干旱区生态环境知识资源中心(Arid): 砂龄对砂田土壤微生物区系及理化性状的影响

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	砂龄对砂田土壤微生物区系及理化性状的影响
其他题名	Effect of different gravel mulched years on soil microflora and physicochemical properties in gravel-sand mulched field
	逄蕾; 路建龙; 周茅先; 肖洪浪; 樊志龙; 柴守玺
来源期刊	干旱地区农业研究
ISSN	1000-7601
出版年	2017
卷号	35 期号:4 页码:185-192
中文摘要	以不同砂龄(砂田覆盖年限分别为1、6、12、19 a和25 a)的砂田为研究对象,对砂田土壤混合层、根系密集层、淋溶层和钙积层的土壤微生物区系及影响土壤微生物的因素进行研究。结果表明: (1)砂田土壤微生物组成中,以细菌为主,放线菌次之,真菌最少;随土壤剖面深度的增加,土壤微生物总数迅速减少,这主要是由于细菌数量迅速减少所致;受根系分布的影响,根系密集层的微生物数量高于只有少量根系分布的混合层。(2)细菌和放线菌的数量在作物生长期高于作物非生长期,而真菌的数量则相反。(3)细菌和真菌在砂龄约为6 ~ 12 a的砂田中最多,随砂田覆盖时间的增加,砂田逐渐老化,数量逐渐减少;而放线菌的数量反之,在砂龄约为6 ~ 12 a的砂田中最少,随砂田覆盖时间的增加而增加。(4)砂田土壤微生物数量与土壤水分含量、pH值和覆盖时间有很好的相关性,土壤养分中的全C含量是限制砂田土壤微生物数量的重要因子。
英文摘要	Soil microflora and physicochemical properties at soil and gravel-sand mixed layer (SGSML),roots denseness layer (RDL),eluvial layer (EL) and Calcic horizon layer (CAL) in gravel-sand mulched field (GSMF) with different gravel mulched years (1,6,12,19 a and 25 a respectively) were investigated. The results indicated that (1) Among the soil microorganisms of the GSMF,bacteria population was greatest,actinomycete was followed,and fungi was the least one. As the deeper of the soil profile,the soil microorganisms population was decreased rapidly that mainly result from rapidly decreasing of bacteria population. Soil microbial population in RDL was greater compared with that of SGSML with fewer roots due to effect of different crop roots distribution. (2) Population of bacteria and actinomycete in crop growth period was greater than that of the fallow season,while the fungi population in crop growth period was lower than that of the fallow season. (3) Bacteria and fungi population reached the maximum number when the gravel mulched with 6 a to 12 a. Bacteria and fungi population was decreased as increasing of gravel mulched years due to gradually aging of GSMF. The actinomycete population was the other way round. (4) Good correlation was found between soil microbial population of GSMF and soil water content, pH,gravel mulched years. Soil total C content was one of the important factors restricting the soil microbial developing.
中文关键词	干旱半干旱地区 ; 砂田 ; 不同覆盖年限 ; 土壤微生物 ; 环境因子
英文关键词	arid and semi-arid area gravel and sand mulched field (GSMF) different mulched year soil microbe environment factors
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Agriculture
WOS研究方向	Agriculture
CSCD记录号	CSCD:6043151
来源机构	中国科学院西北生态环境资源研究院 ; 甘肃农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/235899
作者单位	逄蕾, 中国科学院寒区旱区环境与工程研究所, 甘肃省干旱生境作物学重点实验室, 兰州, 甘肃 730070, 中国.; 路建龙, 甘肃农业大学, 甘肃省干旱生境作物学重点实验室, 兰州, 甘肃 730000, 中国.; 樊志龙, 甘肃农业大学, 甘肃省干旱生境作物学重点实验室, 兰州, 甘肃 730000, 中国.; 周茅先, 兰州财经大学, 兰州, 甘肃 730101, 中国.; 肖洪浪, 中国科学院寒区旱区环境与工程研究所, 兰州, 甘肃 730070, 中国.; 柴守玺, 甘肃农业大学, 兰州, 甘肃 730000, 中国.
推荐引用方式 GB/T 7714	逄蕾,路建龙,周茅先,等. 砂龄对砂田土壤微生物区系及理化性状的影响[J]. 中国科学院西北生态环境资源研究院, 甘肃农业大学,2017,35(4):185-192.
APA	逄蕾,路建龙,周茅先,肖洪浪,樊志龙,&柴守玺.(2017).砂龄对砂田土壤微生物区系及理化性状的影响.干旱地区农业研究,35(4),185-192.
MLA	逄蕾,et al."砂龄对砂田土壤微生物区系及理化性状的影响".干旱地区农业研究 35.4(2017):185-192.