| 旱地垄沟集雨种植紫花苜蓿最佳沟垄宽比的确定 |
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| 引用本文： | 寇江涛,师尚礼.旱地垄沟集雨种植紫花苜蓿最佳沟垄宽比的确定[J].草地学报,2011,19(2):247-252. |
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| 作者姓名： | 寇江涛 师尚礼 |
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| 作者单位： | 1. 甘肃农业大学草业学院, 兰州, 730070;2. 草业生态系统教育部重点实验室, 中-美草地畜牧业可持续研究中心, 兰州, 730070 |
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| 基金项目： | 农业部行业专项-人工草地优质牧草生产技术研究与示范，农业部牧草种质资源收集保护项目，国家现代牧草产业技术体系建设专项资金资助 |
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| 摘 要： | 采用旱地垄沟集雨种植紫花苜蓿(Medicago sativa L.),研究不同沟垄宽比和覆盖方式对苜蓿干草产量、水分利用效率的影响,并通过回归方程确定适宜我国干旱半干旱区种植紫花苜蓿的最佳沟垄比。结果表明:膜垄、土垄处理平均年干草产量分别为5604.87和4844.81 kg·hm-2,分别较CK提高204.98%和163.63%;膜垄、土垄处理平均水分利用效率分别为34.91和28.47 kg·mm-1·hm-2,分别为CK的2.25倍、1.83倍;膜垄的平均年干草产量、平均水分利用效率分别较土垄提高15.69%和22.62%;回归分析表明:当膜垄的最佳沟垄宽比为60 cm:60 cm、土垄的最佳沟垄宽比为60 cm:70 cm时,苜蓿的经济产量可以达到最大,分别为6009.3 kg·hm-2和5271.5 kg·hm-2,分别较CK提高226.99%和186.84%,膜垄处理的最大经济产量较土垄处理提高14.00%。因此,在试验地区及其相似地区采用膜垄集雨种植能显著提高苜蓿干草产量及水分利用效率,建议采用垄覆膜集雨种植紫花苜蓿,沟垄宽比为60 cm:60 cm。
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| 关 键 词： | 紫花苜蓿 垄沟集雨 水分利用效率 草产量 最佳沟垄比 |
| 收稿时间： | 2010-11-16 |
Optimum Ridge-Furrow Ratio in Dry-land Medicago sativa Cultivation |
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| KOU Jiang-tao,SHI Shang-li.Optimum Ridge-Furrow Ratio in Dry-land Medicago sativa Cultivation[J].Acta Agrestia Sinica,2011,19(2):247-252. |
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| Authors: | KOU Jiang-tao SHI Shang-li |
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| Institution: | 1. Collegeof Grassland Science, Gansu Agricultral Univercity, Lanzhou, Gansu Province 730070, China;2. Key Laboratory of Ecosystem Ministry of Education, Sino-Us Center for Grazingland Ecosystem Sustainability, Lanzhou, Gansu Province 730070, China |
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| Abstract: | Effects of ridge-furrow ratios and mulching methods on hay yield and water use efficiency of alfalfa are studied in dry-land alfalfa cultivation.Optimum ridge-furrow ratio in arid and semi-arid areas of China is determined according to regression equations.Results indicate that the average annual hey yield is 5604.87 kg·hm-2 for ridges covered by plastic film,and is 4844.81 kg·hm-2 for ridges compacted by soil,both are 204.98% and 163.63% times higher than the control,respectively.The average water use efficiency is 34.91 kg·mm-1·hm-2 for ridges covered by plastic film,and is 28.47 kg·mm-1·hm-2 for ridges covered by soil,both are 2.25 and 1.83 times more than the control.The average annual hey yield and water use efficiency of ridges covered by plastic film are increased by 15.69% and 22.62% compared with ridges compacted by soil.The maximum economic yield could be realized when the ridge-furrow ratio is 60cm to 60cm for ridges covered by plastic film at 6009.3 kg·hm-2 and 60cm to 70cm for ridges compacted by soil at 5271.5 kg·hm-2,both are 226.99% and 186.84% times higher than the control according to regression analysis.The maximum economic yield for plastic film treatments is 14.00% times higher than soil treatments,indicating that ridge-furrow rainfall harvesting cultivation in experimental and similar areas could significantly increase hey yield and water use efficiency in alfalfa cultivation.Results suggest that ridge-furrow rainfall harvesting cultivation method is used in alfalfa cultivation at 60cm to 60cm ridge-furrow ratio. |
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| Keywords: | Medicago sativa Ridge-furrow rainfall harvesting Water use efficiency Hey yield Optimum ridge-furrow ratio |
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