertilization time is usually applied immediately after fruit picking, with a depth of 30 ,. Apply as deep as possible. Each application of 1.0-1.5 kg of calcium phosphate, 0.05 kg of borax, and 0.05 kg of carbofuran. Note that urea, ammonium bicarbonate, and other nitrogen fertilizers cannot be applied at this time. Treatment of Complementary Fertilizer: Before the “White Dew”, the livestock and poultry will be transported to the top of the mountain, where they will be put to maturity, covered with plastic membranes to prevent rain, fully cooked, and mixed with superphosphate and borax after fruit picking. Carbofuran is sprinkled on the topsoil 15? deep.
Third, reasonable pruning: pruning in winter is to promote the differentiation and sprouting of the clipped buds, promote growth, strengthen the apical dominance, reduce the branches. Winter pruning starts from the fallen leaves of the tree and ends in the spring before germination. Winter pruning generally uses a short cut, sparse, and retracted method. In addition to the object before the pest dead branches, overlapping branches, weak branches, dense branches, slender branches, male flower branches.
Fourth, do a good job in clear garden management: In conjunction with the above work, do a good job Chestnut Park Qingyuan. The first weeding was to burn the dead branches, fallen leaves, fallen fruits, and fruit trees. Then it is painted white to achieve the purpose of eliminating the source of disease and insects. The painted white chestnut tree is 80 feet high and the whitening agent is formulated as 10 kilograms of water, 2.5 kilograms of quick lime, 0.25 kilograms of sulfur, and 0.25 kilograms of salt.

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