干旱区生态环境知识资源中心(Arid): 石羊河流域中下游沙漠一河岸过渡带土壤特征研究

Arid

	石羊河流域中下游沙漠一河岸过渡带土壤特征研究
其他题名	Study on Soil Characteristics of Desert-riverside Ecotone in Middle and Lower Reaches of Shiyang River
	李银科; 刘世增; 刘虎俊; 魏怀东; 杨自辉; 张莹花; 刘淑娟
来源期刊	水土保持研究
ISSN	1005-3409
出版年	2012
卷号	19 期号:6 页码:29-35
中文摘要	对石羊河中游断流段(DS)、泉水溢出段(SOS)及下游水库以上丰水段(WSA)和水库以下干涸段(DSB)沙漠一河岸过渡带0200 cm土层土壤理化性质进行了调查和分析。结果表明:土壤含水量的大小顺序为WSA>SOS>DSB>DS。雨季降水对WSA段土壤含水量的影响很小,对其他河段土壤含水量影响较大,其对土壤水分的贡献主要在1040 cm土层;土壤容重大,且表层大于下层。pH值7.70~8.55,表层低于下层。pH值从上游至下游依次减小,其变化与有机质含量和盐分组成及总量有关;土壤养分贫瘠,有机质、全氮、速效磷含量低,速效钾含量高。WSA段土壤有机质和全氮含量最大,DS段土壤速效磷和速效钾含量最大;土壤含盐量从上游至下游依次增大。WSA和DSB段土壤已盐化,盐化类型分别为氯化物一硫酸盐盐化土和硫酸盐一氯化物盐化土。由于同时受水力和风力的影响,石羊河中下游沙漠一河岸过渡带土壤性质变异大,各河段之间的差异大多都不显著。
英文摘要	Physical and chemical properties of soil in 0200 cm layer in the desert-riverside ecotone were examined at dryer section (DS), springs overflow section (SOS) in middle reaches of Shiyang river, and wet section above Hongyashan reservoir (WSA) and drying section in Hongyashan reservoir below (DSB) in lower reaches of Shiyang river. The results showed that the order of the soil water contents was WSA>SOS>DSB>DS. Precipitation in rainy season has little effect on WSA, whereas relatively big effect on the others, and its contribution to soil moisture mainly focused in 1040 cm soil layer; the bulk density of soil was high, and the value of soil surface was higher than that in sublayer. The soil pH value was 7.70~8.55, and the value in soil surface was lower than that in sublayer. Soil pH value decreased in turn from upper to lower reaches, the changes were related with organic matter content, salt composition and total salt content; the soil nutrient was insufficient with the low content of organic matter, total nitrogen and available phosphorus, and with high content of available potassium. Soil organic matter and total nitrogen were the highest at WSA, and available phosphorus was the highest at DS; soil salt content increased in turn from upper to lower reaches. The soil salinization has happened at WSA and DSB, the salinization types were chloride-sulfate and sulfate-chloride, respectively. The soil properties were of great variability because of hydraulic force and wind, the difference of soil properties between each river section was mostly insignificant.
中文关键词	石羊河中下游 ; 沙漠一河岸过渡带 ; 土壤理化性质
英文关键词	middle and lower reaches of Shiyang River desert-riverside ecotone soil physical and chemical properties
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:4722461
来源机构	甘肃省治沙研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/228642
作者单位	甘肃省治沙研究所, 甘肃省荒漠化与风沙灾害防治重点实验室;;甘肃省省部共建国家重点实验室培育基地, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	李银科,刘世增,刘虎俊,等. 石羊河流域中下游沙漠一河岸过渡带土壤特征研究[J]. 甘肃省治沙研究所,2012,19(6):29-35.
APA	李银科.,刘世增.,刘虎俊.,魏怀东.,杨自辉.,...&刘淑娟.(2012).石羊河流域中下游沙漠一河岸过渡带土壤特征研究.水土保持研究,19(6),29-35.
MLA	李银科,et al."石羊河流域中下游沙漠一河岸过渡带土壤特征研究".水土保持研究 19.6(2012):29-35.