摘要
探究不同林分类型林地土壤C、N、P含量及储量的分布特征对评价森林生态系统养分循环具有重要意义,研究以江门市3种亚热带森林类型(天然阔叶林、人工阔叶林和人工针叶林)林地土壤为对象,对不同土层土壤的C、N、P含量和储量进行分析。结果表明,不同林分类型土壤养分含量及储量存在显著差异,各土层土壤C、N、P含量表现为:天然阔叶林>人工阔叶林>人工针叶林;土壤C、N含量的变化趋势为随土层增加而降低。3种林分类型的土壤养分储量在不同土层表现不一致,就总储量而言,天然阔叶林显著高于两种人工林分类型,P储量在底层80~100 cm土层土壤无显著差异。天然林较人工林而言,具有更良好的土壤养分循环累积机制,阔叶林较针叶林而言,受P限制的影响较弱。
It is of great significance to explore the distribution characteristics of soil C, N and P contents and reserves in different stand types for evaluating the nutrient cycle of forest ecosystem. In this study, the contents and reserves of C, N and P in three subtropical stand types(natural broad-leaved forest, artificial broad-leaved forest and artificial coniferous forest) in Jiangmen city were analyzed. The results showed that there were significant differences in soil nutrient contents and storage among different stand types. Soil C, N and P contents in different soil layers were as follows: natural broad-leaved forest>artificial broad-leaved forest>artificial coniferous forest;The content of C and N in soil decreased with the increase of soil layer. The soil nutrient reserves of the three stand types were not consistent in different soil layers. In terms of total nutrient reserves, the natural broad-leaved forest was significantly higher than the two artificial stand types, and there was no significant difference in P storage in the bottom 80~100 cm soil layer. Compared with plantation forest, natural forest has better soil nutrient cycling accumulation mechanism, and broad-leaved forest is less affected by P constraint than coniferous forest.
作者
许窕孜
邹祖有
叶彩红
张耕
张中瑞
朱航勇
何茜
丁晓纲
XU Tiaozi;ZOU Zuyou;YE Caihong;ZHANG Geng;ZHANG Zhongrui;ZHU Hangyong;HE Qian;DING Xiaogang(College of Forestry and Landscape Architecture,South China Agricultural University,Guangzhou,Guangdong510642,China;Guangdong Provincial Key Laboratory of Silviculture,Protection and Utilization/Guangdong Academy of Forestry,Guangzhou,Guangdong 510520,China)
出处
《林业与环境科学》
2022年第3期34-38,共5页
Forestry and Environmental Science
基金
广东省生态林业建设项目“林地土壤调查”
广东省林业科技计划项目(2019-07)
广东省省级生态公益林效益补偿资金省统筹经费项目。
关键词
亚热带
林分类型
土壤养分
碳氮磷储量
森林生态系统
subtropical
stand type
soil nutrients
carbon
nitrogen and phosphorus reserves
forest ecosystem
