| Biology and Soil |
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| Irrigation-induced Spatio-temporal Variability of Soil Water and Salinity in Qitai Oasis, Xinjiang of China |
| LI Bao-fu1,2, XIONG Hei-gang3, LONG Tao4, ZHANG Jian-bing5, ZHANG Fang4 |
1.State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China;
2.Graduate University of Chinese Academy of Sciences, Beijing 100049, China;
3.College of Arts and Science of Beijing Union University, Beijing 100083, China;
4.College of Resource and Environment Science, Xinjiang University, Urumqi 830046, China;
5.Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China |
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Abstract The paper studied the spatial and temporal variability of soil water content and soil salinity content in farmland before and after irrigation in Qitai County, Xinjiang, China. Before irrigation, the soil water content at each soil layer was low (18.43%~20.30%) with moderate and weak variability. One week after irrigation, the spatial pattern of soil water content turned to be weak variability except for 40-60 cm and 100-120 cm soil layers; the average soil water content at the whole soil layer increased by 6.90% with an average desalination rate of 11.37%; the soil water content increasing rate (50.93%) and the desalination rate (27.14%) at the surface soil (0-20 cm) were the maximum, and the soil water content increasing rate (26.59%) and desalination rate (-4.76%) at the soil bottom layer (100-120 cm) were the minimum. Three weeks after irrigation, the average soil water content at the whole soil layer reduced by 3.64%, and the soil water loss rate (28.84%) at the soil surface layer (0-20 cm) was the maximum; the average desalination rate at the whole soil layer was 9.63%, and the average desalination rate at 0-60 cm soil layer (7.58%) decreased while the desalination rate at 60-120 cm soil layer (11.01%) increased. Apart from the 20-40 cm soil layer, the variability of soil water content distribution was consistent with that before irrigation, showing the similar soil water content. The variability of soil salinity content distribution at each soil layer, the average soil salinity (medium variance) and soil water content (weak variance) at the whole soil layer remained unchanged in three weeks after irrigation, while their variation coefficient decreased. The spatial autocorrelation of average soil water content at the whole soil layer transferred from moderate to strong, and its variable range was increasing; the average soil salinity content at the whole soil layer presented a strong spatial autocorrelation with the variable range increasing first and then decreasing.
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Received: 21 February 2012
Published: 20 September 2012
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| [1]张永波,王秀兰.表层盐化土壤区咸水灌溉试验研究[J].土壤学报,1997,34(1):53-58.[2]冯广平,姜卉芳,董新光,等.干旱内陆河灌区地面灌溉条件下土壤水盐运动规律研究[J].灌溉排水学报,2006,25(3):82-84.[3]孙海燕,王全九,彭立新,等.滴灌施钙时间对盐碱土水盐运移特征研究[J].农业工程学报,2008,24(3):53-58.[4]吴忠东,王全九.不同微咸水组合灌溉对土壤水盐分布和冬小麦产量影响的田间试验研究[J].农业工程学报,2007,23(11):71-76.[5]陈冰,蒋平安.不同灌水量对碱化土的影响[J].干旱区地理,2005,28(1):103-106.[6]王玉刚,肖笃,李彦.三工河流域中上游绿洲土壤盐化的时空动态[J].中国沙漠,2008,28(3):478-484.[7]王玉刚,肖笃,李彦.干旱内流区尾闾绿洲土壤积盐的动态特征[J].中国沙漠,2009,29(4):604-610.[8]赵哈林,赵学勇,张铜会,等.我国西北干旱区的荒漠化过程及其空间分异规律[J].中国沙漠,2011,31(1):1-8.[9]Hillel D.Research in soil physics:A review[J].Soil Science,1991,151:30-34.[10]姚荣江,杨劲松,刘光明.土壤盐分和含水量的空间变异性及其CoKriging估值——以黄河三角洲地区典型地块为例[J].水土保持学报,2006,20(5):133-138.[11]杨红梅,徐海量,樊自立,等.塔里木河下游表层土壤盐分空间变异和格局分析[J].中国沙漠,2010,30(3):564-570.[12]张勃,孟宝,郝建秀,等.干旱区绿洲-荒漠带土壤水盐异质性及生态环境效应研究——以黑河中游张掖绿洲为例[J].中国沙漠,2006,26(1):81-84.[13]杨劲松,姚荣江.黄河三角洲地区土壤水盐空间变异特征研究[J].地理科学,2007,27(3):348-353.[14]徐英,陈亚新,史海滨,等.土壤水盐空间变异尺度效应的研究[J].农业工程学报,2004,20(2):1-5.[15]杨玉海,陈亚宁,李卫红,等.准噶尔盆地西北缘新垦绿洲土地利用对土壤养分变化的影响[J].中国沙漠,2008,28(1):94-100.[16]唐启义,冯明光.DPS数据处理系统[M].北京:科学出版社,2007:951-953. [17]Brooker P I.Irrigation equipment selection to match spatial variability of soils[J].Mathematical and Computer Modelling,2001,33(6):619-623.[18]Ju nior V V,Carvalho M P,Dafonte J,et al.Spatial variability of soil water content and nlechanical resistance of Brazilian ferralsol[J].Soil & Tillage Research,2006,85(1):166-177.[19]Ferrero A,Usowicz B,Lipiec J.Effects of tractor traffic OU spatial variability of soil strength and water content in grass covered and cultivated sloping vineyard[J].Soil ＆Tillage Research,2005,84(2):127-138.[20]胡克林,李保国,林启美,等.农田土壤养分的空间变异性特征[J].农业工程学报,1999,15(3):33-38.[21]黄冠华,沈荣开.大尺度非饱和土壤水分运动的随机模型及有效参数的结构分析[J].水利学报,1997(11):39-47.[22]Askin T,Klzllkaya R.Assessing spatial variability of soil enzyme activities in pasture topsoils using geostatistics[J].European Journal of Soil Biology,2006,42(4):230-237.[23]雷志栋,杨诗秀,谢森传.土壤动力学[M].北京:清华大学出版社,1998:20-26.[24]李禄军,蒋志荣,车克钧,等.绿洲-荒漠交错带不同沙丘土壤水分时空动态变化规律[J].水土保持学报,2007,21(1):123-127. |
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2012, Vol. 32 
