【摘要】 在江苏省淮南、淮北地区设置小麦不同播种期、密度及肥料比例试验 ,研究小麦高产群体叶面积的质量特征。研究结果表明 ,进一步提高小麦产量必须在群体数量的基础上优化群体质量 ,即在形成适宜群体叶面积的前提下 ,提高有效叶面积率、高效叶面积率及单位叶面积承载籽粒能力。指出优化小麦群体质量的关键技术途径是科学确定适宜基本苗数、合理利用分蘖和改进肥料运筹。更多还原

【Abstract】 Experiments on different sowing dates,planting density and fertilizer proportion of wheat were done in the South and North part of Huaihe River in Jiangsu Province.Results showed that to further increase wheat yield,population quality must be optimized on the base of population quantity,that was to say effective leaf area percentage,high effcient leaf area percentage and grain capacity in unit area must be increased on the base of appropriate population leaf area.The key techniques were to make sure the proper basic seedling no.,to utilize tillers reasonably and to improve fertilizer application.更多还原