施肥对黑木相思幼林生长和形质性状的影响  

Effect of Fertilization Application on Growth and Form Traits in Young Forest of Acacia melanoxylon

作　　者：林国胜 朱帅群 包以秋 刘凰英 裘珍飞[2] LIN Guosheng;ZHU Shuaiqun;BAO Yiqiu;LIU Huangying;QIU Zhenfei(Wengyuan Forestry Bureau,Shaoguan,Guangdong 512600,China;Research Institute of Tropical Forestry,Chinese Academy of Forestry,Guangzhou,Guangdong 510520,China)

机构地区：[1]翁源县林业局,广东韶关512600 [2]中国林业科学研究院热带林业研究所,广东广州510520

出　　处：《林业与环境科学》2020年第3期44-47,共4页Forestry and Environmental Science

基　　金：中央级公益性科研院所基本科研业务费专项资金重点项目(CAFYBB2018ZB004)。

摘　　要：造林6个月后追施不同用量N肥和NPK配比复合肥,测量1年生黑木相思Acacia melanoxylon生长和形质指标、分析施肥效果,旨在为幼林的科学抚育管理提供参考。结果表明:追肥显著促进了幼林冠幅和大分枝数增长,对树高影响不显著。综合比较,纯N肥效果最好,其次PK肥,再次为NPK肥。纯N肥中,100 g/株用量可显著提高树高、胸径等生长;随着N肥用量的增大,树高1.0-1.5 m区域的大分枝分布概率增大;叶片中N含量与树高和胸径,P含量与胸径和枝下高具有显著正相关。因此追肥有利于促进黑木相思幼林生长,加速郁闭,同时需要及时干预粗大分枝的竞争。To provide an efficient plan for one-year-old young forest tending in Acacia melanoxylon,the growth response to fertilize various amount of N or N\P\K was studied.Nitrogen(N)individual and N\Phosphate(P)\potassium(K)combined fertilizer application were developed and their important growth traits were profiled after 6 months.The result showed that fertilizer application significantly promoted the increasing of crown breadth and major branches numbers of A.melanoxylon plants.However,it had no obvious effect in tree height.Comprehensive analysis showed that individual N-fertilizer application was better than P and K combined or N/P/K.It was also found that individual application with 100 g urea per plant was suitable to A.melanoxylon growth.Interestingly,with increasing N-fertilizer,more major branches were happened in the region of 1.0-1.5 m high.N content in leaves and tree height and DBH,P content in leaves and DBH and CBH showed positive correlation.In summary,suitable fertilizer is beneficial to promote young forest growth of A.melanoxylon,accelerate the young forest canopy closure.Meanwhile,it is necessary to adjust and treat thick branches promptly.

关 键 词：黑木相思 追肥 生长 形质性状 

分 类 号：S791.244[农业科学—林木遗传育种]