生态环境学报2016，Vol.25Issue(4)：563-568,6.DOI:10.16258/j.cnki.1674-5906.2016.04.003
不同稻草还田模式下双季稻土壤有机碳及碳库管理指数研究
Organic Carbon and Carbon Pool Management Index in Soil under Different Rice Straw Returning Way in Double-croping Paddy Fields
摘要
Abstract
A 3-year field located experiment was conducted to study the effects of different rice straw returning ways on soil organic carbon, active organic carbon and soil carbon pool management index (CPMI) in different layer and to investigate a efficient carbon management mode under a double rice-cropping system. Five treatments included no straw and tillage (CK), incinerated burned straw returning and tillage (BST), coverd rice straw returning and no tillage and high stake (SNTH), coverd rice straw returning and no tillage and bury straw (SNTB), rice straw returning and tillage and bury straw (STB). The result indicated that total organic carbon (TOC) and active organic carbon (AOC) pool were decreased with deeper layer. Whether tillage or not, 0~15 cm soil organic carbon and active organic carbon contents was significantly improved by straw incorporation. The 0~5 cm soil organic carbon, active organic carbon and soil carbon pool management index was increased significantly by coverd rice straw returning with no tillage measure. Based on this mode of rice straw returning, then burying straw in winter was beneficial to soil organic carbon and can increase carbon manegement index in 5~15 cm soil layer. This is an effectively way to compensate for the shortage of organic carbon accumulation in surface under the straw mulching and no tillage treatment. It is considered a suitable straw returning technology model for double-cropping systems.关键词
双季稻/稻草还田/有机碳/碳库管理指数Key words
double-crop rice system/rice straw returning to paddy soil/organic carbon/carbon pool management index分类
农业科学引用本文复制引用
彭华,纪雄辉,吴家梅,朱坚,田发祥..不同稻草还田模式下双季稻土壤有机碳及碳库管理指数研究[J].生态环境学报,2016,25(4):563-568,6.基金项目
国家科技支撑计划项目（2013BAD11B02）；国家自然科学基金项目 （）
