毛乌素沙地土壤盐渍化程度对樟子松造林效果的影响  

Effects of Soil Salinity Degree on Pinus sylvestris var. mongolica Afforestation in Mu Us Sandy Land

作　　者：李根前[1] 王俊波 漆喜林 高海银 陈文宏 刘春红 李小婷[1] 曹子林[1] 

机构地区：[1]西南林业大学,云南昆明650224 [2]陕西省防护林建设工作站,陕西西安710082 [3]定边县林业站,陕西定边718600

出　　处：《西部林业科学》2014年第1期6-9,共4页Journal of West China Forestry Science

基　　金：陕西荒漠化地区针叶树造林关键技术研究集成与示范推广

摘　　要：在毛乌素沙地土壤盐渍化治理过程中,开展了樟子松栽培试验,分析了盐渍化程度对造林效果的影响。结果表明,随着盐渍化程度的加重,土壤水溶性盐总量、pH值以及阴离子CO32-、HCO3-、Cl-和交换性Mg2+、K+、Na+的质量分数随之升高,差异达到显著或极显著水平;轻度、中度和重度盐渍化地段的土壤含水率分别为9.38%、8.65%和5.92%,差异显著;造林保存率、林木生长量、树冠覆盖率和生产力随盐渍化程度的加重而下降,重度与轻度和中度之差存在差异显著和极显著水平。当土壤盐渍化达到重度时,樟子松的存活、生长受到明显抑制。During the process of soil salinization control in Mu Us sandy land , a cultivation experiment on Pinus sylvestris var.mongolica was carried out to analyze the effect of salinization degree on afforestation .The results showed that： with the aggravating salinization degree , total amount of water-soluble salt , pH value , anionic CO3 2-, HCO3 -, Cl -and exchangeable Mg 2＋, K＋, Na ＋contents all increased , the difference was extremely significant .The moisture content of mild , moderate and severe salinization land was 9.38%、 8.65%and 5.92%respectively, the difference was significant .At the same time the survival rate of afforestation , forest growth, canopy cover rate and productivity decreased , the differences between severe and mild , moderate degree were sig-nificant and extremely significant .When it came to severe salinization degree , the survival and growth of Pinus sylvestris var.mongolica were significantly inhibited .

关 键 词：盐渍化 保存率 生长量 生物量 樟子松 毛乌素沙地 

分 类 号：S156[农业科学—土壤学]