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不同生境下盐生灌木盐岛效应的变化及生态学意义
引用本文:尹传华,董积忠,石秋梅,张科,赵振勇,田长彦.不同生境下盐生灌木盐岛效应的变化及生态学意义[J].土壤学报,2012,49(2):289-295.
作者姓名:尹传华  董积忠  石秋梅  张科  赵振勇  田长彦
作者单位:1. 荒漠与绿洲生态国家重点实验室,乌鲁木齐830011;中国科学院新疆生态与地理研究所,乌鲁木齐830011
2. 喀什地区农业技术推广中心,新疆喀什,844000
3. 新疆大学生命科学与技术学院,乌鲁木齐,830046
基金项目:国家自然科学基金项目(40701081);中国科学院西部之光博士专项(XBBS200802)资助
摘    要:为探明生境与植物种类对盐岛效应的影响,选取了分布于塔里木盆地北缘盐化草甸生境和灌丛生境的3种盐生灌木,即多枝柽柳(Tamarix ramosissima)、盐穗木(Halostachys caspica)、盐节木(Halocnemumstrobilaceum),分析了植丛下与植丛间土壤的pH、总盐和8种盐分离子含量的变化。研究结果表明在盐化草甸生境,只有盐节木植丛下的土壤盐分呈明显的富集状态,即形成了盐岛;而在灌丛生境,3种盐生植物均具有明显的盐岛效应,且盐岛效应以盐节木最高,多枝柽柳最低。数据分析进一步表明盐岛效应的强弱受植物种类和所处生境的影响:即分布于高盐环境的盐生植物和耐盐能力强的植物盐岛效应更为明显。而生境变化和植物种类的不同,对盐岛内盐分离子的富集也有不同的影响。盐岛效应的增强有加速草甸向盐生灌木为主的荒漠退化的趋势。

关 键 词:塔里木盆地  盐岛  多枝柽柳  盐穗木  盐节木
收稿时间:2010/11/8 0:00:00
修稿时间:2011/4/15 0:00:00

Salt island effect of halophytic shrubs in different habitats and its ecological implication
yinchuanhu,Dong Jizhong,Shi Qiumei,Zhang Ke,Zhao Zhenyong and Tian Changyan.Salt island effect of halophytic shrubs in different habitats and its ecological implication[J].Acta Pedologica Sinica,2012,49(2):289-295.
Authors:yinchuanhu  Dong Jizhong  Shi Qiumei  Zhang Ke  Zhao Zhenyong and Tian Changyan
Institution:Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences,Kashi Agricultural Technology Spread Center,College of Life Science, Xinjiang University,Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences,Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences,Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences
Abstract:Soil pH,total soil salt and eight main salt ions(K+,Na+,Ca2+,Mg2+,Cl-,SO2-4,CO2-3 and HCO-3) in soils under and in-between groves of Tamarix romasissima,Halostachys caspica,Halocnemum strobilaceum in two habitats,i.e.saline meadow and shrubland,were analyzed in order to explore effects of habitat and shrub species on salt island effect of halophytic shrubs in north Tarim Basin.Results show that in the saline meadow only under the grove of Halocnemum strobilaceum in the saline meadow,significant salt enrichment was observed in the soil,forming a salt island,while in the shrubland salt island effect was found in soils under all the three halophytic shrubs.That under Halocnemum strobilaceum was the most significant whereas under tamarisk the least.Data analysis further suggested that the salt island effect varied in strength with the halophytic shrub species and the habitat they grew in,that is to say,the salt island effect of halophytes and plants high in salt tolerance in salt-rich habitats is more obvious.And changes in habitat or plant species also influence to a varying extent enrichment of salt ions in the salt island.Intensified salt island effect accelerates degradation of saline meadow into halophyte-dominated desert in north Tarim Basin,Xinjiang.
Keywords:Tarim basin  salt island  Tamarix romasissima  Halostachys caspica  Halocnemum strobilaceum
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