| 长期施用化肥和秸秆对水稻土碳氮矿化的影响 |
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| 引用本文： | 闫德智,王德建. 长期施用化肥和秸秆对水稻土碳氮矿化的影响[J]. 土壤, 2011, 43(4): 529-533 |
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| 作者姓名： | 闫德智 王德建 |
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| 作者单位： | 1. 南通大学地理科学学院,江苏南通,226001
2. 中国科学院南京土壤研究所,南京,210008 |
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| 基金项目： | 国家自然科学基金项目（40901140和40802084）、中国科学院知识创新工程项目（KZCX2-YW-440）和南通大学自然科学研究项目（08R20）资助 |
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| 摘 要： | 以长期定位试验的土壤为供试材料，通过室内培养试验，研究了长期施用化肥和秸秆对水稻土?C、N矿化和微生物生物量的影响。结果表明长期施用化肥和秸秆增加了土壤?C?矿化量，但降低了可矿化?C?在土壤有机?C?中的比例。长期施用化肥能够增加土壤?N?矿化量，而且增加了可矿化?N?在土壤全?N?中的比例，但配施秸秆不能继续增加?N?矿化量。长期施用化肥和秸秆能够显著增加土壤微生物生物量?C、N?含量，但微生物量在土壤中的比例变化不大。
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| 关 键 词： | 长期施肥；太湖地区；好气培养；可溶性有机碳 |
Carbon and nitrogen mineralization affected by long-term application of chemical fertilizer and rice straw in paddy soil |
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| YAN De-zhi,WANG De-jian. Carbon and nitrogen mineralization affected by long-term application of chemical fertilizer and rice straw in paddy soil[J]. Soils, 2011, 43(4): 529-533 |
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| Authors: | YAN De-zhi WANG De-jian |
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| Affiliation: | School of Geography Science, Nantong University |
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| Abstract: | Based on a long-term fertilization experiment in a paddy soil, this paper studied the effects of long-term application of chemical fertilizer and rice straw on carbon (C) and nitrogen (N) mineralization by incubation experiments. Results showed that long-term application of chemical fertilizer and straw increased carbon mineralization, but decreased the proportion of C mineralized to total organic C. Long-term application of chemical fertilizer increased N mineralization and the proportion of mineralizable N to total N. Compared to chemical fertilizer application alone, added application of rice straw did not increased N mineralization. Long-term application of chemical fertilizer and rice straw significantly increased microbial biomass C and N contents. |
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| Keywords: | Long-term fertilization Taihu region Aerobic incubation Dissolved organic carbon |
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