在覆盖补水条件下，设置了不同覆盖方式、不同补水时期、不同追肥时期和不同施肥量等试验。结果表明，地膜穴播产量较高，较对照增产41.3％，比膜侧条播增产21.1％。在覆盖基础上，底墒较差时，越冬前补水较对照增产30.5％；底墒较好时，拔节期补水较对照增产15％以上。在覆盖补水前提下，将常规的一次性施肥分别改为拔节、越冬和孕穗3个时期追肥，拔节期追肥产量比对照增产14.3％；越冬追肥增产9.0％。不同化肥施用量，N300P300K240产量较CK增产20.0％；次为N150P300K120和N150P225K120，再次为N225P225 K180和N150P150K120。在不同施氮水平(纯N75 kg/hm2～300 kg/hm2)和不同施K2O水平(K2O 60 kg/hm2～240 kg/hm2)中，产量随着施磷量的增加(P2O5 75 kg/hm2～300 kg/hm2)而增加。%Experiments of different mulching models, subsurface irrigation times, fertilizer topdressing and application rate were made during 1997～2000. Results show that wheat yield of bunch planting on plastic film increase 41.3% over traditional planting, 21.1% over row planting beside plastic film. Under the mulching, wheat yield of subsurface irrigation before winter can increase 30.5% over traditional management when rainfall is small before planting wheat. Wheat yield of subsurface irrigation during elongation stage can increase 15% over traditional management when it is rainy before planting wheat. Combining base fertilizer with topdressing can increase wheat yield. Topdressing during elongation stage can increase wheat yield by 14.3% over single base fertilization. By the way, adding phosphate fertilizer is very useful to enhance wheat yield.
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