| 不同时期水分亏缺对冬小麦根系效率及后期抗旱性的影响 |
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| 引用本文： | 马守臣,孙景生,杨慎骄,王和洲,段爱旺.不同时期水分亏缺对冬小麦根系效率及后期抗旱性的影响[J].灌溉排水学报,2011,30(5):67-70. |
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| 作者姓名： | 马守臣 孙景生 杨慎骄 王和洲 段爱旺 |
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| 作者单位： | 1. 河南理工大学测绘与国土信息工程学院,河南焦作454000／中国农业科学院农田灌溉研究所农业部作物需水与调控重点实验室,河南新乡453003／中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西杨凌712100
2. 中国农业科学院农田灌溉研究所农业部作物需水与调控重点实验室,河南新乡,453003 |
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| 基金项目： | 农业部作物需水与调控重点实验室开放基金，中国博士后科学基金，黄土高原土壤侵蚀与旱地农业国家重点实验室基金 |
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| 摘 要： | 采用盆栽试验方法研究了不同生育期水分亏缺对冬小麦根系效率、后期抗旱性和水分利用效率的影响。试验设3个水分亏缺处理时期：越冬—拔节期、返青—拔节期、拔节—抽穗期;每个时期水分亏缺程度均为田间持水率的45%～50%。设置对照（CK）土壤含水率为田间持水率的70%～75%。结果表明,返青—拔节期水分亏缺提高了小麦的根系效率和...
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| 关 键 词： | 冬小麦 水分亏缺 根系效率 抗旱能力 水分利用效率 |
Effect of Water Deficit at Different Growth Stages on Root Efficiency and Drought Tolerance in Late Growing Stage of Winter Wheat |
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| Abstract: | A pot experiment was conducted to clarify the effect of water deficit at different growth stages on root efficiency and water use efficiency of winter wheat.Plants were subjected to three water deficit stages: over-wintering-jointing stage,returning green-jointing stage,jointing-heading stage,plants were maintained at 45%~50% FWC(field water capacity) at every stage.After water deficit treatment terminated,plants were maintained at 70% FWC.The control plants(CK) were maintained at 70% FWC in the experimental period.The results showed that water deficit treatments of returning green-jointing stage improved significantly root efficiency and water use efficiency of winter wheat.Water deficit treatments of over-wintering-jointing stage and jointing-heading stage improved significantly root efficiency of winter wheat and reduced significantly water consumption,but water use efficiency was unaffected due to reducing grain yield.The values of chlorophyll fluorescence parameters,i.e.,effective PSⅡ quantum yield,apparent rate of photosynthetic electron transport,coefficient of photochemical quenching and coefficient of non-photochemical quenching,were significantly higher in three water deficit treatments than the control 5 days after withholding water at anthesis.This means that water deficit treatments improved drought tolerance ability of wheat,resulting in improved photosynthetic capability. |
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| Keywords: | winter wheat water deficit root efficiency drought tolerance ability water use efficiency |
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