| 短期免耕对稻田土壤活性有机碳库的影响 |
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| 引用本文： | 展茗,汪金平,乐丽鑫,江洋,余键,潘圣刚.短期免耕对稻田土壤活性有机碳库的影响[J].湖北农业科学,2009,48(4). |
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| 作者姓名： | 展茗 汪金平 乐丽鑫 江洋 余键 潘圣刚 |
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| 作者单位： | 华中农业大学农业部华中作物生理生态重点实验室,武汉,430070 |
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| 基金项目： | 湖北省农业科技创新中心资助项目 |
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| 摘 要： | 采用量化的方法研究了短期免耕对土壤有机碳库数量和质量的影响.结果表明,与翻耕相比.短期免耕处理没有引起土壤总有机碳和可矿化态碳的显著变化;但在水稻孕穗期免耕极显著地增加了土壤可溶性有机碳的含量,提高了可溶性碳库效率;在水稻收获时,免耕处理的易氧化态碳及其效率、微生物量碳、碳库活度、碳库管理指数是翻耕处理的1.21、1.19、1.14、1.30、1.33倍;水稻孕穗期及收获时.免耕处理土壤微生物代谢熵(qC02)显著比翻耕处理降低了0.11倍.可见短期免耕能引起土壤活性有机碳的显著变化,且微生物代谢熵(qCO2)和碳库管理指数更能灵敏地指示土壤有机碳库的变化.因而可作为评价土壤质量的重要指标.
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| 关 键 词： | 稻田 免耕 土壤活性有机碳 |
Effects of Short-term No-tillage on Soil Carbon Pool in Paddy Fields |
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| ZHAN Ming,WANG Jin-ping,YUE Li-xin,JIANG Yang,YU Jian,PAN Sheng-gang.Effects of Short-term No-tillage on Soil Carbon Pool in Paddy Fields[J].Hubei Agricultural Sciences,2009,48(4). |
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| Authors: | ZHAN Ming WANG Jin-ping YUE Li-xin JIANG Yang YU Jian PAN Sheng-gang |
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| Institution: | Key Laboratory of Huazhong Crops Physiology;Ecology and Production;Ministry of Agriculture;Huazhong Agricultural University;Wuhan 430070;China |
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| Abstract: | Effects of short-term no-tillage on soil carbon pool in paddy fields were studied in 2007 by quantification method to provide data for evaluating no-tillage in paddy fields. The results showed as the following. Compared with tillage treatment (CK), no-tillage treatment(NT) did not change the total soil organic carbon(TOC) and potential mineralizable carbon(PMC) significantly; while the dissolved organic carbon (DOC) of NT increased significantly more than that of CK in the stage of panicle differentiation, ... |
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| Keywords: | paddy field no-tillage active soil organic carbon |
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