草地学报

›› 2008, Vol. 16 ›› Issue (6): 636-639,645.DOI: 10.11733/j.issn.1007-0435.2008.06.018

• 研究论文 • 上一篇    下一篇

灌溉量对紫花苜蓿水分利用效率和耗水系数的影响

孙洪仁1, 马令法2, 何淑玲3, 李品红1, 刘爱红1   

  1. 1. 中国农业大学草地研究所, 北京, 100193;
    2. 甘肃农业大学草业学院, 兰州, 730070;
    3. 甘肃农业大学农学院, 兰州, 730070
  • 收稿日期:2008-02-15 修回日期:2008-07-15 出版日期:2008-12-15 发布日期:2008-12-15
  • 作者简介:孙洪仁(1965- ),男,吉林怀德人,副教授,主要从事人工草地栽培管理及宏观草业研究,E-mail:sunhongren@cau.edu.cn
  • 基金资助:
    农业部“948”国际先进农业科技引进重大专项(2006-G38);科技部“十一五”科技支撑项目(2006BAD16B03);农业部公益性行业科研专项(nyhyzx07-022)

Effect of Irrigation Amount on Water Use Efficiency and Water Consumption Coefficient of Alfalfa

SUN Hong-ren1, MA Ling-fa2, HE Shu-ling3, LI Pin-hong1, LIU Ai-hong1   

  1. 1. Institute of Grassland Science, China Agricultural University, Beijing 100193, China;
    2. Prataculture College, Gansu Agricultural University, Lanzhou, Gansu Province 730070, China;
    3. College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu Province 730070, China
  • Received:2008-02-15 Revised:2008-07-15 Online:2008-12-15 Published:2008-12-15

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摘要： 采用大型非称重式蒸渗仪法,在河北省坝上地区研究灌溉量对紫花苜蓿(Medicago sativa L.)水分利用效率和耗水系数的影响。结果表明:随着灌溉量由0增至400 mm,紫花苜蓿耗水量由335.5增至712.8 mm,干物质产量由3304.7增至7423.3 kg/hm2,二者差异显著(P<0.05);第1茬生物产量和经济产量水分利用效率分别由10.5和12.2降至6.8和7.9 kg/(mm·hm2),第2茬则相反,分别由9.5和11.1增至19.0和22.1 kg/(mm·hm2),但第1~2茬差异不显著;第1茬耗水系数分别由956和822升至1480和1273,第2茬则相反,分别由1053和906降至527和453,但1~2茬差异不显著;不同茬次间水分利用效率及耗水系数差异显著(P<0.05)。

关键词: 紫花苜蓿, 水分利用效率, 耗水系数, 灌溉量, 耗水量, 坝上地区

Abstract: Effect of irrigation amount on water use efficiency(WUE) and water consumption coefficient(WCC) of alfalfa(Medicago sativa L) was studied in Bashang area,Hebei Province,using large scale no-weighting-lysimeter.The results show that the water consumption of alfalfa in Bashang area inceased from 335.5 to 712.8 mm,the forage yield multiplied from 3304.7 to 7423.3 kg/hm2(P<0.05) when the irrigation amount changed from 0 to 400 mm.WUE based on biological and economic yield of first harvest declined from 10.5 and 12.2 to 6.8 and 7.9 kg·mm.hm-2,respectively.On the contrast,those of the second harvest boosted from 9.5 and 11.1 to 19.0 and 22.1 kg·mm·hm-2,respectively.But the differences of those in the whole growing season were not significant.WCC based on biological and economic yield of first harvest boosted from 956 and 822 kg·mm·hm-2 to 1480 and 1273 kg·mm.hm-2,respectively.On the contrast,those of the second harvest declined from 1053 and 906 to 527 and 453 kg·mm.hm-2,respectively.But the differences of those in the whole growing season were not significant.The differences of WUE and WCC between different harvest times were significant(P<0.05).

Key words: Alfalfa, Water use efficiency, Water consumption coefficient, Irrigation amount, Water consumption, Bashang area

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