| 不同小麦秸秆还田量对水稻生长、土壤微生物生物量及酶活性的影响 |
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| 引用本文： | 韩新忠,朱利群,杨敏芳,俞琦,卞新民.不同小麦秸秆还田量对水稻生长、土壤微生物生物量及酶活性的影响[J].农业环境保护,2012(11):2192-2199. |
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| 作者姓名： | 韩新忠 朱利群 杨敏芳 俞琦 卞新民 |
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| 作者单位： | [1]南京农业大学资源与环境科学学院,南京210095 [2]南京农业大学农学院,南京210095 |
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| 基金项目： | 公益性行业（农业）科研专项课题（201103001） |
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| 摘 要： | 通过大田试验研究了不同小麦秸秆还田量（0、1500、3000、4500、6000kg.hm-2）对水稻生长、土壤微生物量及酶活性的影响。结果表明：秸秆还田后,水稻分蘖数、株高、SPAD及干物质积累量均高于秸秆不还田（对照）,但是未全部达到显著性差异;50%秸秆还田处理增产效果最显著（P〈0.05）,与对照相比,理论增产10.2%,实际增产9.0%;秸秆还田处理显著增加了土壤全氮和速效氮含量,对土壤有机质、有效磷和速效钾含量影响不显著;50%秸秆还田处理对微生物量碳、氮的提高作用最明显（P〈0.05）,分别较对照提高46.0%和90.0%;25%和50%秸秆还田显著提高了土壤脲酶活性（P〈0.05）;25%、50%和75%秸秆还田土壤过氧化氢酶活性较对照提高9.3%、12.1%和8.5%（P〈0.05）;与对照相比,50%秸秆还田土壤蔗糖酶活性提高20.3%（P〈0.05）。鉴于秸秆还田对作物产量和土壤肥力的长期效应以及对土壤微生物生理代谢影响的复杂性,合理秸秆还田量的选择还需进行长期定位试验研究。
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| 关 键 词： | 水稻 秸秆还田 产量 土壤微生物量碳 氮 土壤酶活性 |
Effects of Different Amount of Wheat Straw Returning on Rice Growth,Soil Microbial Biomass and Enzyme Activity |
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| HAN Xin-zhong,ZHU Li-qun,YANG Min-fang,YU Qi,BIAN Xin-min.Effects of Different Amount of Wheat Straw Returning on Rice Growth,Soil Microbial Biomass and Enzyme Activity[J].Agro-Environmental Protection,2012(11):2192-2199. |
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| Authors: | HAN Xin-zhong ZHU Li-qun YANG Min-fang YU Qi BIAN Xin-min |
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| Institution: | 1.College of Resources and Environmental Sciences,Nanjing Agricultural University,Nanjing 210095,China;2.College of Agriculture,Nanjing Agricultural University,Nanjing 210095,China) |
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| Abstract: | The effects of different amount of wheat straw returning on yield of rice,microbial biomass-C,N and soil enzyme activity were studied through a in-situ experiment.The results showed that straw returning increased the number of tillers,plant height,the relative content of chlorophyll and aboveground dry matter,but the effect degree of different amounts were different;compared to the control,50% straw returning treatment significantly increased yield of rice（P0.05）with the increase of 10.2% in the theoretical yield and 9.0% in actual yield,respectively;Straw returning significantly improved soil total nitrogen and available nitrogen,and also had no obvious influence on soil organic matter,available phosphorus and available potassium;50% straw returning treatments enhanced microbial biomass-C,N（P0.05）,and its microbial biomass-C,N were 1.5 times and 1.9 times higher than those from the control;25% and 50% straw returning treatments increased urease activity significantly（P0.05）;25%,50% and 75% straw returning treatments promoted catalase activity with the increase of 9.28%,12.11% and 8.51%（P0.05）;50% straw returning treatment significantly increased invertase activity by 20.30% in comparison to the control（P0.05）.Due to long-term effects on yield of rice and soil fertility of straw returning and the complexity of effects of straw returning on microbial physiological metabolism,long-term in-situ study need to be carried out to better understand the reasonable amount of straw returning. |
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| Keywords: | rice straw returning yield soil microbial biomass-C N soil enzyme activity |
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