生态学杂志2024，Vol.43Issue(7)：2102-2108,7.DOI:10.13292/j.1000-4890.202407.040
氮添加加剧了海南岛尖峰岭热带山地雨林次生林植物生长的磷限制
Nitrogen addition exacerbated phosphorus limitation of plant growth in a secondary tropical montane rain-forest of Hainan
摘要
Abstract
Human activities have changed soil nitrogen(N)and phosphorus(P)availability,which potentially affects ecosystem nutrient cycling.To explore nutrient limitation status of different forest types,we evaluated the response of soil and foliar N and P contents to N and P addition in an 11-year continuous fertilization experiment in both primary and secondary montane rainforests.We found that(1)N addition did not affect soil and foliar N and P contents in both primary and secondary forests.In contrast,P addition significantly increased soil available P contents but had no effect on foliar N and P contents in both forests.(2)Foliar N∶P ratios were higher than 16 in CK treatment of both forests.Foliar N∶P significantly decreased after P and NP additions in both forests.N addi-tion significantly increased foliar N∶P of the secondary forest,but not in the primary forest.(3)Soil available N was significantly correlated with available P in the secondary forest,but not in the primary forest.In contrast,there was a significant negative correlation between foliar N∶P and soil available P in both forests.In summary,our findings indicate that P is the limiting factor for plant growth in tropical mountain rainforests.P addition could effec-tively alleviate P limitation.In addition,N addition aggravated P limitation in the secondary forest but not in the primary forest.This study provides an important reference for understanding nutrient limitation pattern of ecosystems in the context of global change.关键词
氮添加/磷添加/热带雨林/营养元素限制/氮磷比Key words
nitrogen addition/phosphorus addition/tropical rainforest/nutrient limitation/N∶P ratio引用本文复制引用
游慧敏,查苏娜,吴桂林,陈德祥,张涛,旷远文,吴建辉,周璋..氮添加加剧了海南岛尖峰岭热带山地雨林次生林植物生长的磷限制[J].生态学杂志,2024,43(7):2102-2108,7.基金项目
中央级公益性科研院所基本科研业务费专项资金(CAFYBB2020ZE002)、国家自然科学基金(31872701、41773071和41771040)、国家林业局"尖峰岭生态定位站运行补助"计划、科技部"海南尖峰岭森林生态系统国家野外科学观测研究站"后补助经费资助. （CAFYBB2020ZE002）
