大豆高产综合农艺措施的产量优化研究

THE YIELD FUNCTION MODEL OF COMPRE—HENSIVE CULTURAL PRACTICES FOR SOYBEAN HIGH YIELD

试验采用二次回归正交旋转组合设计的分析方法,研究了大豆“长农4号”不同的农艺措施组合与产量的关系。结果表明,种植密度对大豆产量影响最大,其次是氮肥、磷肥、钾肥作用不大。获得亩产150公斤以上的大豆产量,其栽培措施为:密度1万株/公顷,亩施尿素5.5～6.0公斤,三料磷9.5～10公斤,氯化钾3公斤。

The relations of grain yield with different agricultural practice composit ion for 'Chang-Nong No. 4' c. v. were studied by using second-degree polynomial regression analysis and orthogonal rotation design. Experimental results Showed that plant density was a vital agricultural factor for soybean high yield. Application of nitrogen fertilizer and Phosphoric fertilizer were importent for further high yield. However, the potassium fertilizer worked less. yield of 150kg/mu or more would be obtained by means of plant density 10000 Plant/A, with appling urea 5.5～6.0kg/mu, Phosphoric fertilizer 9.5～10kg/mu and potassium fertilizer 3 kg/mu.