| Effects of limited irrigation on water use of winter wheat |
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| DOI：10.7606/j.issn.1000-7601.2003.01.02 |
| Key Words: limited irrigation water consumption water use efficiency winter wheat |
| Author Name | Affiliation | | XU Zhen-zhu | Key Laboratory of Wheat Physiology and Genetic Improvement,Ministry of Agriculture, Shandong Agricultural University,Taian,Shandong,271018,China；Key Laboratory of Quantitative Vegetation Ecology,Institute of Botany,CAS,Beijing 100093,China | | YU Zhen-wen | Key Laboratory of Wheat Physiology and Genetic Improvement,Ministry of Agriculture, Shandong Agricultural University,Taian,Shandong,271018,China |
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| Abstract: |
| The studies were carried out in rainfall-proof trough during 19 992000 to investigate the dynamic changes of soil moisture and effects of soil moisture on water use of winter wheat. The results showed that the use cap acity of winter wheat was high for soil supplying water. Water consumption rate was the highest during jointing to flowering, around 5.71 mm/d; but it was the smallest during over-wintering to turning-green, about 0.25 mm/d. Water consu mption rate became higher when irrigated. Water consumption rate of treatment E(total irr igation norm was 420mm) was 4.65 times of that of treatment A, and consumption n orm in whole growth period was 1.92 times. Water use efficiency of winter wheat was influenced considerably by over-irrigation or severe deficit of soil moisture, and over-irrigation decreased obviously marginal profit of irrigatio n and resulted in the waste of water resource. |
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