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一、影响一播全苗的因素1.种子发芽率低、播种量少。国家规定的玉米种子发芽率标准为85%,许多优秀种子企业生产的种子发芽率在95%以上。使用符合国家质量标准的优良种子,发芽出苗快而齐。但有个别品种在个别年份,由于受收获时气候因素和贮藏条件的影响,种子发芽率降低;还有贮藏年限较长的陈种子,由于种子在贮藏过程中呼吸消耗量大,种子生命力减弱。使用这样的种
First, the impact of a whole plant seedlings 1. Seed germination rate is low, less seeding. The germination rate of corn seeds stipulated by the state is 85%, and the seed germination rate of many excellent seeds enterprises is over 95%. The use of good quality seeds in line with national standards, germination quick and homogeneous germination. However, in a few years, seed germination rate decreased due to the climatic and storage conditions of individual varieties. In addition, Chen seeds with longer shelf-life were harvested due to the high consumption of respiration during storage and the weaker seed vitality. Use this kind of