干旱区生态环境知识资源中心(Arid): 咸水滴灌下塔里木沙漠公路防护林土壤盐分分布特征分析

Arid

	咸水滴灌下塔里木沙漠公路防护林土壤盐分分布特征分析
其他题名	Salt distribution characteristics of Taklimakan Desert highway shelterbelt under saline water drip-irrigation
	窦凯歌; 王永东; 雷加强; 赵英; 贾萌萌; 沈芳宇
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2015
卷号	38 期号:3 页码:576-584
中文摘要	对塔里木沙漠公路防护林地进行实地取样分析,研究咸水滴灌条件下土壤盐分变化规律及其离子分布特征。试验采用5个矿化度水平的咸水灌溉处理:29.70(1号井),25.90(2号井),20.99(8号井),16.95(14号井)和5.75g·L~(-1)(18号井)。试验结果表明:咸水滴灌对土壤盐分含量和离子组成有显著影响,土壤积盐程度随灌溉水矿化度的增大而加剧,土壤盐分组成以Cl~-、Na~+和SO_4~(2-)为主;不同盐分离子在土壤剖面上的分布特征不同,Cl~-、Na~+、Mg~(2+)和SO_4~(2-)四种离子的分布较一致,在垂直滴头向下方向浓度最低,远离滴头径向浓度逐渐增大,Ca~(2+)和HCO_3~-在剖面上的分布存在明显的不一致性,在水平方向上远离滴头HCO_3~-离子浓度向上层聚集,Ca~(2+)则表现为向下层淋溶。研究结果对极端干旱区高矿化度咸水的合理开发利用及防护林的可持续发展具有理论意义和应用价值。
英文摘要	The paper investigated the soil salinity and the distribution characteristics of different salt ions for the soils under drip irrigation with saline water in Taklimakan Desert highway shelterbelt,Xinjiang,China. The experiment included five treatments,in which controlled with the different mineralization degrees of irrigation water were:29.70(Well No.1),25.90(Well No.2),20.99(Well No.8),16.95(Well No.14)and 5.75 g·L~(-1)(Well No.18),respectively. The results showed that salt content and soil ion composition were significantly affected by saline water irrigation. Soil salinity increased with increasing irrigation water salinity levels. Depending on irrigation water chemistry,soil salinity composition was dominated by Cl~-,Na~+ and SO_4~(2-). The distribution characteristics of different salt ions in soil profiles were different. While Cl~-,Na~+,Mg~(2+) and SO_4~(2-) had relatively uniform distributions in soil profiles,i.e.,their concentration was the lowest in the vertically downward direction of emitters and was increased with the distance away from emittersradial direction,the distribution of Ca~(2 +) and HCO_3~- in soil profiles were significantly different. In the horizontal direction,with the distance away from emitters,HCO_3~- manifested as gathering to the upper layers,while Ca~(2+) showed up as leaching into the deeper soil layers. The results have a theoretical and applicable value for the reasonable development and utilization of the saline water as well as the sustainable development of the sheltering forest in extremely arid region.
中文关键词	咸水 ; 滴灌 ; 盐分离子 ; 塔里木沙漠公路防护林
英文关键词	drip irrigation saline water salt ions Taklimakan Desert highway shelterbelt
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:5446661
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/232658
作者单位	中国科学院新疆生态与地理研究所, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	窦凯歌,王永东,雷加强,等. 咸水滴灌下塔里木沙漠公路防护林土壤盐分分布特征分析[J]. 中国科学院新疆生态与地理研究所,2015,38(3):576-584.
APA	窦凯歌,王永东,雷加强,赵英,贾萌萌,&沈芳宇.(2015).咸水滴灌下塔里木沙漠公路防护林土壤盐分分布特征分析.干旱区地理,38(3),576-584.
MLA	窦凯歌,et al."咸水滴灌下塔里木沙漠公路防护林土壤盐分分布特征分析".干旱区地理 38.3(2015):576-584.