| 土壤深层供水对冬小麦干物质生产的影响 |
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| 引用本文： | 李凤民,郭安红.土壤深层供水对冬小麦干物质生产的影响[J].应用生态学报,1997,8(6):575-579. |
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| 作者姓名： | 李凤民 郭安红 |
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| 作者单位： | 兰州大学干旱农业生态国家重点实验室!兰州730000 |
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| 基金项目： | 国家自然科学基金!( 3 94 0 0 0 1 9)，黄土高原土壤侵蚀与旱地农业国家重点实验室开放基金 |
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| 摘 要： | 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 .
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| 关 键 词： | 冬小麦 根系 水分利用 产量 干物质分配 |
Effect of water supply from deep soil on dry matter production of winter wheat. |
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| Li Fengmin,Guo Anhong,Luo Mei and Zhao Songling.Effect of water supply from deep soil on dry matter production of winter wheat.[J].Chinese Journal of Applied Ecology,1997,8(6):575-579. |
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| Authors: | Li Fengmin Guo Anhong Luo Mei and Zhao Songling |
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| Abstract: | A root growth device was used to study the effect of water supply from deep soil on dry matter production of winter wheat. The results show that soil with high moisture in deeper layer and low moisture in upper layer (treatment LH) still maintains a higher water content both in soil and in plant leaf during the milking stage of wheat growth. This treatment gives the highest dry weight of roots, flag leaves and spikes, and hence, a maximum yield potential. It seems that such a soil moisture status is beneficial to promoting root development in deeper soil, balancing water utilization, and improving crop yield. |
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| Keywords: | Winter wheat Root system Water utilization Yield Matter allocation |
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