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试验采用两因素正交设计 ,研究氮磷肥对旱地春小麦产量的影响 ,结果表明 :氮肥是制约旱地春小麦产量提高的主要限制因子 ,其次是磷肥。进行二次回归分析 ,可计算出肥料的效应函数 ,其函数为 : Y =96 1.76 +9.4 5 80X1+6 .5 4 31X2 - 0 .0 16 1X12 - 0 .0 174X2 2 - 0 .0 0 92X1X2
The orthogonal experimental design was adopted to study the effect of N and P fertilizers on the yield of spring wheat in dry land. The results showed that N fertilizer was the main limiting factor to increase the yield of spring wheat in dry land, followed by P fertilizer. For the second regression analysis, the effect of fertilizer can be calculated, the function is: Y = 96 1.76 +9.4 5 80X1 +6 .5 4 31X2 - 0 .0 16 1X12 - 0 .0 174X2 2 - 0 .0 92X1X2