生态学杂志2011，Vol.30Issue(9)：1962-1968,7.
不同年限免耕秸秆覆盖对土壤活性有机碳和碳库管理指数的影响
Soil labile organic carbon and carbon pool management index as affected by different years no-tilling with straw mulching.
摘要
Abstract
A field experiment (2000-2010) was conducted at the Heyang Dryland Fanning Experimental Station in Shaanxi Province of China to study the effects of no-tillage with straw mulching on soil labile organic carbon ( LOC) and carbon management index (CMI) , and further, to search the appropriate years for no-tillage with straw mulching. Five treatments of different years no-tillage with straw mulching, I. E. , 1 year (S1) , 3 years (S3) , 5 years (S5) , 8 years ( S8) , and 10 years (S10) , and two treatments of conventional cultivation (CK) and 10 years no-tillage with zero straw mulch ( CKq ) were installed. In treatments S1, S2, S5, S8, and S10, the organic carbon (TOC) content in 0-10 cm soil layer increased by 7. 6% , 13. 5% , 25. 4% , 48. 6% , and 79. 0% , LOC content increased by 40. 1% , 51. 5% , 102. 4% , 78. 4% , and 75. 3% , and CMI increased by 49. 4% , 61. 2% , 126. 8% , 85. 4% and 75. 3% , respectively, compared with CK. The spring maize grain yield, total nitrogen, total phosphorus, and available phosphorus had significant correlations with soil LOC and CMI (P <0. 01) , but less correlation with soil TOC. As compared to soil TOC, soil LOC and CMI could more rapidly and objectively reflect the effectsof no-tillage with straw mulching on soil carbon pool and maize grain yield, and be used as the indices to assess the ecological effects of no-tillage with straw mulching. The appropriate years for no-tillage with straw mulching in Weibei dryland area of China could be 5-8 years.关键词
免耕/秸秆/覆盖/活性有机碳/碳库管理指数/春玉米Key words
no-tillage/ straw/ mulching/ labile organic carbon/ carbon pool management index/ spring maize.分类
农业科技引用本文复制引用
蔡太义,黄耀威,黄会娟,贾志宽,李立科,杨宝平,韩思明..不同年限免耕秸秆覆盖对土壤活性有机碳和碳库管理指数的影响[J].生态学杂志,2011,30(9):1962-1968,7.基金项目
国家“十一五”科技支撑项目(2006BAD29B03)资助. （2006BAD29B03）
