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| 封育草地土壤生物结皮对水分入渗与植物多样性的影响 | |
| 引用本文： | 杨秀莲,张克斌,曹永翔. 封育草地土壤生物结皮对水分入渗与植物多样性的影响[J]. 生态环境, 2010, 19(4): 853-856 |
| 作者姓名： | 杨秀莲 张克斌 曹永翔 |
| 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 |
| 基金项目： | 国家林业局荒漠化定位监测项目 |
| 摘 要： | 盐池县柳杨堡乡从2000年开始采取封育措施,长期的无人为干扰使封育区内产生土壤生物结皮,结皮对水分有一定影响,进而影响封育区植被的恢复。采用双环入渗法分析生物结皮对土壤水分的影响,并通过对人工封育区内的植被调查测定去除土壤结皮前后的植物多样性变化。结果表明：有生物结皮覆盖的土壤入渗曲线的最高峰比无生物结皮覆盖的低约5 cm,有生物结皮覆盖的土壤初始入渗速率为0.8 cm·min^-1,而无生物结皮覆盖的土壤初始入渗速率为2.6 cm·min^-1,随着封育年限的增加,土壤生物结皮的覆盖面积及厚度逐年增加,结构也更紧密,影响土壤的水分入渗,不利于植被的生长,而通过对封育区内新翻耕土层和未翻耕的土层的植物多样性比较,新翻耕的土层中的植物多样性指数明显高于未翻耕土层。因此对封育区内采取适度翻耕,能够减少生物结皮对土壤水分入渗的负面影响,能够更有效的利用降水,促进植被恢复。 |
| 关 键 词： | 土壤生物结皮 水分入渗 植物多样性 |
Effects of biological soil crusts on water infiltration and plant diversity in fenced grassland soil |
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| YANG Xiulian,ZHANG Kebin,CAO Yongxiang. Effects of biological soil crusts on water infiltration and plant diversity in fenced grassland soil[J]. Ecology and Environmnet, 2010, 19(4): 853-856 | |
| Authors: | YANG Xiulian ZHANG Kebin CAO Yongxiang |
| Affiliation: | YANG Xiulian,ZHANG Kebin,CAO Yongxiang College of Soil , Water Conservation//Soil , Water Conservation Key Lab.of Ministry of Education,Beijing Forestry University,Beijing 100083,China |
| Abstract: | In 2000,Liuyangpu of Yanchi county built fenced areas to protect grassland ecosystems from disturbance and to study the establishment of microbiotic soil crusts and their affect on soil moisture and vegetative restoration.This paper analyzes how biological crust affect soil moisture by double ring infiltration method,and measures the change of plant diversity before and after dislodgement of crusts in Liuyangpu artificial closure area.The results show that crust soils have lower infiltration curves compared... |
| Keywords: | biological crust water infiltration plant diversity |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |