菜园土壤微生物生态特征与土壤理化性质的关系

应用生态学报

菜园土壤微生物生态特征与土壤理化性质的关系

黎宁1;李华兴1;朱凤娇2;刘远金1;邝培锐2

¹华南农业大学资源环境学院，广州 510642；²广州市白云区农业局，广州 510405

收稿日期:2005-04-26 修回日期:2005-08-08 出版日期:2006-02-18 发布日期:2006-02-18

Relationships between soil microbial ecological characteristics and physical-chemical properties of vegetable garden soil

LI Ning¹;LI Huaxing¹;ZHU Fengjiao²;LIU Yuanjin¹;KUANG Peirui²

¹College of Resources and Environmental Science,South China Agricultural University,Guangzhou 510640,China;²Agricultural Bureau of Baiyun District,Guangzhou 510405,China

Received:2005-04-26 Revised:2005-08-08 Online:2006-02-18 Published:2006-02-18

摘要/Abstract

摘要： 对广州白云区64个菜园土壤样本的研究表明，微生物碳与土壤全氮、碱解氮、有效钾、阳离子交换量和有机质,微生物氮与土壤全氮、全磷、阳离子交换量及有机质,土壤基础呼吸与土壤全氮、碱解氮、全钾、阳离子交换量及有机质,AWCD值与全氮及有机质含量,以及Shannon多样性指数与全氮和阳离子交换量均呈显著正相关关系.较低的碱解氮含量使土壤微生物碳、土壤基础呼吸和呼吸商的值升高，过高的碱解氮则使呼吸商下降；过高的土壤有效磷降低微生物碳、微生物氮和微生物呼吸商.有效磷/碱解氮比值过高降低了土壤微生物碳、微生物氮、微生物碳氮比及土壤基础呼吸.土壤微生物生态特征与土壤理化性质关系密切,有效养分过高及养分比例不适当对土壤微生物均存在不利影响.

Abstract: The study on the 64 vegetable garden soil samples in the Baiyuan District of Guangzhou City showed that there were significantly positive correlations of soil microbial biomass carbon (C_mic) with soil total N,alkali-hydrolygable N,available K,cation exchange capacity (CEC) and organic matter (OM),of soil microbial biomass nitrogen (N_mic) with soil total N,total P,CEC and OM,of soil basal respiration (SBR) with soil total N,alkali-hydrolygable N,available K,CEC and OM,of AWCD with soil total N and OM,and of Shannon diversity index with soil total N and CEC.Low alkali-hydrolygable N increased C_mic,SBR,and metabolic quotient (qCO₂),while high alkali-hydrolygable N decreased qCO₂.High available P decreased C_mic,N_micand microbial quotient,and a high ratio of available P to alkali-hydrolygable N was related to the decrease of C_mi_c,N_mic,C_mic/N_micand SBR.It was suggested that there were significant correlations between soil microbial ecological characteristics and physico-chemical properties,and excessive available nutrients or inappropriate ratios of alkali-hydrolygable N to available P in soil were harmful to soil microbes.

Key words: Chemical binding form, Sequential extraction method, Transference and enrichment

黎宁1;李华兴1;朱凤娇2;刘远金1;邝培锐2. 菜园土壤微生物生态特征与土壤理化性质的关系[J]. 应用生态学报.

LI Ning¹;LI Huaxing¹;ZHU Fengjiao²;LIU Yuanjin¹;KUANG Peirui² . Relationships between soil microbial ecological characteristics and physical-chemical properties of vegetable garden soil[J]. Chinese Journal of Applied Ecology.