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| 黄土高原水蚀风蚀交错带水分和密度对人工草地土壤呼吸的影响 | |
| 引用本文： | 李学章,邵明安,魏孝荣,贾小旭. 黄土高原水蚀风蚀交错带水分和密度对人工草地土壤呼吸的影响[J]. 水土保持学报, 2011, 25(4): 207-211,216 |
| 作者姓名： | 李学章 邵明安 魏孝荣 贾小旭 |
| 作者单位： | 1. 西北农林科技大学资源环境学院,陕西杨凌,712100 2. 中国科学院地理科学与资源研究所生态系统网络观测与模拟重点实验室,北京,100101 3. 中国科学院水利部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 |
| 基金项目： | 国家自然科学基金(40801111); 国家重点基础研究发展规划(2007CB106803); 陕西省科学技术研究发展计划项目(2011kjxx25); 西北农林科技大学青年学术骨干支持计划 |
| 摘 要： | 为研究黄土高原水蚀风蚀交错带不同水分与密度处理的人工苜蓿和沙打旺草地土壤呼吸特征,分析了人工草地土壤呼吸对水分和密度的响应及其与环境因子的关系。结果表明：水分增加能够显著促进黄土高原水蚀风蚀交错带人工草地土壤呼吸速率（P〈0.01）,土壤呼吸对不同密度处理的响应特征因草地植被类型不同而异,土壤呼吸速率的季节变化对水分增加和密度响应不敏感。土壤水分是土壤呼吸的限制因子,土壤温度与土壤呼吸速率在6-7月份（旱季后期）相关性不明显,8月份后（雨季）相关性增强。土壤呼吸与表层土壤水分和温度有着显著的耦合关系,加水减弱了苜蓿草地土壤呼吸对水分和温度的依赖,而未改变沙打旺草地土壤呼吸对表层土壤水分和温度的依赖。 |
| 关 键 词： | 水蚀风蚀交错带 水分 密度 土壤呼吸 水温耦合 人工草地 |
Effects of Water and Density on Soil Respiration in Vegetated Grassland in Wind-Water Erosion Crisscross Region |
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| LI Xue-zhang,SHAO Ming-an,WEI Xiao-rong,JIA Xiao-xu. Effects of Water and Density on Soil Respiration in Vegetated Grassland in Wind-Water Erosion Crisscross Region[J]. Journal of Soil and Water Conservation, 2011, 25(4): 207-211,216 | |
| Authors: | LI Xue-zhang SHAO Ming-an WEI Xiao-rong JIA Xiao-xu |
| Affiliation: | LI Xue-zhang1,SHAO Ming-an3,WEI Xiao-rong2,JIA Xiao-xu1(1.College of Resources and Environment,Northwest A & F University,Yangling,Shaanxi 712100,2.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau,Institute of Soil and WaterConservation,CAS & MWR,3.Key Laboratory of Ecosystem Network Observation andModeling,Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101) |
| Abstract: | In this paper,soil respiration rate of Medicago sativa L and Astragalus adsurgens Pall grassland in wind-water erosion crisscross region on the Loess Plateau were measured to understand the response of soil respiration in vegetated grassland to water and plant density and to relate soil respiration with environmental factors.The results showed that water adding significantly accelerated soil respiration rate(P<0.01),while the response of soil respiration to plant density varied with plant species.The season... |
| Keywords: | wind-water erosion crisscross region water density soil respiration soil water and temperature coupling vegetated grassland |
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