摘要
Growth,dry matter allocation and moisture content in 1-year-old seedlings of Phoebe bournei(Hemsl.)Yang were compared under simulated nitrogen depositions of 0(the control),5,10,15,20,25 and 30 g·m^-2·a^-1.The results show that with enhancing of nitrogen deposition,height,basal diameter,dry masses of root,stem,leaf and above-ground part per plant,and dry mass of whole plant of P.bournei show a trend of“increasing-decreasing-increasing”,each index under nitrogen depositions of 5,10 and 15 g·m^-2·a^-1 is generally significantly higher than that of the control.Root/shoot ratio and dry matter allocation percentage of root of P.bournei under nitrogen depositions are lower than those of the control,and those under nitrogen depositions of 5,10 and 30 g·m^-2·a^-1 are significantly lower than those of the control;while dry matter allocation percentage of stem is higher than that of the control,and that under nitrogen depositions of 5,10 and 30 g·m^-2·a^-1 is significantly higher than that of the control;and the change of dry matter allocation percentage of leaf is not obvious.Under nitrogen depositions,the change of moisture contents in root,stem and leaf of P.bournei is small,but that in whole plant is obvious.It is suggested that there is a certain effect of nitrogen deposition on growth,dry matter allocation and moisture content in P.bournei seedlings,in addition,low nitrogen deposition can promote the growth of P.bournei seedlings,while high nitrogen deposition can inhibit their growth.
Growth, dry matter allocation and moisture content in 1-year-old seedlings of Phoebe bournei(Hemsl.) Yang were compared under simulated nitrogen depositions of 0(the control), 5, 10, 15, 20, 25 and 30 g·m^(-2)·a^(-1). The results show that with enhancing of nitrogen deposition, height, basal diameter, dry masses of root, stem, leaf and above-ground part per plant, and dry mass of whole plant of P. bournei show a trend of "increasing-decreasing-increasing", each index under nitrogen depositions of 5, 10 and 15 g·m^(-2)·a^(-1) is generally significantly higher than that of the control. Root/shoot ratio and dry matter allocation percentage of root of P. bournei under nitrogen depositions are lower than those of the control, and those under nitrogen depositions of 5, 10 and 30 g·m^(-2)·a^(-1 ) are significantly lower than those of the control; while dry matter allocation percentage of stem is higher than that of the control, and that under nitrogen depositions of 5, 10 and 30 g·m^(-2)·a^(-1) is significantly higher than that of the control; and the change of dry matter allocation percentage of leaf is not obvious. Under nitrogen depositions, the change of moisture contents in root, stem and leaf of P. bournei is small, but that in whole plant is obvious. It is suggested that there is a certain effect of nitrogen deposition on growth, dry matter allocation and moisture content in P. bournei seedlings, in addition, low nitrogen deposition can promote the growth of P. bournei seedlings, while high nitrogen deposition can inhibit their growth.
作者
张根水
龚辉
洪滔
刘剑斌
肖应忠
苏少川
何俊
陈建忠
ZHANG Genshui;GONG Hui;HONG Tao;LIU Jianbin;XIAO Yingzhong;SU Shaochuan;HE Jun;CHEN Jianzhong(Forestry Bureau of Jianyang District in Nanping City,Nanping 354200,China;College of Forestry,Fujian Agriculture and Forestry University,Fuzhou 350002,China))
出处
《植物资源与环境学报》
CAS
CSCD
北大核心
2019年第1期118-120,共3页
Journal of Plant Resources and Environment
基金
国家"十三五"重点研发计划项目(2017YFD0601304)
关键词
氮沉降
闽楠
生长
干物质分配
含水率
nitrogen deposition
Phoebe bournei(Hemsl.)Yang
growth
dry matter allocation
moisture content
