| 沙漠与沙漠化 |
|
|
|
|
| Dynamics of Soil Salt Accumulation in Oasis at Lower Reaches of an Inland River Basin |
| WANG Yu-gang1, XIAO Du-ning2, LI Yan1 |
| 1.Fukang Station of Desert Ecology and Key Laboratory of Oasis Ecology and Desert Environment, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; 2.Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China |
|
|
|
|
Abstract The dynamics of soil salt content in topsoil (0~20 cm) and its major causes were studied in Fubei region on the oasis at the lower reach of the Sangong river watershed with a combination of methods in geostatistics, GIS, and RS. The results revealed that: ①Transitions between landscape types were frequent. Both the processes of oasis development and desertification were being intensified, and the former was faster than the later. ②The spatial variation in soil salinity was best fitted by exponential model in 1982 and 2005, with F-test showing high level of confidence. ③Mapping of soil salinity by Kriging and its comparison with landscape maps at the same period showed that the area of soil salinization was increased, and the degree of soil salinization was higher in 2005 than in 1982. The area of soil salt content being more than 20 g·kg-1 had increased by 15.36%, but the area of soil salt content within 5~10 g·kg-1 had decreased by 43.85% in 2005 than that in 1982; ④Agricultural irrigation with water from reservoir was the major cause directly resulted in the rise of groundwater table, and then indirectly lead to soil salinization.
|
|
Received: 21 March 2008
Published: 20 July 2009
|
|
|
[1]Masoud A A,Koike K.Arid land salinization detected by remotely-sensed landcover changes:A case study in the Siwa region,NW Egypt[J].Journal of Arid Environments,2006,66:151-167.
[2]姚德良,朱进生,谢正桐,等.土壤水盐运动模式研究及其在干旱区农田的应用[J].中国沙漠,2001,21(3):286-290.
[3]O’Hara S L.Irrigation and land degradation:implications for agriculture in Turkmenistan,central Asia [J].Journal of Arid Environments,1997,37:165-179.
[4]Jordán M M,Navarro-Pedreo J,García-Sánchez E,et al.Spatial dynamics of soil salinity under arid and semi-arid conditions:geological and environmental implications[J].Environmental Geology,2003,45(4):448-456.
[5]温小虎,仵彦卿,苏建平,等.额济纳盆地地下水盐化特征及机理分析[J].中国沙漠,2006,26(5):836-841.
[6]王玉刚,肖笃宁,李彦.流域尺度绿洲盐分的空间异质性[J].生态学报,2007,27(12):5262-5270.
[7]康尔泗,李新,张济世.甘肃河西地区内陆河流域荒漠化的水资源问题[J].冰川冻土,2004,26(6):657-667.
[8]潘晓玲.干旱区绿洲生态系统动态稳定性的初步研究[J].第四纪研究,2001,21(4):345-350.
[9]王政权.地统计学及其在生态学中的应用[M].北京:科学出版社,1999:26-98.
[10]Zhang Ch Sh,McGrath D.Geostatistical and GIS analyses on soil organic carbon concentrations in grassland of southeastern Ireland from two different periods [J].Geoderma,2004,119:261-275.
[11]Douaik A,Meirvenne M V,Tóth D.Soil salinity mapping using spatio-temporal kriging and Bayesian maximum entropy with interval soft data[J].Geoderma,2005,128:234-248.
[12]马风云,李新荣,张景光,等.沙坡头固沙植被若干物理因子的空间异质性研究[J].中国沙漠,2005,25(2):207-215.
[13]Chang Y H,Scrimshaw M D,Emmerson R H C,et al.Geostatistical analysis of sampling uncertainty at the Tollesbury Managed Retreat site in Black water Estuary Essex,UK:Kriging and cokriging approach to minimize sampling density[J].The Science of the Total Environment,1998,221:43-57.
[14]张淑娟,何勇,方慧.基于GPS和GIS的田间土壤特性空间变异性的研究[J].农业工程学报,2003,19(2):39-45.
[15]樊自立,马英杰,艾力西尔·库尔班,等.试论中国荒漠区人工绿洲生态系统的形成演变和可持续发展[J].中国沙漠,2004,24(1):10-16.
[16]樊自立,马映军.干旱区水资源开发及合理利用的几个问题[J].干旱区研究,2000,17(3):6-11.
[17]王涛.干旱区绿洲化、荒漠化研究的进展与趋势[J].中国沙漠,2009,29(1):1-9. |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
2009, Vol. 29 
