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长期培肥黑土微生物量碳动态变化及影响因素 预览 被引量:68

Dynamics of microbial biomass C in a black soil under long-term fertilization and related affecting factors
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摘要 以东北典型黑土区长期采用2种不同量有机肥(M2、M4)、化肥(NPK)和不施肥(CK)4种方式培肥土壤为研究对象,对生长季微生物量碳的动态变化进行研究.结果表明,施用有机肥,微生物量碳显著高于施用化肥和不施肥,容量在620 mg·kg-1以上.在各处理中,微生物量碳大小顺序为M4>M2>NPK≥CK.M2、M4微生物量碳最大峰值出现在抽雄吐丝期,NPK最大峰值出现在播种期,CK最大峰值出现在蜡熟期,季节性变化平稳.施肥数量和种类不同所引起的微生物量碳的差异,并未因季节变化及玉米生育时期影响而改变.微生物量碳的动态变化与绝大多数黑土生物、理化特性指标动态变化无显著相关性;与黑土生物、理化特性,植物氮、磷、钾及作物籽粒粗蛋白含量之间存在较好的正相关性. The effect of long-term fertilization on the dynamics of microbial biomass C in a typical black soil of Northeastern China was studied in a field trail treated by different fertilizations.The results showed that the amount of soil microbial biomass C under different fertilizations varied significantly with growth stages.It was the highest in farmyard manure (M_2 and M_4) treatments,with a less seasonal fluctuation,second in NPK treatment,the peak at sowing period,and the lowest in CK,the peak at wax maturity stage.No significant correlation was found between the dynamic changes of soil microbial biomass C and soil biological,physical and chemical properties in all treatments,but the correlation of soil microbial biomass C with the contents of N,P and K in plants and that of crude protein in grain was significantly positive.
作者 李东坡 武志杰 陈利军 朱平 任军 彭畅 梁成华 LI Dongpo 1,3 ,WU Zhijie 1,CHEN Lijun 1,ZHU Ping 2,REN Jun 2,PENG Chang 2,LIANG Chenghua 3 ( 1Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang 110016,China; 2Institute of Soil and Fertilizer,Jilin Agricultural Academy of Sciences,Gongzhuling 136100,China; 3College of Land and Environment,Shenyang Agricultural University,Shenyang 110161,China)
出处 《应用生态学报》 CAS CSCD 2004年第8期 1334-1338,共5页 Chinese Journal of Applied Ecology
基金 国家重点基础研究发展计划(973计划),中国科学院知识创新工程项目
关键词 黑土 有机肥 微生物量 生长季 动态变化 Black soil, Farmyard manure, Microbial biomass, Growth season, Dynamic change.
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参考文献20

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