干旱区生态环境知识资源中心(Arid): 不同封育年限对宁夏荒漠草原土壤粒径及碳氮储量的影响

Arid

	不同封育年限对宁夏荒漠草原土壤粒径及碳氮储量的影响
其他题名	Time course of changes in soil particle size and carbon and nitrogen reserves after fencing Ningxia desert steppe
	谢莉; 宋乃平; 孟晨; 吴婷; 陈晓莹; 李敏岚; 岳健敏
来源期刊	草业学报
ISSN	1004-5759
出版年	2020
卷号	29 期号:2 页码:1-10
中文摘要	封育禁牧的时间效应已经成为科学和政府决策关注的焦点,研究以宁夏盐池县典型荒漠草原围封6、10、15年样地的围栏内外2种主要土壤类型灰钙土和风沙土为研究对象,基于样线调查法及方差分析法,探究不同封育年限对荒漠草原颗粒组成及土壤碳氮储量的影响。结果表明:1)封育会导致灰钙土及风沙土土壤细颗粒含量增加,灰钙土封育6年样地土壤细颗粒较围栏外增加量最明显,后随封育年限的增加而呈现增幅减少的趋势;风沙土封育15年样地围栏内土壤细颗粒增加量高于封育6年样地。2)灰钙土及风沙土封育6年样地均表现为围栏内土壤碳氮(有机碳、全碳、全氮)含量高于围栏外,而围封10年及15年样地围栏内外土壤碳氮含量没有明显差异。 3)灰钙土围封6年样地围栏内土壤碳氮比高于围栏外,而围封10年及15年样地无此规律,围封不会影响风沙土土壤碳氮比。围封可以有效使土壤颗粒细化,但不同土质对封育年限的响应有所差异,人工封育的最佳时间尺度应根据草原退化程度和草原不同土壤条件而定。
英文摘要	The time course of soil and vegetation changes after fencing for grazing prohibition has become a research focus of the science community and research results are used by the Chinese government for decisionmaking in land use planning.This study investigated the effects of fencing and grazing exclusion for 6,10,15 years on soil ped size distribution and on soil carbon and nitrogen storage in sierozem and aeolian sandy soil types of typical desert grassland in Yanchi County,Ningxia Autonomous Region.It was found that:1)Fencing increased the content of fine peds in both sierozem and aeolian soil types.In the sierozem soil,structure change characterized by an increase in fine peds was most obvious after 6 years and then decreased with increasing time fenced.By contrast,in the aeolian soil the incidence of fine peds was greater at the site fenced for 15 year than at the site fenced for 6 years.2)The contents of carbon and nitrogen(organic carbon,total carbon and total nitrogen)in soils at sites fenced for 6 years was higher inside than outside the fencing encloures,but there were no significant differences between the inside and outside of the fencing enclosures,in carbon and nitrogen contents of soils at sites fenced for 10 and 15 years.3)The carbon to nitrogen(C∶N)ratio in sierozem soils fenced for 6 years was higher than that outside of the fence,but there was no such effect seen at sites fenced for 10 years and 15 years.The fence did not affect the(C∶N)ratio in the aeolian sandy soil.In summary, fencing can influence soil structure and ped size distribution.but the response trajectory over time differs between soil types.The optimal fencing duration to promote grassland recovery should be determined according to the degree of degradation and soil conditions at each site.
中文关键词	封育年限 ; 荒漠草原 ; 典型土壤 ; 粒径组成 ; 碳氮储量
英文关键词	closing period desert grassland typical soil soil particle carbon and nitrogen storage
语种	中文
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6652999
来源机构	宁夏大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315766
作者单位	宁夏大学;;西北退化生态系统恢复与重建教育部重点实验室, 西北土地退化与生态系统恢复国家重点实验室培养基地;;西北退化生态系统恢复与重建教育部重点实验室, 银川;;银川, 宁夏;;宁夏 750021;;750021, 中国
推荐引用方式 GB/T 7714	谢莉,宋乃平,孟晨,等. 不同封育年限对宁夏荒漠草原土壤粒径及碳氮储量的影响[J]. 宁夏大学,2020,29(2):1-10.
APA	谢莉.,宋乃平.,孟晨.,吴婷.,陈晓莹.,...&岳健敏.(2020).不同封育年限对宁夏荒漠草原土壤粒径及碳氮储量的影响.草业学报,29(2),1-10.
MLA	谢莉,et al."不同封育年限对宁夏荒漠草原土壤粒径及碳氮储量的影响".草业学报 29.2(2020):1-10.