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采用 3 12 D最优饱和设计和二次通用旋转组合设计 ,通过 8年连续试验 ,对辽西半干旱区影响农业生产的水、肥因素的耦合作用进行了田间试验 .讨论分析了N、P、水及其耦合作用对作物产量的影响 .施N、施P、灌水和覆盖秸秆的合理匹配能够明显提高作物产量 ,否则 ,不仅增加成本 ,而且由于加重作物的水分或养分胁迫 ,造成减产 .根据试验结果进行了生产要素的产量效益分析 ,提出了该地区小麦、玉米生产的水肥最佳经济配比 :小麦为生育期供水 12 0 .2mm ,N 5 8.5kg·hm-2 ,P2 O512 3 .0kg·hm-2 ;玉米为生育期灌水 173 .3mm ,N 2 5 6.5kg·hm-2 ,P2 O585 .5kg·hm-2 ,覆秸秆 85 0 9.5kg·hm-2 .
In this paper, a 3 12 D optimal saturation design and quadratic universal rotary combination design were adopted to conduct a field experiment on the coupling effects of water and fertilizer factors affecting agricultural production in semi-arid western Liaoning through eight years of continuous experiments. The effects of N, P, Water and their coupling effect on crop yield.The reasonable matching of applying N, P, irrigation and covering straw can obviously increase crop yield, otherwise not only increase the cost, but also decrease the yield due to aggravating the water or nutrient stress of the crop.According to The results of the experiment carried out the yield and benefit analysis of the factors of production and put forward the optimal economic ratio of water and fertilizer for the wheat and corn production in the region. The wheat supply water for the growth period was 120.2mm, N5 8.5kg · hm-2 and P2 O5123. 0kg · hm-2. Corn was 173.3mm, N 2 5 6.5kg · hm -2, P 2 O 585. 5kg · hm -2 and 85 0 9.5kg · hm -2 for the growth period.