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对1990～1994年三个不同降水年型旱地施肥效应的研究结果表明,在地力瘠薄条件下,单独施用化肥,增产幅度为0.7％～29.9％;有机肥与化肥配合施用,增产幅度为82.0％～158.7％。原因主要是有机肥与化肥配施,能增加小麦的叶面积,延缓叶片衰老,增大了蒸腾量和光合势。同时减少了地面蒸发失水,从而提高了水分利用率,使部分原来对小麦生长的“无效”水变为“有效”水。
The results of fertilizer application on dry land in three years of different precipitation years from 1990 to 1994 showed that under the barren soil fertility conditions, the yield of single fertilizer was 0.7% -29.9%, and that of organic fertilizer and chemical fertilizer was 82.0% ~ 158.7%. The main reason is the combination of organic fertilizer and chemical fertilizer can increase the leaf area of wheat, delay leaf senescence, increase the transpiration and photosynthetic potential. While reducing evaporative water loss on the ground, increasing water use efficiency and making some of the “ineffective” water that was originally used to grow wheat into “effective” water.