| 北京平原区紫花苜蓿建植当年的需水规律 |
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| 引用本文： | 孙洪仁,张英俊,韩建国,逯涛林,高飞.北京平原区紫花苜蓿建植当年的需水规律[J].中国草地学报,2006,28(4):35-38. |
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| 作者姓名： | 孙洪仁 张英俊 韩建国 逯涛林 高飞 |
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| 作者单位： | 中国农业大学草地研究所 北京100094 |
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| 基金项目： | 农业部农业结构调整技术研究专项基金 |
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| 摘 要： | 采用小型蒸渗仪法研究了北京平原区中苜1号和WL323紫花苜蓿建植当年的需水量、需水强度及行间蒸发占蒸散量的比例。结果表明:中苜1号和WL323全生长季的需水量分别为909.2mm和928.0mm,两个品种之间差异不显著;不同茬次之间差异显著(P<0.05),第2茬最低,第3茬最高。中苜1号和WL323全生长季的需水强度分别为4.4mm/d和4.5 mm/d,两个品种之间差异不显著;不同茬次之间差异显著(P<0.05),第2茬最高,第1茬最低。中苜1号和WL323全生长季行间蒸发占蒸散量的比例分别为26.0%和25.5%,两个品种之间差异不显著;不同茬次之间差异显著(P<0.05),第2茬最高。
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| 关 键 词： | 北京平原区 紫花苜蓿 需水规律 需水量 需水强度 行间蒸发 蒸散量 |
| 文章编号： | 1673-5021(2006)04-0035-04 |
| 修稿时间： | 2005年12月20 |
The Water Requirement Regularity of Alfalfa in the Establishment Year in Beijing Plain |
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| SUN Hong-ren,ZHANG Ying-jun,HAN Jian-guo,LU Tao-lin,GAO Fei.The Water Requirement Regularity of Alfalfa in the Establishment Year in Beijing Plain[J].Chinese Journal of Grassland,2006,28(4):35-38. |
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| Authors: | SUN Hong-ren ZHANG Ying-jun HAN Jian-guo LU Tao-lin GAO Fei |
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| Abstract: | The water requirement(WR),water requirement rate(WRR) and the ratio of soil evaporation to evapotranspiration(R_(E/ET)) of Zhongmu No 1 and WL323 alfalfa(Medicago sativa L.) in the establishment year in Beijing plain were studied with micro-lysimeter.The results showed that the WRs of Zhongmu No 1 and WL323 were 909.2 and 928.0 mm,respectively,in the whole growth season and there were no differences between varieties.The WRs in different harvests were evidently different(P<0.05),and the 2nd harvest was lowest but the 3rd harvest was highest.The WRRs in the whole growth season of Zhongmu No 1 and WL323 were 4.4 and 4.5 mm/d,respectively,and there were no differences between varieties.The WRRs of different harvests were evidently different(P<0.05),and the 2nd harvest was lowest but the 1st harvest was highest.The R_(E/ET) in the whole growth season of Zhongmu No 1 and WL323 were 26.0% and 25.5%,respectively,and there were no differences between varieties. The WRRs of different harvests were evidently different(P<0.05),and the 2nd harvest was highest. |
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| Keywords: | Beijing plain Alfalfa Water requirement regularity Water requirement Water requirement rate Soil evaporation Evapotranspiration |
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