First, the existing problems and fertilization principles Taoyuan fertilizer for a large difference in fertilizer, fertilizer dosage, NPK ratio, fertilization time and method is not reasonable and other issues, put forward the following principles of fertilization: 1. Strengthen the proportion of organic fertilizer, based on soil fertility Early and late maturing varieties and yield levels, reasonable regulation of NPK fertilizer application levels, pay attention to the combined application of calcium, magnesium, boron and zinc; 2. Different varieties of spring dressing period should be different, early maturing varieties compared to late-maturing varieties early dressing, top dressing The number of times is small; 3. In combination with high-quality cultivation techniques, in the plain areas that are prone to damage in summer, ridging, filming, and other soil management work are required; in dry areas, the use of plastic film covering, hole storage and fertilizer technology is advocated.
Second, pick the tree fertilization recommended early maturing varieties, fertile soil orchards, peach trees with small age or strong tree vigor, the annual average of 1-2 organic fertilizer per acre or human waste, biogas slurry 1500-2500 kg; late maturing varieties Poorly soiled orchards, peach trees with large trees or weak trees are applied with 2-3 parts of organic fertilizer or human excrement, 2000-3000 kg of biogas slurry.
1. Taoyuan with a target output of 3,000 kg/mu, applying nitrogen fertilizer (N) 12-18 kg/mu, phosphate fertilizer (P205) 10-12 kg/mu, potassium fertilizer (K20) 20-26 kg/mu;
2. The target output is 2000 kg/mu Taoyuan, apply nitrogen fertilizer (N) 10-15 kg/mu, phosphate fertilizer (P205) 7-10 kg/mu, potassium fertilizer (K20) 17-20 kg/mu;
3. Taoyuan, which has a target output of 1500 kg/mu, applies 9-12 kg/mu of nitrogen fertilizer (N), 5-8 kg/mu of phosphate fertilizer (P205), and 12-15 kg/mu of potassium fertilizer (K20).
All organic fertilizers as the basal fertilizer are best applied in the fall from September to October, followed by the application of soil thawing in the spring, using the method of application on the ditch, human fecal urine and biogas slurry as top dressing 5-6 times. 40% of the N and K fertilizers and 50% of the P fertilizers are also applied together. The rest of the N, P, and K fertilizers are top-dressed in accordance with the nutrient requirements during the growth period; chemical fertilizers are generally applied during the germination (early March) of peach trees, during hard-nucleation, or during flower bud physiological differentiation. The period (mid-May to late June) and fruit enlargement period were 2-3 times (2 for early-maturing varieties and 3 for late-maturing varieties). For early spring defoliation or excessively loaded spring parks, extra-root fertilizers should be strengthened. 2-3% urea can be sprayed 2-3 times before sprouting. After germination to mid-July, every 7 days. Secondly, the spraying ratio of urea and potassium dihydrogen phosphate was twice, and the concentration was 0.3%-0.5%. If the application of organic fertilizer is relatively large, the nitrogen and potassium fertilizers in autumnal base application can be reduced by 2-4 kg/mu, as appropriate.
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