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| 黄土丘陵区不同盖度生物结皮土壤抗冲性研究 | |
| 引用本文： | 冉茂勇,赵允格,刘玉兰. 黄土丘陵区不同盖度生物结皮土壤抗冲性研究[J]. 中国水土保持, 2011, 0(12): 43-45 |
| 作者姓名： | 冉茂勇 赵允格 刘玉兰 |
| 作者单位： | 1. 西藏职业技术学院,西藏拉萨,850030 2. 西北农林科技大学水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西杨凌,712100 3. 邯郸市水利水电勘测设计研究院,河北邯郸,056002 |
| 基金项目： | 国家自然科学基金项目(40971174); 中国科学院“西部之光”人才培养计划项目; 西北农林科技大学青年科研骨干项目 |
| 摘 要： | 按藓类植物所占结皮面积比例为盖度划分标准,采用变坡度水槽研究了不同盖度生物结皮对土壤抗冲性及黏结力、有机质、容重等理化属性的影响,探索了生物结皮理化属性与抗冲性之间的关系。结果表明:结皮容重随结皮盖度的增加呈不断减小的变化趋势4,盖度(苔藓盖度>80%)平均结皮容重比1盖度(苔藓盖度<20%)减小了16%;土壤黏结力、有机质、>5 mm水稳性团聚体百分比均随着结皮盖度的增加而增大。生物结皮通过本身分泌的有机凝胶体和多聚糖等胶结物质及菌丝之间的缠绕、包裹等作用,不但改善了土壤本身的理化属性,而且增强了松散土粒与土粒之间的黏结作用;结皮土壤抗冲刷时间随着结皮盖度的增加而延长,土壤侵蚀率随着结皮盖度的增加而减少,证实了结皮的形成和发育减少或避免了土壤侵蚀的发生与发展;生物结皮提高土壤抗冲性的作用主要表现在生物结皮提高了土壤黏结力与团聚体含量上。 |
| 关 键 词： | 生物结皮 盖度 抗冲性 黄土丘陵区 |
Soil Anti-Scourability of Biological Soil Crust with Different Coverage in Loess Hilly Region |
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| RAN Mao-yong,ZHAO Yun-ge,LIU Yu-lan. Soil Anti-Scourability of Biological Soil Crust with Different Coverage in Loess Hilly Region[J]. Soil and Water Conservation In China, 2011, 0(12): 43-45 | |
| Authors: | RAN Mao-yong ZHAO Yun-ge LIU Yu-lan |
| Affiliation: | RAN Mao-yong1,ZHAO Yun-ge2,LIU Yu-lan3(1.Tibet Vocational & Technical College,Lhasa,Tibet 850030,China,2.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau,Institute of Soil and Water Conservation,Northwest A & F University,Yangling,Shaanxi 712100,3.Handan Investigation,Design & Research Institute of WaterConservancy & Hydropower,Handan,Hebei 056002,China) |
| Abstract: | The paper studied the influence of biological soil crust with different coverage to the physicochemical properties of soil anti-scourability,cohesion,organic matter and bulk density,and explored the relationship between the physicochemical properties of biological soil crust and anti-scourability by using variable slope flume,taking the crust proportion of mosses as the standard of coverage division.The outcomes show that: a) bulk density decreases gradually along with the increase of crust coverage and bul... |
| Keywords: | biological soil crust coverage soil anti-scourability Loess Hilly Region |
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