【摘要】 运用二次回归旋转组合设计 ,对优质两系稻两优 2 1 86头季稻进行移栽叶龄、插植密度、施 N、P、K肥量5项农艺措施研究 ,建立头季稻、再生稻产量与 5项农艺措施的回归模型 ,分析了农艺措施对两季产量的影响。结果表明 ,影响头季稻产量的主要因素是叶龄、施 N量、施 P量和施 K量 ;影响再生稻产量的主要是叶龄、密度和施 N量 ,同时因素间的互作对再生稻产量也有影响更多还原

【Abstract】 A comprehensive culture techniques for first seasonal rice of fine grain quality tow line hybrid rice liangyou 2186 was studied by the method of quadratic second order regression rotation design.Five influential elements for culture techniques were leaf age in transplanting (x 1),planting density (x 2),quantities of nitrogen (x 3),phosphorus (x 4) and potassium (x 5).The regression models of five elements with yield of first seasonal rice and ratoon rice were established.The effects of agronomic practices on yield of first seasonal rice and ratoon rice were analysed.The results showed that main agronomic practices for yield of first seasonal rice were leaf age,amount of nitrogen,phosphorus and potassium,and those for yield of ratoon rice were leaf age,plant density and nitrogen amount.There are also the interactive effects on yield of ratoon rice.更多还原