| 覆草旱作对稻田土壤活性有机碳的影响 |
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| 引用本文： | 王栋,李辉信,李小红,王静,胡锋.覆草旱作对稻田土壤活性有机碳的影响[J].中国农业科学,2011,44(1):75-83. |
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| 作者姓名： | 王栋 李辉信 李小红 王静 胡锋 |
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| 作者单位： | (南京农业大学资源与环境科学学院) |
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| 基金项目： | 国家“863”计划重大专项(2002AA2Z4331) |
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| 摘 要： | 目的]研究覆草旱作和免耕覆草旱作稻田土壤总有机碳、活性有机碳含量和碳库管理指数的特征.方法]在江西省余江县水稻原种场的双季稻田,设置常规水作、裸地旱作、覆草旱作、免耕裸地旱作和免耕覆草旱作5个处理.于第5年晚稻收获期,采集以上处理的耕层土壤样品,测定了土壤总有机碳和活性有机碳含量.结果]与常规水作相比,覆草旱作和...
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| 关 键 词： | 水稻旱作 稻草覆盖 免耕 土壤活性有机碳 碳库管理指数 |
| 收稿时间： | 2010-05-02; |
Soil Labile Organic Carbon as Affected by Non-flooded Rice Cultivation with Straw Mulching Under Different Tillages |
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| WANG Dong,LI Hui-xin,LI Xiao-hong,WANG Jing,HU Feng.Soil Labile Organic Carbon as Affected by Non-flooded Rice Cultivation with Straw Mulching Under Different Tillages[J].Scientia Agricultura Sinica,2011,44(1):75-83. |
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| Authors: | WANG Dong LI Hui-xin LI Xiao-hong WANG Jing HU Feng |
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| Affiliation: | WANG Dong,LI Hui-xin,LI Xiao-hong,WANG Jing,HU Feng(College of Resources and Environmental Sciences,Nanjing Agricultural University,Nanjing 210095) |
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| Abstract: | 【Objective】 The objective of this study was to investigate the characteristics of soil total organic carbon, labile organic carbon and carbon pool management index under non-flooded rice cultivation with straw mulching, and no-tillage and non-flooded rice cultivation with straw mulching. 【Method】 A field experiment was conducted since 2003 in double-rice cropping system in the Rice Yuanzhong Farm in Yujiang County, Jiangxi Province in southeast China. Soil samples at 0-15 cm depth were collected at the late-season rice harvest period in 2007, and contents of soil total organic carbon and different fractions of labile organic carbon under different rice cultivations were determined. The rice cultivations included conventional flooded rice cultivation (CF), non-flooded rice cultivation with zero straw mulching (ZM), non-flooded rice cultivation with straw mulching (SM), no-tillage and non-flooded rice cultivation with zero straw mulching (N-ZM), and no-tillage and non-flooded rice cultivation with straw mulching (N-SM). 【Result】 Compared with CF, SM and N-SM could significantly increase soil total organic carbon content, particulate organic carbon (53-2 000 μm) content, hot water-extractable organic carbon content, readily oxidizable organic carbon (oxidized by 333 mmol?L-1 KMnO4) content, and the percentage of labile organic carbon to soil total organic carbon, and soil organic carbon pool management index (CPMI). However, ZM could significantly decrease the parameters mentioned above compared to CF.【Conclusion】 As a novel water-saving technique and straw management, SM and N-SM applied to late-season rice cropping system might be an alternative to CF for improving and increasing soil fertility under double-rice cropping system, in the seasonal drought region of southeast China. |
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| Keywords: | non-flooded rice cultivation straw mulching no-tillage soil labile organic carbon carbon pool management index |
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