SUN Hui,XIE Jia-sui,TANG Ya,et al.Impacts of Hedgerow Intercropping on Soil Water Parameters of Degraded Slopeland in Dry Valley of the Jinsha River[J].Research of Soil and Water Conservation,2004,11(03):25-27,40.
农林复合经营模式对干热河谷退化坡地土壤水分参数的影响
- Title:
- Impacts of Hedgerow Intercropping on Soil Water Parameters of Degraded Slopeland in Dry Valley of the Jinsha River
- Keywords:
- contour hedgerow system; sloping arable land; soil moisture parameters; dry valley of the Jinsha River
- 分类号:
- S152.7;X171.4
- 摘要:
- 土壤水分状况是制约金沙江干热河谷植被恢复和造林的主要因素，改善土壤水分性质是实现该区域生态恢复重建和农业持续发展的必然途径。长期的实验和示范结果显示等高植物篱模式是一种非常适合干旱河谷环境的有极大应用潜力的水土保持和肥力改善、退化生境重建和植被恢复的农林复合经营模式。经过实地研究和实验室分析，结果表明等高固氮植物篱模式0～30 cm和30～70 cm土层容重与对照分别在0.05和0.10水平差异显著，而对70 cm以下土壤无显著差异；0～30 cm土壤水总库容和有效库容分别比对照提高了5.5%和4 2.4%，30～70 cm土壤水总库容和有效库容分别提高了5.8%和32.6%；土壤饱和导水率、吸渗率和稳定入渗率比对照增大，同时比对照土壤提高低吸力段土壤比水容量和土壤饱和水含量，从而有效改善了坡地退化土壤的水分入渗性能和水分状况。
- Abstract:
- Soil moisture status are the dominating contributors to revegetation and reforestation in degraded dry valleys of the Hengduan Mountains,and improvement of soil moisture parameters is the only alternative to ecological restoration and agricultural sustainable development in the region.Contour hedgerow system was proved to be a promising simultaneous agroforestry system for soil conservation,soil fertility improvement and more farming options for sloping agriculture in these valleys.A long-term research work was carried out in the typical dry valley of the Jinsha River. Soil bulk densities of the 0～70 cm layer are ameliorated by the hedgerow intercropping. Total water capacities and available water capacities of 0～30 cm layers under hedgerow system are improved 5.5% and 42.4%,and improved 5.8% and 32.6% in the 30～70 cm layers compared with those of CK,respectively.Soil infiltration rate, saturated hydraulic conductivity and soil specific water capacities of lower suction stage are also increased under the hedgerow intercropping system.
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备注/Memo
收稿日期:2004-5-8;
基金项目:国家重点基础研究发展规划项目（G1998040800）；教育部“振兴行动”计划和四川大学青年科技基金资助
作者简介:孙辉（1971- ），男，博士，副教授，发表论文20余篇，主要从事农林复合经营及环境土壤学方面的研究工作.