论文部分内容阅读
[目的]为了研究NPK不同配比对广西赤红壤区甘蔗间套种马铃薯产量的效应,寻求适合甘蔗间套种马铃薯营养模式的最佳NPK配比。[方法]采取最优混合设计311-A于2011和2012年在广西隆安蔗地进行甘蔗间套种马铃薯田间试验,运用SAS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,并通过计算机程序对模型进行仿真寻优。[结果]在试验条件下,低氮与中高磷钾配施可获得较高的马铃薯产量。用SAS统计分析软件进行分析,可分别建立2011和2012年马铃薯产量(Y11和Y12)与氮(X1)、磷(X2)、钾(X3)用量的回归模型:Y11=14725.28-415.39X1+741.99X2+607.83X3-447.92X1X2-144.09X1X3-405.83X2X3-267.82X12-795.67X22-642.10X32,R=0.9272;Y12=14342.60-896.25X1+548.62X2+925.51X3+67.81X1X2+531.60X1X3-99.00X2X3-904.00X12-1121.36X22-596.64X32,R=0.9266。所建立的马铃薯产量回归数学模型与实际情况拟合得较好,具有较强的实用性,可用作当地甘蔗间套种的马铃薯施肥决策和预报。采用计算机进行寻优,得到甘蔗间套种马铃薯产量最佳的NPK用量,N、P2O5、K2O用量分别为108.8～140.6、172.5～204.4和285.9kg/hm2。[结论]甘蔗间套种马铃薯产量最佳的NPK配比为1(:1.23～1.88):(2.03～2.63)。
[Objective] The research aimed to study the effect of different NPK ratio on the yield of sugar cane intercropping potato in Guangxi hilly region and find the optimum ratio of NPK suitable for intercropping potato cane. [Method] Taking the optimal mixture design 311-A in the sugarcane field of Guangxi Longan in 2011 and 2012 to test the intercropping of sugarcane and potato. The regression analysis of the test results was carried out by using the SAS statistical analysis software. The polynomial regression model was established and the computer program Simulation of the model is optimized. [Result] Under the experimental conditions, high nitrogen and medium phosphorus and potassium fertilizers could achieve higher yield of potato. The statistical analysis software SAS can establish the regression model of potato yield (Y11 and Y12) and nitrogen (X1), phosphorus (X2) and potassium (X3) consumption in 2011 and 2012 respectively: Y11 = 14725.28-415.39X1 + 741.99 X2 + 607.83X3-447.92X1X2-144.09X1X3-405.83X2X3-267.82X12-795.67X22-642.10X32, R = 0.9272; Y12 = 14342.60-896.25X1 + 548.62X2 + 925.51X3 + 67.81X1X2 + 531.60X1X3-99.00X2X3-904.00 X12-1121.36X22-596.64X32, R = 0.9266. The established mathematic model of potato yield regression fit well with the actual situation and has strong practicability, which can be used as a decision-making and prediction of potato fertilization in the intercropping of sugar cane in the area. Optimized by computer, the optimal amount of NPK for the intercropping of sugarcane was obtained. The dosage of N, P2O5 and K2O were 108.8-140.6, 172.5- 204.4 and 285.9kg / hm2, respectively. [Conclusion] The optimal ratio of NPK to intercropping sugar cane was 1 (1.23 ~ 1.88) :( 2.03 ~ 2.63).