沙地樟子松天然林土壤肥力变化的研究  

Change of Soil Fertility in Pinus sylvestris var. mongolica Natural Forest in Sandy Land

作　　者：闫德仁[1] 钟贵廷 杜敏 张宝珠 王玉华 敖文明 乔殿学 

机构地区：[1]内蒙古自治区林业科学研究院,内蒙古呼和浩特010010 [2]呼伦贝尔市林业研究所,内蒙古海拉尔021000 [3]鄂温克旗林业局,内蒙古巴彦套海021100

出　　处：《内蒙古林业科技》2009年第3期1-4,共4页Journal of Inner Mongolia Forestry Science and Technology

基　　金：国家科技支撑项目(编号:2006BAD26B0402);科技厅项目(编号:20060305)资助

摘　　要：从土壤养分含量、颗粒组成和腐殖质特征方面研究了呼伦贝尔沙地樟子松天然林土壤肥力变化特征。结果表明,随着沙地樟子松天然林年龄的增加,土壤有机质含量、全氮、全磷和速效磷含量表现出明显的增加趋势,而土壤速效氮含量反而降低,土壤pH值则具有降低的规律。土壤颗粒组成主要集中在20-200 nm之间,平均含量为63.04%-33.49%。沙地樟子松天然林在生长过程中,对土壤腐殖质组成及其含量具有显著影响,并且随着林龄增加,有利于形成良好的土壤腐殖质结构,提高土壤的保肥能力。The characteristics of change of soil fertility in Pinus sylvestris var. mongolica natural forest in Hulunbeier sandy land has been studied at some aspects such as soil nutrients content, particle composition and humus feature. The results showed ： with the increase of age of Pinus sylvestris var. mongolica natural forest, soil organic matter content, total nitrogen content, total phosphate content and available phosphate content have increased, but soil available nitrogen content has decreased, and the soil pH value has decreased. Soil particle composition has mainly gathered from 20 nm to 200 nm, with average content at 63.04% -93.49%. During growth, Pinus sylvestris var. mongolica natural forest in Hulunbeier sandy land can obviously influence the soil humus composition, and with the increase of forest age, it＇s favorable to form good soil humus structure and improve the soil nutrient preserving capacity.

关 键 词：呼伦贝尔沙地 天然樟子松林 养分变化 腐殖质特征 

分 类 号：S791.253[农业科学—林木遗传育种]