东北半干旱区大豆水肥耦合效应盆栽试验研究

为了探讨大豆产量与水肥的关系,采用氮(N)、磷(P)、钾(K)、土壤含水量(W)四因子五水平二次回归设计,于2004年在黑龙江省西部半干旱区甘南县开展了大豆水肥与产量效应的田间试验研究。结果表明:各因素对大豆产量均有影响,其中水分对产量的作用最大,其次是氮、钾、磷。从水分生产函数的角度,平均产量随着灌水量的增加而提高,但是当灌水量达到980 mm时,产量没有提高反而下降。水肥交互耦合效应大小顺序是:N和W>N和P>K和W>P和W>P和K>N和K,其中N和W、N和P的交互作用比较显著,其余的交互作用影响效果不明显。

Effect of water and fertilizer coupling on soybean yield in northeast semi-arid areas

To seek for the relationships between soybean yield and water and fertilizer coupling,with three factors and five grades regression design,field experiments were conducted in the northeast during 2004.Results showed that the soybean yield was affected by every factor,irrigation quantity was the main one,and the next was nitrogen quantity,potash quantity and phosphorus quantity.From water production function,average yield increased with quantity of irrigation,when it amounting to 980 mm,yield didn′t increase but reduce.The effect order of interaction was nitrogen and water coupling>nitrogen and phosphorus coupling>potash and water coupling>phosphorus and water coupling>phosphorus and potash coupling>nitrogen and potash coupling.Interactions of nitrogen and water,nitrogen and phosphorus coupling were significant,the others were not significant.