水土保持通报2012，Vol.32Issue(4)：1-4,15,5.
黄土丘陵区坡地侵蚀对土壤呼吸的影响
Effects of Erosion on Soil Respiration on Slopeland in Loess Hilly Region
摘要
Abstract
To understand the effects of erosion on soil respiration（R,）, we analyzed temporal variations of Rs on the slope lands and its relationship with soil temperature and moisture under artificial stimulated erosion conditions（top soils removed at the depths of 0, 5, 10 em, referred to as Eo, E5 and El0） with a dynamic closed chamber. Two type of lands in which the fertility levels differed distinctly were chosen to deploy the experiments. The results indicate that with similar temperature and rainfall, the rates of R, were affected sig- nificantly by erosion and the affecting degree was related closely to the fertility level of the land. Comparing to the control（original soil without removal of top soil）, the Rs rates of the soils with the erosion level of Es decreased by 32~ and 14~,/00 in the fertile and poor soils, respectively. The rainfall stimulated the Re rates and amplified the effects of erosion on the R, rates. Soil moisture contents were closely correlated with the Rs rates, and conversely, the soil temperature was not. Soil moisture was the main controlling factor responsi- ble for the variations of soil respiration rates during water erosion events. The results suggested that the effects of erosion on Re rates should be considered in understanding and estimating carbon loss in the loess hilly region. Soil erosion may alter the carbon balance through dynamic changes of R~ in these ecosystems, which could have important negative consequences for ecosystem functions and sustainability.关键词
土壤呼吸/表土流失/黄土丘陵区Key words
soil respiration/surface soil loss/loess hilly region分类
农业科技引用本文复制引用
裴会敏,许明祥,脱登峰..黄土丘陵区坡地侵蚀对土壤呼吸的影响[J].水土保持通报,2012,32(4):1-4,15,5.基金项目
国家自然科学基金项目“黄土高原深层土壤有机碳固存及对土地利用/覆被变化的响应” （）
中科院战略性先导科技专项子课题“西北农田土壤固碳潜力与速率研究” （）
中科院知识创新重要方向项目“黄土高原退耕还林还草对陆地生态系统C循环的影响” （）
