Distribution of Main Nutrients in Seedlings of Umbrella Bamboo (Fargesia murielae) at Its Native Home in Central China  

华中神农箭竹更新苗主要营养元素的分布(英文)

作　　者：王玲[1] 李昆[1] 孟银萍[1] 赵丽雅[1] 李兆华[1] 

机构地区：[1]湖北大学资源环境学院,湖北武汉430062

出　　处：《Agricultural Science & Technology》2012年第7期1469-1472,共4页农业科学与技术（英文版）

基　　金：国家自然科学基金(31070370)~~

摘　　要：[Objective] The paper was to study the distribution of main nutrients in seedlings of umbrella bamboo (Fargesia murielae) in Shennongjia National Nature Reserve. [Method] The study was conducted in Liangfengya of Shennongjia National Nature Reserve. In the field investigation, six clumps of umbrella bamboo grown independently were randomly selected and sampled. The total nitrogen, total phosphorus and total potassium of umbrella bamboo were detected by regular plant analysis method. The age classes of bamboo seedlings were ascertained by age grade backtracking method. [Result] In different organs, N, P, K contents in branches and leaves were significantly higher that than in stems. Along age grades, N and P contents performed "M" shape in branches and leaves, while K content approximately performed as normal distribution. [Conclusion] The nutrients distribution pattern of these seedlings is likely formed by its nutrition mechanism which allocates nutrients according to different needs or by external interference of environmental features. However, the specific causes still need further investigation.[目的]研究神农架自然保护区内的神农箭竹更新苗主要营养元素的分布结构。[方法]在神农架国家自然保护区内凉风垭设置样地,随机选取六丛独立生长的神农箭竹并完整取样,采用常规植物营养分析方法测定氮、磷、钾含量,神农箭竹更新苗的龄级采用倒逐龄法确定。[结果]在神农箭竹不同器官中,枝叶中N、P、K的含量均明显高于秆中的含量;不同龄级营养元素的分布规律为枝叶中的N、P元素含量随龄级增长均呈类"M"型变化,K含量分布近似正态分布。[结论]神农箭可能是由自身固有的营养机制使其根据不同生长需求分配营养元素或由外部环境因素的干扰形成,但具体的原因还需进一步的研究调查。

关 键 词：Fargesia murielae Nutrition mechanism Age grade NUTRIENT DISTRIBUTION 

分 类 号：S795.2[农业科学—林木遗传育种]