干旱区生态环境知识资源中心(Arid): 晋西北沙化土地土壤机械组成与有机质的初步研究

Arid

	晋西北沙化土地土壤机械组成与有机质的初步研究
其他题名	Study on Soil Mechanical Composition and Organic Matter of Desertification Land in Northwest of Shanxi Province
	苏志珠 1; 刘蓉 2; 梁爱民 3; 马义娟 2; 王国玲 4; 高君亮 5; 哈斯 6
来源期刊	水土保持研究
ISSN	1005-3409
出版年	2018
卷号	25 期号:6 页码:61-67
中文摘要	晋西北是我国北方旱作农田沙化土地较严重的地区之一,开展不同地类土壤的机械组成、有机质及其二者之间关系的研究,以期为该区沙化土地类型和程度评价及其防治效益评估提供科学依据。对研究区农田、人工林地(乔木)和荒地的表层(0-20cm)和下层(20-40cm)土样进行粒度和有机质分析,结果表明:不同地类土壤的机械组成均为粉粒(0.002~0.05mm)>极细砂(0.05~0.1mm)>细砂(0.1~0.25mm)>黏粒(<0.002mm),中砂及以上粒级(>0.5mm)含量极少,其中粉粒、极细砂和细砂为优势粒级组分,三者含量之和在90%以上。农田受翻耕影响,其表层和下层土壤机械组成差异不大;人工林地中林间表层受草本植被影响,其表层颗粒明显细于下层;荒地由于受冬春季风蚀影响,其表层则略粗于下层。不同地类土壤有机质的积累均表现出表层含量大于下层,总体上有机质含量表现为农田>荒地>人工林地。不同地类的土壤机械组成与有机质的关系,呈现出粉粒和黏粒与有机质含量呈正相关关系,而细砂和极细砂与有机质则呈负相关关系,在相关程度上,粉粒和细砂与有机质含量的正、负相关性最大,是研究区不同地类土壤有机质积累与否的关键粒级。
英文摘要	Northwest of Shanxi Province is one of the severe desertification areas in northern China.The samples of topsoils(0-20cm)and subsoils(20-40cm)collected from cropland,planted forest land and wasteland in the northwest of Shanxi Province,were analyzed for particle sizes and organic matter in the laboratory.The results showed that the contents of particle sizes decreased in order:silt(0.002~0.05mm)> very fine sand(0.05~0.1mm)>fine sand(0.1~0.25mm)>clay(<0.002mm)in the study area,and the content of>0.5mm particle size was very few.The contents of dominant size fractions which were silt,very fine sand and fine sand exceeded 90%.The soil mechanical composition was not significant difference between topsoil and subsoil in cropland due to plowing;the fractions of topsoil was finer than subsoil in the planted forestland because of the function of dispersing soil parent material of herbage which were grown in the topsoil under forest;and the soil in wasteland was less covered by vegetation layer in the winter and early spring when the wind erosion is the strongest in the year.The contents of organic matter from different land types in this area appeared greater in the topsoils than subsoils.The content of organic matter decreased in the order:cropland>wasteland>planted forest land.In terms of correlativity between soil mechanical composition and the content of organic matter,the fine particles(silt and clay)are positively correlated with the content of organic matter,while the coarse particles(fine sand and very fine sand)are negatively correlated with the content of organic matter.From the viewpoint of relevance degree,silt and fine sand are significantly positively and negatively correlated with the content of organic matter,respectively,which indicates that silt and fine sand are the key size fractions determining the organic matter accumulation.
中文关键词	沙化土地 ; 机械组成 ; 有机质 ; 晋西北
英文关键词	desertification land soil mechanical composition organic matter northwest of Shanxi Province
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:6341430
来源机构	北京师范大学 ; 中国林业科学研究院沙漠林业实验中心
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238367
作者单位	1.山西大学历史文化学院, 太原, 山西 030006, 中国; 2.太原师范学院地理科学学院, 晋中, 山西 030619, 中国; 3.中国科学院西北生态环境资源研究院, 兰州, 甘肃 730000, 中国; 4.山西大学环境与资源学院, 太原, 山西 030006, 中国; 5.中国林业科学研究院沙漠林业试验中心, 磴口, 内蒙古 015200, 中国; 6.北京师范大学资源学院, 北京 100875, 中国
推荐引用方式 GB/T 7714	苏志珠,刘蓉,梁爱民,等. 晋西北沙化土地土壤机械组成与有机质的初步研究[J]. 北京师范大学, 中国林业科学研究院沙漠林业实验中心,2018,25(6):61-67.
APA	苏志珠.,刘蓉.,梁爱民.,马义娟.,王国玲.,...&哈斯.(2018).晋西北沙化土地土壤机械组成与有机质的初步研究.水土保持研究,25(6),61-67.
MLA	苏志珠,et al."晋西北沙化土地土壤机械组成与有机质的初步研究".水土保持研究 25.6(2018):61-67.