2021年12月7日 星期二
氮沉降对闽楠幼苗生长、干物质分配及含水率的影响
Effects of nitrogen deposition on growth, dry matter allocation and moisture content in Phoebe bournei seedlings
2019年 第28卷 第1期 页码[118-120]    下载全文[0.8MB]  
Abstract

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.

关键词氮沉降; 闽楠; 生长; 干物质分配; 含水率
Key wordsnitrogen deposition; Phoebe bournei (Hemsl.) Yang; growth; dry matter allocation; moisture content
作者张根水1, 龚辉1, 洪滔2, 刘剑斌1, 肖应忠1, 苏少川1, 何俊1, 陈建忠1
所在单位1. 南平市建阳区林业局, 福建 南平 354200; 2. 福建农林大学林学院, 福建 福州 350002
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基金项目国家“十三五”重点研发计划项目(2017YFD0601304)