干旱区生态环境知识资源中心(Arid): 荒漠草原土壤氮素和克氏针茅根系对不同放牧处理的响应

Arid

	荒漠草原土壤氮素和克氏针茅根系对不同放牧处理的响应
其他题名	Soil nitrogen and Stipa krylovii roots in desert steppe in response to different grazing treatments
	金净 1; 王占义 1; 朱国栋 1; 姚鸿云 1; 娜娜 1; 候伟峰 1; 于泽民 2; 王成杰 1
来源期刊	生态学杂志
ISSN	1000-4890
出版年	2017
卷号	36 期号:1 页码:72-79
中文摘要	通过设置不同放牧处理(羊单牧、牛单牧、牛羊混合放牧和不放牧),研究土壤氮素和优势种克氏针茅根系构型对不同放牧方式的响应。结果表明: 放牧14个月后(约2个生长季),牛单牧和牛羊混合放牧显著提高了10 ~20 cm土层土壤全氮含量,其中牛单牧提高了硝态氮含量,而牛羊混合放牧则以提高有机氮为主;不放牧区的克氏针茅地上生物量显著高于羊单牧、牛单牧和混合放牧区,而地下生物量差异不显著;在放牧处理14个月后,克氏针茅6项根系构型参数5项没有差异,但根系径级分级显示,不放牧区根系直径为2.5 ~3.5及4.0~4.5 mm的根系长度、体积和表面积显著高于其他放牧区。整体上看,放牧处理14个月,土壤和优势种植物的根系构型参数变化尚不明显,有待于继续观测。
英文摘要	An experiment was conducted to investigate the effects of grazing treatments (sheep or cattle grazing,mixed grazing of cattle and sheep,and no grazing) on root architecture of Stipa krylovii in the desert steppe of Inner Mongolia. After grazing for 14 months (two growing seasons), cattle grazing and mixed grazing of cattle and sheep significantly increased nitrogen content of soil at 10-20 cm depth. Cattle grazing improved nitrate content,while the mixed grazing of cattle and sheep mainly improved organic nitrogen content. The aboveground biomass in no grazing area was significantly greater than that in each grazing area,while belowground biomass was insignificantly different among the treatments. After grazing for 14 months,5 of 6 root architecture parameters of S. krylovii showed no differences among all the treatments. The classification of root diameter showed that root length,volume and surface area in diameter of 4.0-4.5 mm and 2.5-3.5 mm in no grazing area were significantly greater than those of the grazing areas. Overall, 14 months might be too short to change the soil and root architecture of the dominant plant,which deserves further observation.
中文关键词	荒漠草原 ; 混合放牧 ; 根系构型 ; 克氏针茅 ; 土壤氮 ; 生物量
英文关键词	desert steppe mixed grazing root architecture Stipa krylovii soil nitrogen biomass
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5897116
来源机构	内蒙古农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236548
作者单位	1.内蒙古农业大学草原与资源环境学院, 呼和浩特, 内蒙古 010018, 中国; 2.内蒙古自治区环境科学研究院, 呼和浩特, 内蒙古 010011, 中国
推荐引用方式 GB/T 7714	金净,王占义,朱国栋,等. 荒漠草原土壤氮素和克氏针茅根系对不同放牧处理的响应[J]. 内蒙古农业大学,2017,36(1):72-79.
APA	金净.,王占义.,朱国栋.,姚鸿云.,娜娜.,...&王成杰.(2017).荒漠草原土壤氮素和克氏针茅根系对不同放牧处理的响应.生态学杂志,36(1),72-79.
MLA	金净,et al."荒漠草原土壤氮素和克氏针茅根系对不同放牧处理的响应".生态学杂志 36.1(2017):72-79.