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中文摘要：
通过大田试验,以灌溉定额X1、氮肥量X2、磷肥量X3、钾肥量X4为试验因素,选用4因素10水平的均匀设计,研究水肥耦合对马铃薯干物质生产量的影响。通过逐步回归建立干物质生产量与试验因素的回归模型,结果表明：各因素对马铃薯干物质生产量的影响顺序为：X3〉X1〉X2〉X4;两因素交互作用对马铃薯干物质生产量影响顺序为：X31X2〉X1X4〉X3X4〉X2X3〉X1X3;当X1为1 036.27 m/hm2,X2为241.05kg/hm2,X3为166.18kg/hm2,X4为77.60kg/hm2时马铃薯干物质最优生产量为1.975 488万kg/hm2。
英文摘要：
Through field experiment, selecting four experimental factors, including irrigation norm（X1 ）, nitrogenous fertilizer （X2）, phosphate fertilizer （X3）, and potash fertilizer （X4）, adopting the uniform design of factors with ten levels for each factor, the effect of water and fertilize coupling on dry-matter production of potato is studied. The regression models between dry-matter pro- duction and experimental factors are established through stepwise regression. The results show that the order of the effect of each factor on dry-matter production from big to small is X3, X1, X2, X4 ; the order of the interaction effect of two factors on dry-matter production from big to small is X1X2, X1X4, X3X4, X2X3, X1X3 ; the optimal dry-matter production, 19 754. 88 kg/hm2, can be achieved when the X1, X2, X3 and X4 are 1 036.27, 241.05, 166.18 and 77.60 kg/hm2 , respectively.
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