According to the law of fertilizer demand, the use of basal fertilizers from the experience of planting apple trees in the past, from September to October each year is the key period of apple tree fertilization, mainly organic fertilizer. The commonly used organic fertilizers include green manure, human waste, manure, compost, manure, methane fertilizer and waste fertilizer. Organic fertilizer can provide nutrients to crops sustainably and in a balanced manner, thereby significantly improving the quality of crops. Therefore, fertilizers must be applied in conjunction with organic fertilizers. The amount of organic fertilizer applied to mature orchards should reach 45,000 kg/ha or more, or the production standard of “pound and weigh fruit†should be calculated according to the output.
The topdressing of soil dressing soils is usually carried out during the growth period. This period usually uses high-nitrogen and low-phosphorus fertilizer combinations for top dressing. However, the number of specific fertilizers depends on the specific conditions. The main purpose of topdressing fruit during rapid expansion is to promote fruit coloration and increase sugar content of fruit, which also has good effects on flower bud differentiation and branch thickening. Phosphate and potash fertilizers are the main fertilizers for this fertilizer, and 1 to 1.5 kg of compound fertilizer is applied to the strain.
During the various stages of planting apple trees, the fruit trees will be affected by insufficient fertility and produce lesions, which will ultimately affect the overall quality and yield of the fruit. Therefore, we can use the root dressing method to solve the disease caused by insufficient nutrients at this stage. The young fruit growth stage is that the nutritional supplement of the apple tree is focused on calcium supplementation, and the heavy calcium may be used together with Gales 600 times solution or calcium lactate 600 times solution and continuously sprayed two or three times. After the fruit is bagged, each fruit can be added with 400-fold solution of fruit nutrient amino acid. After that, it can be used alternately according to the actual growth of fruit trees, using fruity amino acids for a long time and Pu Dejin.
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