1  Nutritional characteristics of legumes.
     Bean vegetables include kidney beans, cowpeas, edamame ( vegetable soybeans ) , peas, broad beans, etc., served with tender pods or tender bean seeds. Legumes divided into two types: one is the trailing bean represented indeterminate, such as cowpea, peas, lentils; then to dwarf bean represented limited growth form, such as dwarf beans, peas, beans Wait. However, all legumes still have commonalities in nutrition and fertilization: 1 In the absorption of nitrogen, phosphorus and potassium nutrients, legumes have lower requirements for nitrogen, higher demand for phosphorus, and lower demand for potassium. 2 Because Rhizobium is a kind of aerobic bacteria, by adding organic fertilizers to improve soil aeration, it can create favorable conditions for the growth and reproduction of Rhizobium . Three rhizobia are particularly sensitive to phosphorus, and phosphate fertilizer has a significant yield-increasing effect. 4 The abundance and deficiency of calcium and magnesium have a profound impact on plant growth and pod development.
2 Â Formulated fertilization technology for infinitely growing legumes.
    Infinitely growing legumes are crops that are vegetatively grown and reproductively grown. The growth period is longer, the pods are harvested many times, the nodules are underdeveloped, and the nitrogen fixation capacity is weak, so the soil conditions are high. For peas, produce 1 ton of product, need to absorb nitrogen 16. 5kg , phosphorus 13 . 75kg , potassium 14 . 46kg nitrogen: phosphorus: potassium = 1 : 0 . 83 : 0 . 88, the ratio of phosphorus significantly increased demand, and the need potassium ratio decreased.
  In fertilization, first emphasize the application of base fertilizer, and mainly based on organic fertilizer, with a small amount of chemical fertilizer, such as pea before planting generally 666 . 7 square meters of organic fertilizer 2500 ~ 3000kg ; which added 20 ~ 25kg of superphosphate , 10 ~ 15kg of ammonium nitrate , 15 ~ 20kg of potassium chloride , organic fertilizer, fertilizer mixed and mixed into the soil layer. Followed by timely and appropriate dressing, small amounts of dressing seedling amount of available nitrogen and phosphorus fertilizer; after the start of harvest, to timely nitrogen fertilizer, in order to ease the contradiction growth of leaves and pod growth.
3 Â Formulated fertilization technology for finitely grown legumes.
    The finite growth type of legumes is the first to form vegetative bodies and then form the genitals. The pods are harvested at one time, the root nodules are developed, and the soil fertility is not high. Initial growth, to promote root development and early seedling pumping zoning sticks, as soon as possible to recover nitrogen fertilizer, phosphate fertilizer, but not excessive, so as not to inhibit nodule formation, resulting in stems, leaves soaring. Flowering and pod-forming period is the peak of nutrient uptake by plants. It should ensure that the plants absorb enough nitrogen, phosphorus and potassium nutrients to avoid falling and falling pods. Information on Japan Iwayuan (1969) . For every 1 ton of product, beans to absorb nitrogen 10. 2kg , phosphorus 10 . 08kg ,  Potassium 11.68kg . N: P2O5: K2O = 1: 0.991.14; white outline Yi et al. (1986) described the data, to produce 1 ton bean product, 3-fluoro be absorbed. 37kg , phosphorus 2 . 2okg , potassium 5 . 90kg .
  In fertilization, the base fertilizer is best mixed with organic fertilizer, phosphorus and potassium fertilizer, and the amount of base fertilizer is generally 666 . 7 m2 administered composting manure or farmyard manure 500 ~ 1000kg 1500 ~ 2000kg, and mixed into the SSP 15 ~ 20kg, potassium chloride 10kg, basal deeper facilities, fertilizing or banding can be employed. Dressing should be separately at the seedling stage, flowering and fruiting of conduct, not fertile soil fertilizers, as the seedlings grow dwarfed, Ye dark color, may be appropriate nitrogen fertilizer to promote seedling growth; flower bud differentiation of more fertilizer requirement, Axillary topdressing small amount of nitrogen can promote the differentiation and growth of branches; flowering pod of taking root outer spraying fertilizer, grain conducive to full saturation and increased oil content per 666. 7 square meters are sprayed with 2 to 4 kg of superphosphate and 100 kg of water .  Whether early or late in the growth, nitrogen fertilizer were not too much, so as not to cause lodging and impact of nodule growth. Trace element fertilizers are mostly sprayed outside the flowering stage, every 666 . 7 m2 borax or copper sulfate, zinc sulfate, manganese sulfate O. 1 ~ O . 2kg to water 1 . 00kg spray; molybdenum fertilizer can be used as seed dressing, every 666 . 7 m2, dry mix after sowing with an aqueous solution of 20 ~ sQ g of ammonium molybdate seed dressing child.
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