不同密度大叶相思的养分积累和分配规律  

Nutrient Accumulation and Distribution of Acacia Auriculaeformisin Different Densities

作　　者：蔡金桓 廖明新 薛立[1] Cai Jinhuan Liao Mingxing Xue Li(College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, Guangdong, 510642, China Xiaokeng forest farm, Shaoguan, Guangdong, 512162, China)

机构地区：[1]华南农业大学林学与风景园林学院,广东广州510642 [2]广东省韶关市曲江区国营小坑林场,广东韶关512162

出　　处：《绿色科技》2017年第11期71-73,77,共4页Journal of Green Science and Technology

基　　金：广东省林业厅项目(编号:粤财农2015-159号)

摘　　要：对不同密度的4年生大叶相思林的养分含量进行了研究,以便为合理管理和利用大叶相思人工林提供理论依据。研究结果表明:3种密度大叶相思林的各器官养分浓度以N的浓度最高,占养分总浓度的64%左右,K浓度居中,为32%左右,P的浓度最低,仅4%左右;各器官养分浓度都为叶>枝>皮>根>干;高密度林分的各器官养分贮量为叶>枝>根>干>皮,中密度为叶>枝>干>根>皮,低密度为叶>干>枝>根>皮;林分养分总贮量为高密度>中密度>低密度;各器官中各养分贮量为N>K>P。The organ nutrient content of trees was studied in Acacia auriculaeformisstands in different densities to provide theoretical basis for rational utilization and management of A. auriculaeformis stands. The results showed that the concentration of N was the highest in the nutrient concentration of the three organs, accounting for about 64% ; the concentration of K was about 32% ; the concentration of P was the lowest, only about 4%. Generally, the nutrient content was leaves 〉branehes〉stem〉roots ;bark. The total amount of nutrients in various organs decreased in the order of leaves〉branches〉roots〉stem〉bark for the high-density stand; leaves〉branches〉 stem 2〉roots〉bark for the middle-density stand〉 leaves 2〉 stem 〉 branches 〉roots bard for the low-density stand. The amount of nutrients in the three stands was high-density stand 〉 middledensity stand 2〉 low-- density stand. The amount of nutrients was N 〉K 〉P.

关 键 词：大叶相思 林分密度 养分浓度 养分贮量 

分 类 号：S725.6[农业科学—林木遗传育种]