Management method of planting alfalfa
Most of the geranium plantings were carried out before the germination in early March. Although the requirements for soil are not strict, the selection of planting land should be emphasized. It is best to have a flat ground or water source with a low groundwater level and a sloping land with good irrigation conditions. The drainage is good, the soil is loose, and the soil layer is deep. Newly opened wasteland must be fully weathered or organic fertilizer applied to increase its organic matter content. The land should be leveled, because the ability of tillering and weeding is strong, and the row spacing must be 40 to 50 cm when planting. Digging holes for planting, the triangle is a triangle, planted 3 to 5 strains. Planting should not be too deep or too shallow, too deep and slow, too shallow, although it is fast, but more growth and thin. Generally, the depth of the planting hole is more than 30 cm, and the base fertilizer is applied to the ground 15 to 20 cm. After the planting, the soil is compacted. The seedlings are applied with 500 to 600 kg of water per person per mu to ensure the survival rate.
The long-term flowering period of fertilization of large flowers and sorghum has a relatively large demand for nitrogen, phosphorus and potassium. In addition to the application of base fertilizer (suitable for decomposed cow dung or pig manure), it is also necessary to fertilize according to the needs of different developmental stages. When nitrogen is sufficient, the plant can be promoted to grow vigorously and the leaves are enlarged. Phosphorus can promote root growth, enhance tillering ability, facilitate the transfer from vegetative growth to reproductive growth, enhance the ability of buds, and promote drought resistance, cold resistance, disease resistance and quality. When the potassium supply is sufficient, the plant tissue is tough, strong and strong, and has strong disease resistance. In the middle and late period, the flower buds can be tidy and thick, the flower buds are developed and the buds are enhanced. Therefore, before and during flowering, it is necessary to topdress twice, and each time fertilize with quick-acting fertilizer.
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