| PELIMINARY ANALYSES FOR CROP WATER CONSUMPTION BY USING LYSIMETER |
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| 作者姓名： | Chen Jianyao Wu Kai Institute of Geography CAS Beijing People's Republic of China |
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| 作者单位： | Chen Jianyao Wu Kai Institute of Geography，CAS，Beijing 10010 People's Republic of China |
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| 基金项目： | TheauthorisgratefulforfinancialsupportforthisstudyfromNationalNaturalScienceFoundationofChinaandfor
OpenFundfromYuchengAgricult |
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| 摘 要： | Ｉ.ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅＨｕａｎｇ-Ｈｕａｉ-ＨａｉＰｌａｉｎｉｎＮｏｒｔｈＣｈｉｎａｉｓａｃｒｕｃｉａｌａｒｅａｉｎｐｒｏｖｉｄｉｎｇａｂｏｕｔｏｎｅ-ｆｉｆｔｈｏｆｔｏｔａｌｓｔａｔｅｆｏｏｄ4],ａｎｄｉｔｉｓｆａｃｉｎｇａｓｅｒｉｏｕｓｗａｔｅｒｓｈｏｒｔａｇｅｉｎｒｅｃｅｎｔｙｅａｒｓｄｕｅｔｏｔｈｅｅｘｐａｎｓｉｏｎｏｆｉｎｄｕｓｔｒｙａｎｄａｃｏｎｔｉｎｕｏｕｓｄｅｃｒｅａｓｅｉｎｐｒｅｃｉｐｉｔａｔｉｏｎ.Ｔｈｅｓｔｕｄｙｉｎｓｏｉｌ-ｐｌａｎｔ-ａｔｍｏｓｐｈｅｒｅｃｏｎｔｉ…
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PELIMINARY ANALYSES FOR CROP WATER CONSUMPTION BY USING LYSIMETER |
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| Chen Jianyao Wu Kai Institute of Geography,CAS,Beijing People''s Republic of China.PELIMINARY ANALYSES FOR CROP WATER CONSUMPTION BY USING LYSIMETER[J].Journal of Geographical Sciences,1997(3). |
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| Authors: | Chen Jianyao Wu Kai Institute of Geography CAS Beijing People's Republic of China |
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| Abstract: | This paper deliberates on the issue of water consumption (evapotranspiration, ET) of three main crops in North China: wheat, corn and bean, which is mainly related to three factors as indicated by the definition of SPAC system. Water consumption was measured on daily and sometimes hourly basis by Lysimeter, which can be adjusted to have the same groundwater level as that in the field, thus the measurement could serve as representative of crop water consumption for adjacent area. The consumption period for three crops has been analyzed and cumulative deviation from the mean of daily evapotranspiration been used to divide the whole growing period into several parts, which are related to but different from the growing periods. The serial correlation coefficients for varied lag time have been calculated to verify that the process of daily ET is not random, and therefore the cumulative daily consumption has been simulated by polynomial method, which gives relative good results. Finally, the effort has been made to investigate the relation of crop yield and water consumption and water use efficiency based on a time series of seven years. |
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| Keywords: | water consumption crop yield use efficiency Huang-Huai-Hai Plain lysimeter |
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