干旱区生态环境知识资源中心(Arid): 沙坡头固定沙丘结皮层的微生物区系动态

Arid

	沙坡头固定沙丘结皮层的微生物区系动态
其他题名	Microflora Dynamic in Microbiotic Crust Layer of Fixed Sand Dunes in Shapotou Region, Tengger Desert
	邵玉琴 1; 赵吉 1; 包青海 1; 刘新民 2; 雍世鹏 1; 廖仰南 1
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2002
卷号	22 期号:3 页码:298-303
中文摘要	对中科院沙坡头沙漠研究试验站的人工植被固定沙丘，红卫自然植被固定沙丘的结皮层和流动沙丘表层（0－0．5cm)中的微生物类群数量的研究结果表明：（1）好气性细菌数量影响着微生物总数量的变化趋势；（2）微生物总数量分布依次排列为：自然植被固定沙丘＞1956年栽植区＞1964年栽植区＞自然半固定沙丘＞1982年栽植区＞流动沙丘；（3）土壤微生物类群数量与结皮层的形成，植物覆盖度和土壤含水率等因子有密切的关系；（4）结皮层中的微生物类群数量与流动沙丘的固定程度呈正向关系。
英文摘要	Microflora in different soil crusts such as crust of sand dunes fixed by natural and artificial vege-tation and that of flowing sand, are various. Bacteria’s number is the most in all groups of microorganism, and the variation trend of the total microorganism’s number rest with the amount of aerophilic bacteria. Distribution order of microbial number in different soil crusts showed that fixed sand dune with natu-ral vegetation >sand dune with artificial vegetation of 1956>sand dune with artificial vegetation of 1964> semi-fixed sand dune with natural vegetation>sand dune with artificial vegetation of 1982>sand-flow-ing dune without vegetation. The amount of microorganisms in soil crust of fixed sand dunes with natural vegetation was most, it is 4. 46 times of sand dune with artificial vegetation in 1956, 7.44 times of sand dune with artificial vegetation in 1964, 18. 52 times of semi-fixed sand dune with natural vegetation, 43. 51 times of sand dune with artificial vegetation in 1982, and 90. 21 times of sand-flowing dune without vegeta-tion. Microbial number in soil crust was various with the years of sand fixed, the longer years of sand fixed, the more number of microorganism! the shorter years of sand fixed, the less number of microorgan-ism in sand dune. Microbial number of flowing sand dunes was the least in sand dunes.Number of microbial groups in crust of artificial vegetation type are various in different seasons. It is less in summer than in autumn, the ratios of amount between in summer and in autumn was 1:4. 91 in sand dune with artificial vegetation of 1956, 1:1.11 in sand dune with artificial plantation of 1964, 1: 7. 38 in sand dune with artificial vegetation of 1982, and 1:2. 9 in sand-flowing dune without vegetation. Soil microbial number is related to ecological factors such as formation of the crust, condition of vege-tation and water content of sand dunes, the longer ages of fixed sand dunes with artificial vegetation, the thicker layer of the crust, the more amount of soil microorganism, the more coverage with herbage, the less coverage with shrub.The number of soil microorganism in soil crusts are positive related to fixed degree of sand dunes.
中文关键词	沙坡头 ; 固定沙丘 ; 结皮层 ; 土地微生物区系 ; 人工植被 ; 荒漠化
英文关键词	shapotou region fixed sand dune microbiotic crust soil microflora
语种	中文
国家	中国
收录类别	CSCD
WOS类目	MICROBIOLOGY
WOS研究方向	Microbiology
CSCD记录号	CSCD:1075252
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/203659
作者单位	1.内蒙古大学生命科学学院自然资源研究所, 呼和浩特, 内蒙古 010021, 中国; 2.中科院寒区旱区环境与工程所, 沙城头沙漠试验研究站, 兰州, 甘肃 73000, 中国
推荐引用方式 GB/T 7714	邵玉琴,赵吉,包青海,等. 沙坡头固定沙丘结皮层的微生物区系动态[J]. 中国科学院西北生态环境资源研究院,2002,22(3):298-303.
APA	邵玉琴,赵吉,包青海,刘新民,雍世鹏,&廖仰南.(2002).沙坡头固定沙丘结皮层的微生物区系动态.中国沙漠,22(3),298-303.
MLA	邵玉琴,et al."沙坡头固定沙丘结皮层的微生物区系动态".中国沙漠 22.3(2002):298-303.