Fertilizer management after early pear harvesting
The pear tree undergoes a nutrient consumption during the growing season. After harvesting the fruit, the tree has gradually weakened and entered an important period of nutrient accumulation. In order to ensure that the pear tree is not weak, prevent the occurrence of pests and diseases of pear trees and cause early defoliation and secondary flowering, the management of fertilizer and water after harvesting can not be relaxed to ensure the normal flowering results of pear trees in the coming year.
The pear consumes a lot of nutrients in the fruiting period, and it is urgent to supplement the nutrients after harvesting the fruit to restore the tree potential. At the same time, the roots of pear trees enter the second growth peak from August to November. At this time, the base fertilizer should be applied early, which is beneficial to the rapid decomposition of fertilizers and to the new roots to absorb and store nutrients. The base fertilizer should be based on organic fertilizer, and appropriate amount of nitrogen, phosphorus and potassium quick-acting fertilizer should be added. The amount of fertilizer should be determined by combining the tree potential and the result amount. The application amount of the base fertilizer should account for 40% of the annual fertilization amount. Generally, 1,500 to 3,000 kilograms of manure, human excrement, poultry waste or decomposed wheat bran, wheat straw, weeds and other organic fertilizers are applied per mu, and 40-50 kg of NPK fertilizer is mixed. Method: Dig into the ditch about 1 meter from the trunk, the tree can be close to a little; the fertilization ditch is about 40 cm deep, about 30 cm wide, and shallow inside and outside. After fertilization, mix well with the backfilled soil to avoid burning roots due to accumulation of fertilizer. At the same time, root dressing can be carried out. In September-October, a root dressing is applied to the pear orchard, and 0.1%-0.3% urea plus 0.3%-0.5% potassium dihydrogen phosphate mixture can be sprayed. After morning and evening dew, the leaves are sprayed, avoiding noon. High-humidity spray to avoid harm.
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