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采用根系研究装置研究了土壤深层供水对冬小麦干物质生产的影响 .结果表明 ,上层低湿度下层高湿度的处理在小麦灌浆期仍然保持了较高的土壤和叶片含水量 ,具有发达的根系 ,特别是 1m以下的根量在 4个处理中为最高 ,旗叶和穗的干重也最大 ,具有最大的产量潜力 .本研究表明 ,上层土壤较干下层土壤湿润有利于发挥小麦根信号的积极作用 ,平衡水分利用 ,同时通过对土壤水分的合理调节可以促进深层根的发育 ,有利于提高产量和水分利用效率 .
The effects of deep soil water supply on dry matter production of winter wheat were studied using a root research device.The results showed that high humidity in the upper low-humidity layer still maintained high soil and leaf water content at the grain filling stage and had developed roots, especially The root volume under 1m was the highest among the four treatments and the dry weight of the flag leaves and ears was also the largest with the maximum yield potential.The present study showed that wetting of the upper soil with the lower soil layer was beneficial to the positive effect of wheat root signal , Balanced water use, and through the proper regulation of soil moisture can promote the development of deep roots, is conducive to improving the yield and water use efficiency.