农业环境科学学报2011，Vol.30Issue(9)：1822-1829,8.
连续种植超级稻对土壤有机碳及团聚体稳定性的影响
Effects of Continuous Super Rice Planting on Organic Carbon and Aggregates Stability
摘要
Abstract
In this study, Soil organic carbon(SOC), soil aggregates and SOC distribution in aggregates were investigated using cross-site study, the top-soil samples were from three sites of continuous super-rice planting experiments in the mid-lower Yangtze River. Undisturbed top-soil samples were separated to different size aggregates by low-energy ultra-sonic dispersion procedure. Soil aggregates, variation of SOC and SOC distribution in aggregates were analyzed to illuminate the effects on aggregates stability and SOC reserves after continuous super-rice planting. The content of SOC decreased in three sampling sites after continuous super-rice planting, deceasing from 3% to 14%; SOC content was higher in aggregare of 2 000-200 μm and<2 μm than in the others, and the content of SOC decreased after continuous super-rice planting in these aggregates. The distribution of aggregates was dominated by 2 000-200 μm and 200-20 μm fractions, and the content of 2 000-200 μa macro-aggregates and soil aggregate stability increased after continuous super-rice planting. Decreasing SOC was a soil dynamics after continuous super-rice planting in short time, but did not change the carbon storage potential in long time.关键词
超级稻/水稻土/有机碳/团聚体稳定性Key words
super rice/ paddy soil/ SOC/ aggregate stability分类
资源环境引用本文复制引用
孟远夺,潘根兴..连续种植超级稻对土壤有机碳及团聚体稳定性的影响[J].农业环境科学学报,2011,30(9):1822-1829,8.基金项目
国家自然科学基金重点项目(40830528) （40830528）
