Fertilizer Requirements During the growing period of kidney bean, more potassium fertilizer and nitrogen fertilizer were absorbed, followed by phosphate fertilizer. Each 1,000 kg of kidney beans produced required 3.37 kg of nitrogen, 2.26 kg of phosphorus and 5.93 kg of potassium. In addition, proper application of boron, molybdenum and other trace elements also promote the growth and development of the plant. The amount of fertilizer per acre for the whole growing period of kidney bean is 2500-3000 kg for farmyard fertilizer (or 350-400 kg for commercial organic fertilizer), 8-10 kg for nitrogen fertilizer (N), 5-6 kg for phosphorus fertilizer (P2O5), and 9-9 kg for potassium fertilizer (K2O). 11 kg. Organic fertilizer was used as base fertilizer, nitrogen and potassium fertilizers were used as base fertilizers, and two fertilizers were used. Phosphate fertilizers were all used as base fertilizers. Fertilizer and farmyard fertilizer (or commodity organic fertilizer) are mixed and applied. In general medium fertility field, the target yield per mu is 1500-2000 kg. Basic application and recovery fertilizer application can be carried out according to the following scheme. Low fertility fields are slightly increased on this basis, and high fertility fields are appropriately reduced.
Basal fertilizer is generally medium-fertilizer field, and the target yield is 1500-2000 kg per mu, which can be used for 2500-3000 kg of farmyard fertilizer (or 350-400 kg of commodity organic fertilizer), 3-4 kg of urea, 11- 13 kg of diammonium phosphate, and potassium sulfate. 6 to 8 kg.
Fertilizer manure application of urea per acre 6 to 9 kg, 4 to 6 kg of potassium sulfate; flowering and sorghum period of 5 to 7 kg of urea per acre, potassium sulfate 4 to 6 kg.
Outside the roots, the top dressing is in the blooming stage, and 0.3 to 0.4% of potassium dihydrogen phosphate or trace element fertilizer is sprayed on the foliage for 3 to 4 times, and applied every 7 to 10 days. The cultivation of facilities can be supplemented with carbon dioxide gas fertilizer.
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