不同竹龄灰竹地上部分生物量和氮磷钾含量分析  

Above-ground Biomass and N, P and K Content in Different Aged Phyllostachys nuda

作　　者：李晓东 LI Xiao-dong(Lishui Forestry Bureau of Zhejiang, Lishui 323000, China)

机构地区：[1]浙江省丽水市林业局开发区分局,浙江丽水323000

出　　处：《浙江林业科技》2018年第6期65-68,共4页Journal of Zhejiang Forestry Science and Technology

基　　金：浙江省丽水市林业局开发区分局项目(L2017001)

摘　　要：灰竹Phyllostachys nuda是重要的笋用竹种,研究其地上部氮磷钾含量和积累特性,可为养分管理提供基础。2017年8月,在灰竹样地调查的基础上,采集灰竹不同年龄标准株灰竹叶、枝、秆样品,分析其氮、磷、钾含量。结果表明,灰竹不同器官生物量大小为秆>枝>叶,分别是14 263.24,7 752.88,5 764.56 kg·hm^(-2);各器官氮磷钾含量大小次序表现为叶>枝>秆。叶、枝、秆平均氮含量分别为18.65,4.91,2.22g·kg^(-1),平均磷含量分别为0.71,0.50,0.45 g·kg^(-1),平均钾含量分别为6.29,5.52,4.81 g·kg^(-1),随着年龄的增长,叶片氮磷钾含量呈先下降后上升趋势,而枝、秆含量则逐渐下降;营养元素的积累量大小顺序为氮>钾>磷,其积累量分别为175.61,144.40,14.27 kg·hm^(-2)。叶、枝、秆中氮磷钾3种营养元素积累量分别为143.26,83.75,107.28 kg·hm^(-2),氮素在叶片中的分配率为60.2%,磷、钾在秆中的分配比率分别为45.8%,47.7%。Establishment of 4 sample plots was implemented at1-3-year Phyllostachys nuda forest in Lishui, Zhejiang province in August of 2017. Determinations were carried out on above ground biomass and N, P and K content. The results showed that above ground biomass of every aged Ph. nuda was ordered by culm >branch >leaf. Mean N, P and K content in above ground parts was followed by leaf >branch >culm of nutrient elements in different organs distribution of patterns indicated that the leaf >branch>culm. The mean content of N,P,K in leaf, branch and culm was 18.65,4.91 and 2.22 g·kg-1, 0.71,0.50,0.45 g·kg-1 and 6.29,5.52,4.81 g·kg-1. With increase age, the N, P and K content in leaves decreased first and then increased, while that content in branch and culm decreased gradually. Distribution rate of N was 60.2% in the leaf, of P and K was 45.8%, 47.7% in culm.

关 键 词：灰竹 器官 营养元素 含量 

分 类 号：S795[农业科学—林木遗传育种]