氮添加对不同植被类型中毛竹与常绿阔叶林木生长的影响  

Effect of Nitrogen Addition on the Growth of Phyllostachys edulis and Evergreen Broad-leaved Trees in Different Vegetation Types

作　　者：赖雁南 钟全林[1,2,3] 李宝银 程栋梁 余华[1,4] 徐朝斌 薛翔海[1] 郑文婷 Lai Yannan;Zhong Quanlin;Li Baoyin;Cheng Dongliang;Yu Hua;Xu Chaobin;Xue Xianghai;Zheng Wenting(College of Geographical Sciences,Fujian Normal University,Fuzhou 350007,China;State Key Laboratory Breeding Base of Humid Subtropical Mountain Ecology,Fuzhou 350007,China;Fujian Province Key Laboratory of Plant Eco-physiology,Fujian Normal University,Fuzhou 350007,China;College of Oceanography,Minjiang University,Fuzhou 350108,China;College of Environment and Resources,Fuzhou University,Fuzhou 350000,China)

机构地区：[1]福建师范大学地理科学学院,福建福州350007 [2]湿润亚热带山地生态国家重点实验室培育基地,福建福州350007 [3]福建师范大学福建省植物生理生态重点实验室,福建福州350007 [4]闽江学院海洋学院,福建福州350108 [5]福州大学环境与资源学院,福建福州350000

出　　处：《防护林科技》2021年第2期1-7,共7页Protection Forest Science and Technology

基　　金：国家自然科学基金项目(31971643,41601008);福建省科技厅产学合作项目(2019N5009);福建省杰出青年基金项目(2018J07003);福建省基金面上项目(2018J01737,2018J01479);国家重点研发计划项目(2017YFCO505400)。

摘　　要：氮沉降背景下毛竹向常绿阔叶林扩张问题是当前我国亚热带区域面临的主要生态问题与研究热点之一。以毛竹、竹阔混交林及常绿阔叶林为对象,通过1 a的氮添加试验,分析毛竹与常绿阔叶林木在不同植被类型中生长的差异,以探究氮沉降对不同植被类型中毛竹与常绿阔叶林木生长的影响。结果显示:(1)竹阔混交林中毛竹的平均胸径增长量、平均单株生物量增长量及生物量相对生长速率高于毛竹林中的毛竹,但竹阔混交林中阔叶林木的平均胸径增长量、平均单株生物量增长量及生物量相对生长速率则显著低于常绿阔叶林中的阔叶林木(P<0.05);(2)低氮添加会减小毛竹在竹阔混交林与毛竹林中的个体差异,但会增大常绿阔叶林木在竹阔混交林与常绿阔叶林之间的生长差距,低氮添加有利于毛竹向常绿阔叶林扩张;(3)高氮添加会显著抑制毛竹的生长,一定程度上可减缓毛竹向常绿阔叶林扩张的速度。The expansion of Phyllostachys pubescens to evergreen broad-leaved forests under the background of nitrogen deposition is one of the main ecological problems and research hotspots facing China's subtropical regions.Taking Phyllostachys edulis,Phyllostachys edulis-evergreen broad-leaved mixed forest and evergreen broad-leaved forest as the object,the growth difference between Phyllostachys edulis&evergreen broad-leaved forest in different vegetation types were analyzed through 1-year nitrogen addition test,and explores the influence of Phyllostachys edulis expansion into evergreen broad-leaved forest under the background of nitrogen deposition on the growth of Phyllostachys edulis and evergreen broad-leaved forest.Results showed that:(1)In Phyllostachys edulis-evergreen broad-leaved mixed forest average growth in DBH,average individual biomass growth and biomass per plant relative growth rate is greater than Phyllostachys edulis in Phyllostachys edulis forest,Phyllostachys edulis-evergreen broad-leaved mixed forest,evergreen broad-leaved forest significant differences mainly growth parameters,Phyllostachys edulis expansion leads to the average individual DBH growth rates of evergreen broad-leaved forest biomass growth and biomass per plant and average relative growth rate dropped significantly;(2)Low nitrogen addition can reduce the growth difference of Phyllostachys edulis in Phyllostachys edulis-evergreen broad-leaved mixed forest and Phyllostachys edulis forest,but increase the growth difference of evergreen broad-leaved forest in Phyllostachys edulis-evergreen broad-leaved mixed forest and evergreen broad-leaved forest.Low nitrogen addition is beneficial to the expansion of Phyllostachys edulis into evergreen broad-leaved forest;(3)The addition of high nitrogen can significantly inhibit the growth of Phyllostachys edulis and alleviate the expansion of Phyllostachys edulis to evergreen broad-leaved forest.

关 键 词：氮添加 生物量 相对生长速率 毛竹 常绿阔叶林木 

分 类 号：S714.8[农业科学—林学] S718.54