Due to climatic reasons and improper cultivation measures, a large number of early leaves of pear trees occur from time to time. Early leaves can weaken the tree, affect fruit development, reduce fruit yield and quality, and cause great economic losses to fruit farmers. To prevent and control early defoliation of pear trees, we must grasp the following five points: After the application of organic fertilizer in autumn, the organic fertilizer is applied early, and appropriate nitrogen, phosphate and trace element fertilizers (calcium, zinc, iron fertilizer, etc.) are mixed to effectively improve the fertilizer utilization rate. Organic fertilizer must be applied consistently for years to be able to function well, to improve soil, increase organic matter, and prevent tree debilitation. When the height of the tree structure is densely planted, the branches are crowded and the leaves are overlapped and shaded, the effective area of ​​the leaves is reduced, the photosynthesis is blocked, the assimilation and assimilation of the leaves are reduced, and the petiole is wilted or the leaves become yellow. Through reasonable planting, reasonable pruning, reasonable load and other measures, the ventilated and light-transmissive tree structure can be established to improve the utilization of light energy and reduce defoliation. At the same time, the micro-climate of ventilation and light transmission can make the tree self-regulating, self-relieving and self-releasing in the adverse environment of high temperature, rain and humidity, so as to reduce the damage to the tree. Balanced orchard water orchard should be done with small water and water, to prevent flooding of large water, especially to avoid flooding at high temperature, and at the same time pay attention to drainage in low-lying areas to prevent water accumulation. After the rain or after irrigation, the soil should be drained in time to keep the soil on the ground: the upper part is loose, which is conducive to the decomposition of ventilation, water seepage and nutrients. The lower layer of soil is slightly tight, which can keep water and fertilizer. The drug investigation found that the defoliation of the orchard using copper preparation and naphthalene acetic acid was relatively light. Fruit farmers can spray 1:1:200-250 times Bordeaux mixture 1 or 2 times in June, paying attention to avoid rainy days and dew days. In addition, spraying 25,000 to 30,000 times of acetic acid to the leaves 45 days before harvesting, spraying once every 15 days, spraying 2 to 3 times, can also effectively reduce the occurrence of defoliation. Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone Water Soluble Kiwi Fruit Powder,Kiwi powder food grade,Indian Ginseng Extract Fufeng Sinuote Biotechnology Co.,Ltd. , https://www.ffsinuoteplant.com
Orchard grass, grass and grass cultivation can fertilize the soil, adjust the field microclimate, reduce leaves. It is recommended to plant clover, alfalfa, ryegrass, etc., or use the grass naturally growing in the orchard. When the grass height exceeds 30 cm, cut it once and cover the grass on the tree plate. Cut 3 to 4 times a year. In the fall, the soil is combined with the base fertilizer for 1 time, or the ditch is cut between the rows of orchards, and the grass is turned into the soil. It is best to use less or no herbicide. If herbicides are used, they should be used before May to avoid high temperature in summer.