干旱区生态环境知识资源中心(Arid): 川西北草地沙化对土壤颗粒组成和土壤磷钾养分的影响

Arid

	川西北草地沙化对土壤颗粒组成和土壤磷钾养分的影响
其他题名	Influences of grassland desertification on soil particles composition and soil phosphorus and potassium nutrients in northwestern Sichuan
	舒向阳; 胡玉福; 蒋双龙; 蒲琴; 袁铖铭; 彭佳佳
来源期刊	干旱区资源与环境
ISSN	1003-7578
出版年	2015
卷号	29 期号:8 页码:173-179
中文摘要	为揭示川西北若尔盖草原在草地沙化过程中土壤颗粒组成和矿质养分的变化特征,文中通过野外调查和室内分析化验,研究了川西北沙化过程中草地的土壤颗粒组成及磷、钾的变化特征。结果表明: 草地沙化过程中0 - 100cm土层土壤结构受到了严重破坏,呈现出明显的粗化特征,土壤砂粒含量显著增加,粉粒、粘粒、土壤速效磷和速效钾含量显著减少。其中,0 - 20cm土层变化最为明显,极重度沙化草地土壤完全沙化,沙粒含量高达95.83%,相对未沙化草地增加了28.15%,速效磷、速效钾含量非常缺乏,分别仅为3.64mg· kg~(- 1)、24.66mg·kg~(- 1), 相对于未沙化草地分别降低了52.79% 和74.29%。说明在沙化草地治理过程中,需及时补充适量的磷钾矿质养分。不同草地退化阶段研究表明,未沙化草地至中度沙化草地演变过程中,沙粒含量显著升高,粉粒、粘粒、速效磷、速效钾均有极显著降低,说明沙化草地的治理应将轻中度沙化阶段作为关键时期。
英文摘要	In order to reveal the variation characteristics of soil particle composition and mineral nutrient in grassland desertification process in Northwest Sichuan Ruoergai,the variation characteristics of soil particles composition,phosphorus and potassium in different degree desertification grassland were measured by combining investigation in field and analysis in laboratory. The result showed that grassland desertification in 0 - 100cm soil structure was severely damaged in the process,presented obvious characteristics of coarse,soil sand content increased significantly,silt,clay,soil available phosphorus and available potassium content decreased significantly. Among them,the 0 - 20cm layer changed mostly,the soil of severe sandy grassland completely desertified and sand content was up to 95.83%,increased by 28.15%; available phosphorus and available potassium was deficiency,only 3.64mg·kg~(- 1) and 24.66,mg·kg~(- 1),decreased by 52.79% and 74.29%,respectively. In the governance of desertificed grassland it was necessary to add the right amount of phosphorus,potassium and mineral nutrients. Different stages of grassland degradation studies showed that in the evolution from not desertified grassland to moderately desertified grassland,the sand content was significantly higher,silt,clay,available phosphorus and available potassium decreased significantly,explained that in sandy grassland of governance the mild stage of desertification should be taken as a critical period.
中文关键词	川西北 ; 沙化草地 ; 土壤颗粒 ; 土壤磷 ; 土壤钾
英文关键词	Northwest Sichuan desertification land soil particles composition soil phosphorus soil potassium
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:5473343
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/232802
作者单位	四川农业大学资源环境学院, 成都, 四川 611130, 中国
推荐引用方式 GB/T 7714	舒向阳,胡玉福,蒋双龙,等. 川西北草地沙化对土壤颗粒组成和土壤磷钾养分的影响[J],2015,29(8):173-179.
APA	舒向阳,胡玉福,蒋双龙,蒲琴,袁铖铭,&彭佳佳.(2015).川西北草地沙化对土壤颗粒组成和土壤磷钾养分的影响.干旱区资源与环境,29(8),173-179.
MLA	舒向阳,et al."川西北草地沙化对土壤颗粒组成和土壤磷钾养分的影响".干旱区资源与环境 29.8(2015):173-179.