| 西藏高寒退化草地草浆地膜覆盖的保水作用研究 |
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| 引用本文： | 余成群,武俊喜,关法春. 西藏高寒退化草地草浆地膜覆盖的保水作用研究[J]. 草业学报, 2013, 22(2): 318-321. DOI: 10.11686/cyxb20130241 |
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| 作者姓名： | 余成群 武俊喜 关法春 |
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| 作者单位： | 1.中国科学院地理科学与资源研究所,北京 100101;2.西藏高原草业工程技术研究中心,西藏 拉萨 850000;3.西藏大学农牧学院园艺系,西藏 林芝 860000 |
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| 基金项目： | 西藏自治区草业专项"一江两河地区饲草高效生产与利用关键技术研究与示范";西藏自治区自然基金项目"西藏农牧一体化理论的构建及技术途径"和西藏重点科研项目 |
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| 摘 要： | 试验采用对比方法研究草浆地膜覆盖对退化草地土壤的保水作用,以期明确草浆地膜的草地保水理论依据和保水效果。结果表明,与对照相比,草浆地膜覆盖下的土壤表面相对湿度、土壤表面温度、土壤紧实度和土壤含水量等指标均优于对照处理。其中5月和7月的土壤平均含水量分别为22.87%和20.21%,0和5 cm土层处的土壤平均紧实度分别为245和948 kPa,以上指标与对照相比差异显著(n=5,P<0.05)。草浆地膜覆盖具有物理隔热和阻碍水分蒸发的作用,土壤保水效果良好。
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| 关 键 词： | 草浆地膜 保水 草地 |
| 收稿时间： | 2012-02-17 |
Influence of straw pulp film mulching on water conservation of alpine degraded meadow in Tibet |
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| YU Cheng-qun , WU Jun-xi , GUAN Fa-chun. Influence of straw pulp film mulching on water conservation of alpine degraded meadow in Tibet[J]. Acta Prataculturae Sinica, 2013, 22(2): 318-321. DOI: 10.11686/cyxb20130241 |
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| Authors: | YU Cheng-qun WU Jun-xi GUAN Fa-chun |
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| Affiliation: | 1.Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;2.Engineering and Technology Research Center for Prataculture on the Tibet Plateau, Lhasa 850000, China;3.Department of Horticulture, Agricultural and Animal Husbandry College, Tibet University, Linzhi 860000, China |
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| Abstract: | The use of plastic film for mulching is very extensive because of its excellent properties and low cost. However, the massive use of plastic film poses an environmental risk, and in order to offer an alternative for water conservation of grassland soil, a comparison of straw pulp film and non-mulching was used to research the function of film in the conservation of soil water in alpine degraded meadows of Tibet. The relative humidity at the soil surface, soil temperature, soil compaction and water content in the straw pulp film treatment were better than in the CK, and the water content in May and June were 22.87% and 20.21% respectively, which were significantly better than the CK (n=5, P<0.05). At the same time, soil compaction at the surface and at 5 cm were 245 and 948 kPa, significantly different (n=5, P<0.05) from the CK. Mulching with straw pulp film gave a physical insulation to heat and obstruction to water evaporation, which helped retain soil moisture. |
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