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不同施肥黑土微生物量氮变化特征及相关因素 预览 被引量:52

Dynamics of microbial biomass N in different fertilized black soil and its related factors
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摘要 研究长期施用两种不同量有机肥(M2、M4)和化肥(NPK)的黑土微生物量N在作物生长季的变化特征.结果表明,施用有机肥黑土微生物量N显著高于施用化肥(NPK)和不施肥(CK),微生物量N季节波动小.微生物量N为M4 25.52~239.12 mg·kg-1,M210.40~94.31 mg·kg-1,NPK 6.27~87.04 mg·kg-1,CK 9.15~69.81 mg·kg-1,同一处理最大值与最小值相差7~14倍.M2、NPK处理微生物量N最大值出现在抽雄吐丝期,M4处理最大值出现在拔节期,CK处理最大值出现在播种期;不同处理微生物量N的差异并未因季节变化及玉米生育时期影响而明显改变.微生物量N的动态变化与极少数黑土生物、理化特性指标动态变化显著相关;微生物量N与黑土生物、理化特性,植物氮、磷、钾有极显著的正相关关系,与土壤含水量、籽粒粗蛋白含量呈显著正相关关系. This paper studied the dynamics of microbial biomass N in a black soil long-term fertilized with farmyard manure(M 2 and M 4)and chemical fertilizer(NPK)during crop growth season.The results showed that the soil microbial biomass N was 25.52~239.12 mg·kg -1 in M 4,10.40~94.31 mg·kg -1 in M 2,6.27~87.04 mg·kg -1 in NPK,and 9.15~69.81 mg·kg -1 in CK.In same treatment,the highest value was 7~14 times higher than the lowest value.Treatments NPK and M 2 had the highest value of microbial biomass N at reproductive growth stage,while M 4 and CK had it at vegetative growth stage.The significant difference of soil microbial biomass N caused by different treatments was not changed with plant growth stages.The dynamics of soil microbial biomass N had a significant correlation some soil biological,physical and chemical properties.A significant positive correlation was found between soil microbial biomass N and soil biological,physical and chemical properties,plant N,P and K contents,soil moisture,and grain crude protein.
作者 李东坡 陈利军 武志杰 朱平 任军 梁成华 彭畅 高红军 LI Dongpo 1,3,CHEN Lijun1,WU Zhijie1,ZHU Ping2,REN Jun2,LIANG Chenghua3,PENG Chang2,GAO Hongjun2 ( 1Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang 110116,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10期 1891-1896,共6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 长期施肥 微生物量氮 变化特征 相关因素 Black soil, Long-term fertilization, Microbial biomass N, Dynamic characters, Related factors.
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参考文献31

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二级参考文献8

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