| 垄沟集雨对紫花苜蓿草地土壤水分、容重和孔隙度的影响 |
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| 引用本文： | 寇江涛,师尚礼,王琦,尹国丽.垄沟集雨对紫花苜蓿草地土壤水分、容重和孔隙度的影响[J].中国生态农业学报,2011,19(6):1336-1342. |
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| 作者姓名： | 寇江涛 师尚礼 王琦 尹国丽 |
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| 作者单位： | 甘肃农业大学草业学院兰州 730070;草业生态系统教育部重点实验室 甘肃省草业工程实验室中-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(201003023)、全国种质资源保种项目(NB2130135)和国家现代牧草产业技术体系建设专项(CARA-35)资助 |
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| 摘 要： | 在旱作条件下, 将垄沟集雨措施应用于紫花苜蓿种植, 研究沟垄宽比和覆膜方式对2年龄紫花苜蓿草地土壤水分状况、土壤容重及孔隙度的影响。结果表明: 全越冬期, 膜垄和土垄处理0~120 cm土壤水分平均散失量分别低于CK(平作)28.43 mm和13.61 mm。膜垄处理整个集雨期的蓄墒增加率为59.03%~99.27%, 产流效率为53.43%~91.72%; 2009年集雨前期(4月上旬~6月上旬)土垄处理的蓄墒增加率、产流效率分别为1.92%~2.74%和1.71%~2.55%, 2009年集雨中后期(6月中旬~9月下旬)土垄处理的蓄墒增加率、产流效率较集雨前期显著升高, 分别为8.85%~36.77%和8.01%~35.82%; 膜垄和土垄处理的蓄墒增加率、产流效率均随垄面宽度增加而显著增加, 且膜垄的蓄墒增加率、产流效率显著高于土垄处理。垄沟集雨种植能够显著降低0~40 cm土壤层容重, 且0~20 cm土壤层容重降幅表现为膜垄大于土垄。垄沟集雨种植也能够显著增加0~40 cm土壤层孔隙度, 且0~20 cm土壤层孔隙度增幅表现为膜垄大于土垄。
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| 关 键 词： | 紫花苜蓿 垄沟集雨 沟垄宽比 土壤水分 容重 孔隙度 蓄墒增加率 产流效率 |
| 收稿时间： | 2010/11/11 0:00:00 |
| 修稿时间： | 2011/5/31 0:00:00 |
Effect of ridge/furrow rain harvesting on soil moisture, bulk density and porosity in Medicago sativa field |
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| KOU Jiang-Tao,SHI Shang-Li,WANG Qi and YIN Guo-Li.Effect of ridge/furrow rain harvesting on soil moisture, bulk density and porosity in Medicago sativa field[J].Chinese Journal of Eco-Agriculture,2011,19(6):1336-1342. |
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| Authors: | KOU Jiang-Tao SHI Shang-Li WANG Qi and YIN Guo-Li |
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| Institution: | College of Grassland Science, Gansu Agricultural University, Lanzhou 730070, China;Key Ecosystem Laboratory of the Ministry of Education;Pratacultural Engineering Laboratory of Gansu Province;Sino-US Center for Grazingland Ecosystem Sustainability, Lanzho;College of Grassland Science, Gansu Agricultural University, Lanzhou 730070, China;Key Ecosystem Laboratory of the Ministry of Education;Pratacultural Engineering Laboratory of Gansu Province;Sino-US Center for Grazingland Ecosystem Sustainability, Lanzho;College of Grassland Science, Gansu Agricultural University, Lanzhou 730070, China;Key Ecosystem Laboratory of the Ministry of Education;Pratacultural Engineering Laboratory of Gansu Province;Sino-US Center for Grazingland Ecosystem Sustainability, Lanzho;College of Grassland Science, Gansu Agricultural University, Lanzhou 730070, China;Key Ecosystem Laboratory of the Ministry of Education;Pratacultural Engineering Laboratory of Gansu Province;Sino-US Center for Grazingland Ecosystem Sustainability, Lanzho |
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| Abstract: | Experiment on rain harvesting under dry farming was conducted to determine the effects of ridge/furrow width ratio and mulching modes on soil moisture, soil bulk density and porosity in Medicago sativa cultivation fields. Based on the study, average water loss in the 0~120 cm soil layer was lower by 28.43 mm for plastic film covered ridges and 13.61 mm for compacted bare soil ridges than CK (flat field). The increase rate of rain water storage was 59.03%~99.27% in plastic film covered ridges with runoff generation efficiency of 53.43%~91.72% during the whole rainy season. From early April to early June (when was prior to 2009 rainfall collection period), the increase rate of rain water storage in compacted bare soil ridges was 1.92%~2.74% with corresponding runoff generation efficiencies of 1.71%~2.55%. From mid June to late September (when was mid-to-late rainfall collection period), the increase rate of rain water storage (8.85%~36.77%) and runoff generation efficiency (8.01%~35.82%) increased significantly. The increase rate of rain water storage and runoff generation efficiency on both plastic-film covered and soil-compacted ridges increased with increasing ridge surface area. However, increment in the increase rate of rain water storage and runoff generation efficiency on plastic-film covered ridges was remarkably higher than that on compacted bare soil ridges. Soil bulk density in the 0~40 cm soil layer significantly dropped in ridge/furrow rain harvesting system. The degree of drop in soil bulk density in plastic film covered ridges was higher than that in compacted bare soil ridges in the 0~20 cm soil layer. Accordingly, soil porosity in the 0~40 cm soil layer significantly increased in ridge/furrow rain harvesting system. Also the degree of rise in soil porosity in plastic film covered ridges was larger than that in compacted bare ridges in the 0~20 cm soil layer. |
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| Keywords: | Medicago sativa Ridge/furrow rain harvest Ridge/furrow width ratio Soil moisture Soil bulk density Soil porosity Rain water storage increasing rate Runoff generation efficiency |
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