| 青海大通不同退耕还林时间梯度对土壤物理性状的影响 |
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| 引用本文： | 李文忠,张伟华,张昊,周心澄,王荣秀. 青海大通不同退耕还林时间梯度对土壤物理性状的影响[J]. 干旱区资源与环境, 2005, 19(3): 137-140 |
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| 作者姓名： | 李文忠 张伟华 张昊 周心澄 王荣秀 |
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| 作者单位： | 北京林业大学水土保持学院,水土保持与荒漠化防治教育部重点实验室,北京,100083;青海省大通县实验林场,810100,桥头镇 |
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| 基金项目： | “十五”国家科技攻关项目“退耕还林还草工程区水土保持型植被建设技术研究与示范”(2001BA510B01) |
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| 摘 要： | 本文主要探讨不同退耕还林时间梯度上土壤物理性质的变化规律及其对土壤物理性状的改良作用,研究表明,退耕地营林后对土壤各种物理性状影响极大,使其能在短时间内土壤向森林土壤定向演化,且时间越长,土壤结构改善越明显:总孔隙度增大、土壤水气热协调性增强、土壤持水能力及其供水肥能力加强,有利于涵养水分和保持水土,土壤的抗蚀能力显著增强。
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| 关 键 词： | 时间梯度 物理性状 定向演化 |
| 文章编号： | 1003-7578(2005)03-137-04 |
| 修稿时间： | 2005-01-01 |
Effects of Different Time Gradient of Cropping Land Conversion to Forest on Soil Physical Properties in DaTong County of QingHai |
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| LI Wen-zhong,ZHANG Wei-hua,ZHANG Hao,ZHOU Xin-cheng,WANG Xiu-rong. Effects of Different Time Gradient of Cropping Land Conversion to Forest on Soil Physical Properties in DaTong County of QingHai[J]. Journal of Arid Land Resources and Environment, 2005, 19(3): 137-140 |
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| Authors: | LI Wen-zhong ZHANG Wei-hua ZHANG Hao ZHOU Xin-cheng WANG Xiu-rong |
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| Abstract: | The researchmainly investigated the variation and improvement of soil physical properties under different time gradient of cropping land to forest. The results showed that there had a huge influence on soil physical properties after converting cropping land to forest, and made it evolve directively to forest soil in short time. With the continuance of the time, soil structure was improved obviously, total porosity increased, and its ability of water retention, nutrient supplement and anti-erosionwas improved. |
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| Keywords: | time gradient physical properties directive evolution |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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