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中文摘要：
良好的出苗情况是玉米高产稳产的前提。辽西半干旱地区春季旱情严重，如何保证玉米出苗，实现苗齐、苗匀、苗壮，是农业生产中急需解决的难题。在坐水播种条件下，通过“311-B”D饱和最优设计，研究玉米苗期坐水量与施肥量的耦合效应，对玉米苗地上部干质量进行二次回归拟合，建立了各因素的回归数学模型。试验结果表明：坐水量是影响玉米苗地上部分干质量的主要因素，其次为磷肥，再次为氮肥；各因素交互作用顺序为：NP〉水N〉水P；从各因素交互作用角度来看，以略高的坐水量（49．356t／hm^2）、中等的氮肥（63．923kg／hm^2）和中等的磷肥（128．25kg/hm^2）为水肥耦合的最佳组合。
英文摘要：
How to achieve that the seeding of in order, well-proportioned and haleness is an instant need in agricultural production in semi-drought area of western Liaoning province, because spring drought is very serious. While the good states of seedling emergence is a necessary precondition for the high yield and dependable crop. The coupling effect of bed-irrigating sowing and fertilizer at corn seedling stage were investigated by ＂311-B＂ D-saturation optimum design. The regressive math model was set up based on the dry weight of corn seedling above ground by quadratic regression analysis. Analysis showed that the water amount in corn bed-irrigating sowing was the major factor influencing the dry weight of corn seedling above ground. The following were dosage of N fertilizer and the rate of P fertiliz- er. The interaction effects among these factors with the influenced order was N and P〉water amount and N〉water amount and P. From the dry weight of corn seedling above ground aspect, the optimum combination of water amount in corn bed-irrigating sowing was 49.356 t/hm^2 somewhat above the middling level under the conditions of this experiment; with N and P were 63.923 kg/hm^2 and 128.25 kg/hm^2 respectively, somewhat under the middling level of N and around middling level of P.
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