棉花优化施肥模型及氮磷最佳配方的研究

Study on Fertilizing Model of N& P Ferfilizer and Simulation for Spring Cotton

通过最优回归设计田间试验测得的数据 ,建立以皮棉产量为目标函数的氮磷效应模型 ,Y=86.0 4 +5.2 3X1+4.2 6X2 - 5.88X21- 3.62 X22 - 2 .64X1X2 根据模型计算得出最大施肥量为纯 N13.4 6、P2 O511.77kg/ mu,最佳施肥量为 N13.31kg、P2 O511.60 kg/ mu。由最佳氮磷养分合成模型 Y=- 2 .8591Z2 +4.715Z+86.0 4 ,模拟得出不同目标产量的经济最佳纯养分组合及 N、P2 O5最佳施用量 。

According to the data obtained from experiments designed by optimized regression de- sign.established Iint yield regression eguation for N &P as Y=86 .0 4+ 5 .2 3X1 + 4.2 6 X2 - 5 .88x21 - 3.6 2 X22 - 2 .46 X1 X2 ,Maximum N &P application rates calculated from the equation are N1 3.46 kg/mu,P2 O5 1 1 .77kg/mu,and optimal N &P application rates are N1 3.2 9kg/ mu,P2 O5 1 1 .6 0 kg/mu,By application for N &P ration,the above equation is simplified to a factor equation as Y=- 2 .82 0 4Z2 + 4.6 397Z+ 86 .0 .The optimal N &P ration and applica- tion rates calculated by the equation can help fertilizing.