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本文通过讨论不同土壤水分条件下,无机营养对春小麦净光合率、叶片导度、干物质生产、水分消耗等的影响,表明施肥使营养缺乏的春小麦的光合物质生产,水分消耗及水分利用效率(WUE)都明显增大,无机营养对春小麦物质同化和生长的促进要远大于其因增加水分散失而带来的不利影响;在土壤干旱时,施肥春小麦的光合物质生产、水分消耗下降幅度都大于不施肥春小麦,干旱削弱了无机营养在提高春小麦光合物质生产和产量方面的作用。据此,对旱地的合理施肥技术提出了建议。
In this paper, the effects of inorganic nutrition on the net photosynthetic rate, leaf conductance, dry matter production and water consumption of spring wheat under different soil moisture conditions were discussed in this paper. The results showed that photosynthetic production, water consumption and water use efficiency WUE) were significantly increased, inorganic nutrients on spring wheat assimilation and growth promotion is far greater than its due to increased water loss caused by the adverse effects; soil drought, the fertilization of spring wheat photosynthetic material production, water consumption decreased by more than Not fertilizing spring wheat, drought weakened the role of inorganic nutrition in improving spring wheat photosynthate production and yield. Accordingly, the reasonable fertilization technology of dry land is proposed.