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从水肥耦合的角度 ,研究了高寒半干旱区旱滩地莜麦的水肥产量效应。结果表明 :不同供水条件下 ,施肥量的增加 ,使莜麦株高增大 ,穗部性状改善。从不同水肥处理的产量反应看 ,平水高肥处理 (N12 0 P90 W350 )增产效果最大 ,较干旱年N0 P0 增产 5 81 7% ,且其水分利用效率也达最高 ,为 3 44kg·mm-1·hm-2 。在相同施肥水平下 ,与干旱年型相比 ,其它年型水分增产达 14 5 %～ 32 2 6 % ;而同一降水年型下 ,不同施肥处理比N0 P0 增产仅 2 17%～149 94%。水分增产效果大于施肥效果。水是旱滩地上莜麦产量提高的主要限制因子 ,地力次之
From the perspective of water and fertilizer coupling, the effects of water and fertilizer yield on S. Mongolica on dry land in the alpine semiarid area were studied. The results showed that under different water supply conditions, the increase of fertilizers increased the plant height and the ear traits. From the yield response of different water and fertilizer treatments, the yield increase effect of high water and fertilizer treatment (N12 0 P90 W350) was the largest, which increased by 5 81 7% and the highest water use efficiency was 34 44 kg · mm -1 · Hm-2. Under the same fertilization level, the yield of other annuals increased by 14.5% ~ 32.26% compared with that of the drought years. However, under the same rainfall type, the yield of different fertilization treatments was only 2 17% ~ 149 94% . Water yield greater than the effect of fertilization. Water is the main limiting factor for the increase of oat production on the dry land, followed by the second