The amount of fertilizer used in Taoyuan varies greatly. For example, the amount of fertilizer, the ratio of N, P, and K, the time and method of fertilization are unreasonable, and the coordination effects of fertilization and irrigation are neglected. In the soil where the soil is alkaline, there is a tendency of copper deficiency, such as leaf white, branches dry, and flow plastic.
Principles of fertilization: Strengthen the proportion of organic fertilizer application, based on the soil fertility and early and late maturing varieties and yield levels, and reasonably regulate the level of NPK fertilizer application, pay attention to the combined application of calcium, magnesium, boron and zinc or copper fertilizer.
Different types of spring topdressing period should be different. Early-maturing varieties are earlier than the later-maturing varieties. The main focus of fertilizer application is autumn basal fertilizer, and the number of top dressings in spring is less than that of late-maturing varieties.
In combination with high-quality cultivation techniques, in the plain areas that are prone to haze in summer, attention should be paid to the combination of ridging, mulching, or weeding in orchards; in dry areas, surface cover and hole-storage fertilizer and water technologies are advocated.
Fertilizer amount and proportion: Organic fertilizer application amount: Early-maturing varieties, or fertile soil, or small age, or strong tree orchard Mushi organic fertilizer 1 to 2 square; Late-maturing varieties, soil barren, old age, weak tree orchard Application of organic fertilizer 2 to 4 square.
Fertilizer application amount: Taoyuan with a yield level of 1,500 kg: 10 to 12 kg of nitrogen fertilizer (per acre, purified, the same below), 5 to 8 kg of phosphate fertilizer, and 12 to 15 kg of potassium fertilizer; Taoyuan, a production level of 2000 kg: nitrogen fertilizer 15 to 18 Kilograms, 7 to 10 kg of phosphate fertilizer, 17 to 20 kg of potash, and 3,000 kg of peach orchard, yield 18 to 20 kg of nitrogen fertilizer, 10 to 12 kg of phosphate fertilizer, and 20 to 23 kg of potassium fertilizer.
Fertilization method: All organic fertilizers were used as basal fertilizers after soil thawing in autumn or spring. 50% of the phosphate and potassium fertilizers and 40% of the nitrogen fertilizers were applied together with the organic fertilizers. The other N, P and K fertilizers were top-dressed in accordance with the nutrient requirements during the growth period; the chemical fertilizers were generally used in the budding stage of peach (early March) and the hard nuclear stage (5 In the middle of the month, 2 and 3 times (two times for early-maturing varieties and 3 for late-maturing varieties) were applied during fruit enlargement. This place needs to separate the fertilization ratio of early and late-maturing varieties. In mid-May, it is the hard-core stage of late-maturing varieties.
In the orchards of early deciduous or excessively high loads in the previous year, extra-root fertilizer should be intensified. Before germination, 2-3% of urea can be sprayed 2-3 times. After germination, until mid-July, every 7 days. , The ratio of urea and potassium dihydrogen phosphate was sprayed twice, and the concentration was 0.3% to 0.5%. If in the previous year peach leaves were found to have symptoms such as leaf white, branches dry, and flow gum, 0.01% to 0.03% copper sulfate solution could be sprayed in the bud of peach.
If the application of organic fertilizer is more, the nitrogen and potassium fertilizers in autumn can be reduced as much as 1 to 2 kilograms as appropriate; if the applied organic manure is pig manure, even if the previous years peach trees have symptoms such as leaf white, branches dry, flow plastic, etc. It is no longer necessary to spray copper sulfate.
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