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刘恩民, 张代桥, 刘万章, 刘玉洁. 鲁西北平原农田耗水规律与测定方法比较[J]. 水科学进展, 2009, 20(2): 190-196.
引用本文: 刘恩民, 张代桥, 刘万章, 刘玉洁. 鲁西北平原农田耗水规律与测定方法比较[J]. 水科学进展, 2009, 20(2): 190-196.
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LIU En-min, ZHANG Dai-qiao, LIU Wan-zhang, LIU Yu-jie. Water consumption of the crops in the northwestern Shandong plain and comparisons of lysimeter and eddy covariance technique[J]. Advances in Water Science, 2009, 20(2): 190-196.
Citation: LIU En-min, ZHANG Dai-qiao, LIU Wan-zhang, LIU Yu-jie. Water consumption of the crops in the northwestern Shandong plain and comparisons of lysimeter and eddy covariance technique[J]. Advances in Water Science, 2009, 20(2): 190-196.
shu

鲁西北平原农田耗水规律与测定方法比较

Water consumption of the crops in the northwestern Shandong plain and comparisons of lysimeter and eddy covariance technique

    摘要
  • 摘要: 利用中国科学院禹城综合试验站的大型蒸渗仪观测数据,分析了近20年来鲁西北平原典型农作物(冬小麦和夏玉米)的耗水规律。20年数据平均结果,冬小麦、夏玉米耗水量分别为457.6mm和411.7m,冬小麦平均日耗水量1.97mm,耗水量最大值6mm,夏玉米平均日耗水量3.18mm,最大耗水量4.8~6.0mm。夏玉米的耗水量有下降的趋势,可能为气候变化所致。同时,利用2年的同步观测数据对比了大型蒸渗仪与涡度相关法的测定结果,涡度相关法的优点是能较好地反映耗水量变化规律、数据的随机离散程度小、时间分辨率高,但其测定结果偏低,观测方法或异常数据的处理方法有待改进,订正后有望获得较好的结果。

     

    Abstract: Water consumption (WC) law of winter wheat and summer maize rotation system in the Northwestern Shandong plain is investigated on the base of 20 years' data from the weighing lysimeter in Yucheng comprehensive experimental station of the Chinese Academy of Sciences.The results indicate that the average WC of them are 457.6 and 411.7mm,respectively.For the winter wheat,the average daily WC and the maximum are 1.97 and 6mm/d,respectively.For the summer maize,the values are 3.18 and 4.8~6.0mm,respectively.The climate changes might contribute to the reduction of the WC by summer maize.Compared to the 2 years' synchronization data,the results determined by the ed by covariance(EC) technique can commendably reveal the WC law.However,the EC technique can bring about 20% decrease systemally,and the observation technique and unusual data processing methods are expected to produce preferable results after a further improvement.

     

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