| 灌溉量对紫花苜蓿水分利用效率和耗水系数的影响 |
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| 引用本文： | 孙洪仁,马令法,何淑玲,李品红,刘爱红.灌溉量对紫花苜蓿水分利用效率和耗水系数的影响[J].草地学报,2008,16(6):636. |
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| 作者姓名： | 孙洪仁 马令法 何淑玲 李品红 刘爱红 |
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| 作者单位： | 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 |
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| 基金项目： | 农业部948国际先进农业科技引进重大专项，科技部科技支撑项目，农业部公益性行业科研专项 |
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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)。
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| 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 |
| 收稿时间： | 2008-02-15 |
Effect of Irrigation Amount on Water Use Efficiency and Water Consumption Coefficient of Alfalfa |
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| SUN Hong-ren,MA Ling-fa,HE Shu-ling,LI Pin-hong,LIU Ai-hong.Effect of Irrigation Amount on Water Use Efficiency and Water Consumption Coefficient of Alfalfa[J].Acta Agrestia Sinica,2008,16(6):636. |
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| Authors: | SUN Hong-ren MA Ling-fa HE Shu-ling LI Pin-hong LIU Ai-hong |
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| Institution: | 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 |
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| 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). |
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| Keywords: | Alfalfa Water use efficiency Water consumption coefficient Irrigation amount Water consumption Bashang area |
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