The nitrate content of legumes is slightly higher than that of melons, but it is much lower than that of leafy vegetables. Generally, it does not exceed 400 μg/g. Therefore, the application of legume fertilizers should aim at increasing yield.
1. In the early stage of germination of the bean-based fertilizer crop, the energy source for the growth of the young shoots mainly depends on the nutrients stored in the cotyledons, and the other leaves are unfolded, and the leaf area is rapidly expanded to exert photosynthesis function, and the rhizobium nitrogen fixation effect, so the legume vegetables It is advisable to use slow-acting compost, manure and soil fertilizers. It is not advisable to use too much nitrogen fertilizer as seed fertilizer to prevent rotten species. However, the application of a certain amount of seed fertilizer can promote root development and nodule growth, which is conducive to early growth and strong seedlings. Generally, 1000-1500 kg of manure fertilizer is used, or 2000 kg of waste fertilizer plus 15 kg of formula fertilizer or 25-40 kg of Kangbao fertilizer. Add 15-20 kg of potassium chloride or 100 kg of ash, and mix 15-25 kg of superphosphate. Generally, the depth of application is 8-10 cm, and the seed is 6-8 cm.
Second, the roots of topdressing bean crops need to be medium-fat, according to the principle of “basic fertilizer and supplemented by topdressingâ€. When the crop enters the vegetative growth and reproductive growth period, it needs more nutrients, and the root dressing is carried out in an appropriate amount at an appropriate time, which has obvious effect of increasing yield. Do not topdress on rainy days, and each time the topdressing is carried out on a sunny day. When the seedlings are thin, the nitrogen fertilizer is applied, and the concentration is appropriately increased with the growth of the plant. Generally, 20-25 kg of formula fertilizer or 20 kg of compound fertilizer is applied.
Third, the external top dressing is generally carried out in the full flowering period and the final flowering period, and the leaching solution such as urea, ammonium sulfate or superphosphate can be used for foliar spraying. The dosage per acre is 1-2 kg of urea, 7-10 kg of ammonium sulfate, 75-100 kg of potassium dihydrogen phosphate, and 40-50 kg of water.
1. In the early stage of germination of the bean-based fertilizer crop, the energy source for the growth of the young shoots mainly depends on the nutrients stored in the cotyledons, and the other leaves are unfolded, and the leaf area is rapidly expanded to exert photosynthesis function, and the rhizobium nitrogen fixation effect, so the legume vegetables It is advisable to use slow-acting compost, manure and soil fertilizers. It is not advisable to use too much nitrogen fertilizer as seed fertilizer to prevent rotten species. However, the application of a certain amount of seed fertilizer can promote root development and nodule growth, which is conducive to early growth and strong seedlings. Generally, 1000-1500 kg of manure fertilizer is used, or 2000 kg of waste fertilizer plus 15 kg of formula fertilizer or 25-40 kg of Kangbao fertilizer. Add 15-20 kg of potassium chloride or 100 kg of ash, and mix 15-25 kg of superphosphate. Generally, the depth of application is 8-10 cm, and the seed is 6-8 cm.
Second, the roots of topdressing bean crops need to be medium-fat, according to the principle of “basic fertilizer and supplemented by topdressingâ€. When the crop enters the vegetative growth and reproductive growth period, it needs more nutrients, and the root dressing is carried out in an appropriate amount at an appropriate time, which has obvious effect of increasing yield. Do not topdress on rainy days, and each time the topdressing is carried out on a sunny day. When the seedlings are thin, the nitrogen fertilizer is applied, and the concentration is appropriately increased with the growth of the plant. Generally, 20-25 kg of formula fertilizer or 20 kg of compound fertilizer is applied.
Third, the external top dressing is generally carried out in the full flowering period and the final flowering period, and the leaching solution such as urea, ammonium sulfate or superphosphate can be used for foliar spraying. The dosage per acre is 1-2 kg of urea, 7-10 kg of ammonium sulfate, 75-100 kg of potassium dihydrogen phosphate, and 40-50 kg of water.
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