小蓬竹不同小生境土壤的理化性质  

Soil Physico-chemical Properties of Drepanostachyum luodianense in Different Microhabitats

作　　者：刘济明[1] 王敏[1] 张东凯[1] 廖小峰[1] 闫国华[1] 文萍[1] 赵晓鹏[1] 

机构地区：[1]贵州大学林学院,贵州贵阳550025

出　　处：《贵州农业科学》2012年第6期177-180,共4页Guizhou Agricultural Sciences

基　　金：贵州省国际科技合作计划"濒危植物小蓬竹生态适应性及育苗技术研究"[黔科合外G字(2009)700101];贵州大学引进人才科研项目"濒危植物小蓬竹个体生态特征及其小生境特点研究"

摘　　要：为了对小蓬竹的保护及其在石漠化治理中的应用提供理论基础,以小蓬竹群落为研究对象,采用常规样品采集和室内分析方法,对小蓬竹不同小生境土壤的理化性质进行了分析。结果表明:小蓬竹分布地的土壤酸碱性为弱碱性,质地为中壤土和重壤土,含水量坡下部各小生境高于坡上部,同一坡位以石缝小生境的含水量最高,其次为石沟、石槽、石洞、土面,坡下部各小生境的土壤养分均高于坡上部各小生境;坡上部各小生境的土壤有机质、水解性氮、速效钾含量均以石缝最高,有效磷以石槽最高;坡下部各小生境的土壤有机质、水解性氮、有效磷含量均以石槽最高,速效钾以石缝含量最高。To provide theoretical basis for the protection of D. luodianense and its application in the desertification control, the soil physic-chemical properties of different microhabitats of D. luodianense was studied thought routine sample collection and lab analysis. The results showed that the soil in the distribution area of D. luodianense was medium loam and heavy loam, the soil pH was of weak alkali. The soil moisture content at the foot slope was higher than at the upper slope in all kinds of microhabitats. At the same slope, the soil moisture content in stone crevice was the highest, the next were stone ditch, stone slot, stone cavern and soil surface. The nutrient level at the foot slope was higher than at the upper slope in all kinds of microhabitats. At the upper slope, the organic matter of soil, hydrolysis-nitrogen and rapid available potassium in stone crevice were the highest, and the content of available phosphorus in stone slot was the highest. At the foot slope, the contents of soil organic matter, hydrolysis-nitrogen and available phosphorus in stone slot were the highest, and the content of rapid available potassium in stone crevice was the highest.

关 键 词：小蓬竹 生境 理化性质 土壤 

分 类 号：S795.9[农业科学—林木遗传育种]