应用最优混合设计研究氮磷钾不同配比对甘蔗产量和产糖量的效应

应用“311—A”最优混合设计进行田间试验,研究氮肥、磷肥、钾肥用量不同配比对甘蔗产量和产糖量的效应,通过运用统计分析软件对试验结果进行回归分析,建立多项式回归模型,寻求出甘蔗蔗茎产量及其产糖量的氮肥、磷肥、钾肥最佳组合范围及其最佳配比用量方案。在供试条件下,对于甘蔗产量的氮、磷、钾肥料用量最佳组合范围方案为:N=268.6~312.2kg/hm2,P2O5=130.7~141.3kg/hm2,K2O=322.4~344.8kg/hm2,N∶P2O5∶K2O=1∶0.45~0.49∶1.10~1.20,最高产量预测值为112.7t/hm2;对于产糖量的最佳组合范围方案为:N=257.9~290.8kg/hm2,P2O5=139.0~158.0kg/hm2,K2O=325.3~350.6kg/hm2,N∶P2O5∶K2O=1∶0.54∶1.20~1.26,最高产糖量预测值为16.3t/hm2。对于产量的经济最佳施肥量方案为:N=311.7kg/hm2,P2O5=140.8kg/hm2,K2O=344.4kg/hm2,N∶P2O5∶K2O=1∶0.45∶1.10;对于产糖量的经济最佳施肥量方案为:N=290.6kg/hm2,P2O5=157.8kg/hm2,K2O=350.4kg/hm2,N∶P2O5∶K2O=1∶0.54∶1.21。

Study on the effect of the different ration of nitrogen, phosphorus and potassium on yields of sugarcane by the optimization compound design

The optimization compound design (311-A) was used to conduct field experiment to study the effects of the different ration of nitrogen,phosphorus and potassium on yields of sugarcane.By using SAS system software analysis,the regression models of fertilizers application and quadratic of three factors were established,and the optimum allocation and range of N,P_2O_5,K_2O on yield and sugar yield of sugarcane were obtained.For the optimum range of N,P_2O_5,K_2O of yield scheme:N=268.61312.23 kg/hm~2,P_2O_5=130.66141.31 kg/hm~2,K_2O=322.41344.82 kg/hm~2,NP_2O_5K_2O=10.450.491.101.20,predicted value at the maximum yield is 112.672 kg/hm~2;For the optimum range of N,P_2O_5,K_2O of sugar yield scheme:N=257.91290.83 kg/hm~2,P_2O_5= 139.03158.05 kg/hm~2,K_2O=325.28350.57 kg/hm~2,NP_2O_5K_2O=10.541.201.26,predicted value at the maximum sugar yield is 16.311 kg/hm~2.For the optimum allocation of N,P_2O_5,K_2O of yield scheme:N=311.72 kg/hm~2,P_2O_5=140.80 kg/hm~2,K_2O=344.41 kg/hm~2,NP_2O_5K_2O=10.451.10;For the optimum allocation of N,P_2O_5,K_2O of sugar yield scheme:N=290.60 kg/hm~2,P_2O_5=157.80 kg/hm~2,K_2O=350.38 kg/hm~2,NP_2O_5K_2O=10.541.21.