干旱区生态环境知识资源中心(Arid): Effect of different grazing intensities on bacterial community composition and diversity in rhizosphere and non-rhizosphere soils in desert steppe of China

Arid

DOI	10.4067/S0718-58392019000400531
	Effect of different grazing intensities on bacterial community composition and diversity in rhizosphere and non-rhizosphere soils in desert steppe of China
	Zhang, Guogang 1; Huang, Jing 1; Jia, Meiqing 2; Huang, Wei 1; Sui, Xin 1; Wang, Zhongwu 3,4; Han, Guodong3,4
通讯作者	Jia, Meiqing
来源期刊	CHILEAN JOURNAL OF AGRICULTURAL RESEARCH
ISSN	0718-5839
出版年	2019
卷号	79 期号:4 页码:531-546
英文摘要	Degradation and desertification are extremely significant environmental problems in arid and semi-arid grassland ecosystems. Long-term overgrazing is the most fundamental cause of grassland degradation. We investigated relationships between grazing intensity and bacterial communities in non-rhizospheric and rhizospheric soils in desert steppe, including 0-10, 10-20 and 20-30 cm depth soils, as well as Stipa breviflora Griseb., Cleistogenes songorica (Roshev.) Ohwi, Artemisia frigida Willd. and plant community rhizospheric soils. This involved simulating grazing intensities in a long-term localization experiment, using a randomized block design. The effects of grazing on non-rhizospheric soil bacterial abundance were reflected in the 0-10 cm layer, increasing under light grazing and decreasing rapidly under moderate and heavy grazing, mainly related to Bacillus. Bacterial abundance in dominant plant rhizosphere responded differently. In A. frigida Willd. Rhizosphere, it decreased with increasing grazing intensity (a trend repeated in mixed rhizosphere). Bacterial abundance in S. breviflora and C. songorica rhizosphere increased under light and decreased under moderate and heavy grazing. Thus, changes in the dominant plant rhizospheric bacterial community did not significantly affect bacterial abundance in mixed rhizosphere. Changes in the rhizospheric bacterial abundance mainly resulted from levels of the dominant species, Streptomyces and Arthrobacter. There were significantly different results for bacterial community structure. Specifically, grazing had a nonsignificant and significant impact on bacterial community structures in non-rhizospheric (F-PERMANOVA = 1.38, p = 0.199) and rhizospheric (F-PERMANOVA = 2.03, p = 0.012) soil, respectively, varying significantly among plants (F-PERMANOVA = 1.9, p = 0.022). In conclusion, bacterial communities in rhizosphere were mainly affected by plant species and were more sensitive to changing grazing intensity than in non-rhizospheric soil.
英文关键词	Desert steppe grazing intensity non-rhizosphere rhizosphere soil bacteria
类型	Article
语种	英语
国家	Peoples R China
开放获取类型	gold, Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000492756200004
WOS关键词	MICROBIAL COMMUNITIES ; STIPA-BREVIFLORA ; INNER-MONGOLIA ; CARBON ; PLANT ; IMPACT
WOS类目	Agriculture, Multidisciplinary ; Agronomy
WOS研究方向	Agriculture
EI主题词	2019-10-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310053
作者单位	1.Tianjin Normal Univ, Coll Life Sci, Tianjin 300387, Peoples R China; 2.Tianjin Normal Univ, Key Lab Water Resource & Environm, Tianjin 300387, Peoples R China; 3.Inner Mongolia Agr Univ, Coll Grassland Resources & Environm, Hohhot 010019, Inner Mongolian, Peoples R China; 4.Inner Mongolia Agr Univ, Minist Grassland Resources Educ, Key Lab, Hohhot 010019, Inner Mongolian, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Guogang,Huang, Jing,Jia, Meiqing,et al. Effect of different grazing intensities on bacterial community composition and diversity in rhizosphere and non-rhizosphere soils in desert steppe of China[J],2019,79(4):531-546.
APA	Zhang, Guogang.,Huang, Jing.,Jia, Meiqing.,Huang, Wei.,Sui, Xin.,...&Han, Guodong.(2019).Effect of different grazing intensities on bacterial community composition and diversity in rhizosphere and non-rhizosphere soils in desert steppe of China.CHILEAN JOURNAL OF AGRICULTURAL RESEARCH,79(4),531-546.
MLA	Zhang, Guogang,et al."Effect of different grazing intensities on bacterial community composition and diversity in rhizosphere and non-rhizosphere soils in desert steppe of China".CHILEAN JOURNAL OF AGRICULTURAL RESEARCH 79.4(2019):531-546.