The key to increasing the application of phosphate fertilizer in the chestnut garden in autumn and winter
According to the experiment of the Zhejiang Forestry Bureau, in the winter, the chestnut trees were planted with large holes in the phosphate fertilizer, and 0.2 kg of phosphate fertilizer was applied per hole, and 20-25 kg of decomposed bar fertilizer was planted. After backfilling the topsoil, it can ensure the storage of phosphorus in the chestnut trees. The annual seedling rate of the experimental forest is 98%, and the yield is more than 5 times higher than that of the control forest. Studies have shown that phosphorus can increase the viability of the chestnut body, promote tissue maturity, and enrich the branches.
In particular, the development of flowers requires the most phosphorus, while the differentiation of female flowers requires phosphorus. If the phosphorus is insufficient, it will form an open space, which is 30% lighter and more than 70% in severe cases. Soil sample analysis showed that when the available phosphorus content in the soil was 45-55 mg/kg, the emptying rate of chestnut could be controlled below 5%. Therefore, in the transformation of low-yield chestnut trees in autumn and winter, we must not neglect to increase the application of phosphate fertilizer, which is an important basis and prerequisite for high yield in the coming year. Phosphate fertilizer is added in autumn and winter, mainly in the rhizosphere soil of chestnut trees. The method is to combine the garden soil transformation, and adopt the method of strip application or hole application near the root group to concentrate the inorganic phosphate fertilizer such as superphosphate, ammonium phosphate, calcium magnesium phosphate and the like. The amount of application varies from tree to tree, and as a result, large trees can be applied as appropriate, and small trees can be reduced as appropriate. According to the test, if the phosphate fertilizer is mixed with the decomposed compost or manure, the fertilizer efficiency can be increased by 30% to 40%. If the soil is not applied to phosphorus in autumn and winter, the solution is to spray phosphorus outside the roots during the growing season. Generally, a mixed fertilizer solution prepared by using potassium dihydrogen phosphate, boric acid, urea or zinc sulfate at a concentration of 0.3%, or a mixture of 0.3% potassium dihydrogen phosphate and 0.3% borax plus 0.5% urea is used. Foliar spraying was carried out during the chestnut leafing stage, flowering stage, full flowering stage and young fruit expansion period. The spray site is preferably leaf back and young leaves, and the time is sunny or cloudy morning or evening. If single-spraying of calcium phosphate, the super-calcium phosphate may be firstly immersed in water and stirred for several times, and left for 24 hours, and the clear liquid is prepared to be sprayed with a solution having a concentration of 1% to 2%.
In particular, the development of flowers requires the most phosphorus, while the differentiation of female flowers requires phosphorus. If the phosphorus is insufficient, it will form an open space, which is 30% lighter and more than 70% in severe cases. Soil sample analysis showed that when the available phosphorus content in the soil was 45-55 mg/kg, the emptying rate of chestnut could be controlled below 5%. Therefore, in the transformation of low-yield chestnut trees in autumn and winter, we must not neglect to increase the application of phosphate fertilizer, which is an important basis and prerequisite for high yield in the coming year. Phosphate fertilizer is added in autumn and winter, mainly in the rhizosphere soil of chestnut trees. The method is to combine the garden soil transformation, and adopt the method of strip application or hole application near the root group to concentrate the inorganic phosphate fertilizer such as superphosphate, ammonium phosphate, calcium magnesium phosphate and the like. The amount of application varies from tree to tree, and as a result, large trees can be applied as appropriate, and small trees can be reduced as appropriate. According to the test, if the phosphate fertilizer is mixed with the decomposed compost or manure, the fertilizer efficiency can be increased by 30% to 40%. If the soil is not applied to phosphorus in autumn and winter, the solution is to spray phosphorus outside the roots during the growing season. Generally, a mixed fertilizer solution prepared by using potassium dihydrogen phosphate, boric acid, urea or zinc sulfate at a concentration of 0.3%, or a mixture of 0.3% potassium dihydrogen phosphate and 0.3% borax plus 0.5% urea is used. Foliar spraying was carried out during the chestnut leafing stage, flowering stage, full flowering stage and young fruit expansion period. The spray site is preferably leaf back and young leaves, and the time is sunny or cloudy morning or evening. If single-spraying of calcium phosphate, the super-calcium phosphate may be firstly immersed in water and stirred for several times, and left for 24 hours, and the clear liquid is prepared to be sprayed with a solution having a concentration of 1% to 2%.
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