一、播前准备1.地块选择选择土壤肥力较高、土层深厚、团粒结构良好的地块。土壤速效养分含量丰富,才能持续均衡地供给养分,保证小麦生长期内部脱肥、不早衰,正常成熟。高产攻关实验表明,超高产田土质以中壤为最好,两米土层内没有过沙过黏的层次。土壤肥力指标是土壤有机质含量达到1.3%以上,碱解氮90毫克/千克,速效磷27毫克/千克,速效钾110毫克/千克防止后期。土质过于黏重的地块,适耕 A preparation before sowing 1. Plot selection Select the higher soil fertility, deep soil, the aggregate structure of good land. Soil available nutrient content is rich, in order to supply nutrients sustainably and evenly, to ensure the internal growth of wheat during fattening, premature aging, normal maturation. High-yield key research shows that the super high yielding soil is the best medium-sized soil, two meters of soil has not been too sticky level of sand. Soil fertility indicators soil organic matter content of 1.3% or more, alkali hydrolysis of nitrogen 90 mg / kg, available phosphorus 27 mg / kg, available potassium 110 mg / kg to prevent late. Soil is too sticky plots, suitable for farming