沿江地区后季稻塑盘旱育抛栽综合技术数学模式研究

根据农业系统工程原理 ,采用D 饱和最优回归设计方法 ,研究了长江下游沿江地区多熟制后季稻塑盘旱育抛秧栽培种植方式的生产潜力和技术优化问题 ,建立了产量函数数学模型。结果表明 :后季稻塑盘旱育抛栽综合技术措施的最大生产潜力为 930 3.75kg/hm2 ;产量 7875kg/hm2 以上的农艺组合为 :大田基本苗 2 32 .0 5万～ 2 6 1.15万苗 /hm2 ,氮肥施用量 (纯N)为2 33 .5 5～ 2 6 8.95kg/hm2 ,穗肥占总氮比为 9.6 4%～ 15 .12 %。在设计的大田基本苗 12 0万～ 30 0万苗 /hm2 、氮肥施用量 (纯N) 15 0～ 36 0kg/hm2 、穗肥占总氮比为 0～ 30 %的试验范围内 ,对其产量影响的程度依次为基本苗 >穗肥占总氮比 >施氮量

Study on Mathematic Model of the Integrated Technology in Late-season Rice Growth

According to the principle of agricultural systemic engineering, the production potential and technical renew for late season rice growth through the tossing along low Yangtze River region were studied with the method of regress and mathematic model of rice yield was set up. The result indicated the rice yield potential was 9303.75kg/hm2 in the area and the integrated agronomic characters for rice yield of 9303.75kg/hm2 were as follows: 2.3-2.6 million seedling per hm2, 233.55-268.95kg pure nitrogen fertilizer per hm2, among which 9.64%～15.12% was used in heading stage. In the model, the order of factors affecting rice yield was basic seedling number > the rate of nitrogen fertilizer in heading stage to total nitrogen > total N-fertilizer.