干旱区生态环境知识资源中心(Arid): 柴达木盆地弃耕地成因及其土壤盐渍地球化学特征

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	柴达木盆地弃耕地成因及其土壤盐渍地球化学特征
其他题名	FORMING FACTORS AND SALINE-GEOCHEMICAL FEATURES OF DESERTED FARMLAND IN QAIDAM BASIN
	王启基 1; 王文颖 2; 王发刚 3; 李晓明 4; 李惠青 4
来源期刊	土壤学报
ISSN	0564-3929
出版年	2004
卷号	41 期号:1 页码:44-49
中文摘要	柴达木盆地弃耕地土壤pH值一般都在8左右,属于碱性土壤.土壤含盐量较高,其全盐量随着土层深度的增大而减少.0～10 cm土层中的含盐量最大,一般在1～45 g kg-1之间.弃耕地土壤阳离子主要以K+、Na+、Mg2+、Ca2+为主,各阴离子在三层土体中的含量为Cl-＞SO2-4＞HCO-3＞CO2-3.经相关分析表明,弃耕地土壤全盐量与Cl-呈极显著的正相关(p＜0.01),其次为Mg2+和Ca2+(p＜0.05),而与HCO-3呈负相关;Cl- 与Mg2+和Ca2+ 呈极显著的正相关(p＜0.01),与CO2-3和SO2-4呈弱的正相关,而与HCO-3呈负相关;从而进一步说明,柴达木盆地弃耕地土壤为氯化物盐化土.柴达木盆地弃耕地土壤中有机质含量较少,0～30 cm土层中有机质平均含量为11.46 g kg-1;全氮、全磷的含量极低,全钾的含量较为丰富.示范试验结果分析认为,柴达木盆地荒漠绿洲土地退化及土壤盐碱化的发生与当地自然条件和人为不合理利用等因素有紧密的联系.
英文摘要	Deserted farmlands in the Qaidam Basin are mostly of alkali soil with pH value around 8, high in salt content. Salts concentrate mostly in the 0～10 cm surface layer, ranging within 1～45 g kg~(-1), and decrease in content with depth of the profile. Cations in the soil are dominated with K~+ , Na~+ , Mg~(2+) and Ca~(2+), whereas anions are in a decreasing order of Cl~1 > SO_4~(2-)> HCO_3~- > CO_3~- in terms of content in the 0～10 cm, 10～20 cm and 20～30 cm soil layers. The correlation between to-tal salt and Cl" content is positive and extremely significant (p < 0.01) , and that between total salt and Mg~(2+) , Ca~(2+) content significantly positive, too (p < 0.05) , but that between total salt and HC0_3~- content negative, whereas, the correlation between Cl~- and Mg~(2+) , Ca~(2+) content is positive and extremely significant (p < 0.01), and that between CO2" and SO2." content also significantly positive, but that between Cl~- and HC0_3~- content negative. All these findings further suggest that the soils are heavy chloride saline soils. Organic matter contents of the soils are low averaging 11.46 g kg~(-1) in the 0～30 cm soil layer. The content of total N and P of the soils are also very low, but the soils are rich in K. The results obtained from experimental area indicate that degradation and salinization of the soils is closely related to the lo-cal natural conditions and irrational human activities in the region.
中文关键词	柴达木盆地 ; 弃耕地 ; 成因盐渍地球化学特征
英文关键词	Qaidam Basin Deserted farmland Cause of formation Saline-geochemical features
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:1499017
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/205548
作者单位	1.中国科学院西北高原生物研究所, 西宁, 青海 810001, 中国; 2.青海师范大学, 西宁, 青海 810008, 中国; 3.青海畜牧兽医职业学院, 湟源, 青海 810600, 中国; 4.海西州草原站, 德令哈, 青海 817000, 中国
推荐引用方式 GB/T 7714	王启基,王文颖,王发刚,等. 柴达木盆地弃耕地成因及其土壤盐渍地球化学特征[J]. 中国科学院西北生态环境资源研究院,2004,41(1):44-49.
APA	王启基,王文颖,王发刚,李晓明,&李惠青.(2004).柴达木盆地弃耕地成因及其土壤盐渍地球化学特征.土壤学报,41(1),44-49.
MLA	王启基,et al."柴达木盆地弃耕地成因及其土壤盐渍地球化学特征".土壤学报 41.1(2004):44-49.