森林与环境学报2024，Vol.44Issue(5)：457-467,11.DOI:10.13324/j.cnki.jfcf.2024.05.002
施肥对杉木林不同土层温室气体排放的影响
Effects of fertilization on greenhouse gas emissions from different soil layers in a Chinese fir plantation
摘要
Abstract
To investigate the migration and transformation of greenhouse gases across soil layers,we examined the impact of fertilization on greenhouse gas emissions from the 0 to 40 cm soil layers in a subtropical Chinese fir plantation.Additionally,we identified the dominant factors regulating greenhouse gas emissions from various soil layers.Our findings revealed that forest soil acted as both a source of CO2 and N2 O and a sink for CH4.As soil depth increased,both CO2 and N2 O emissions decreased,along with CH4 absorption.Specifically,the CO2 and N2 O emissions and CH4 absorption from the 0 to 10 cm soil layer were 1.3-,2.5-,and 3.3-fold greater than those from the 30 to 40 cm layer,respectively.Fertilization significantly reduced soil CO2 emissions and CH4 uptake in each layer(P＜0.05).Compared with those of the unfertilized treatment,fertilization led to a substantial decrease in soil CO2 emissions(approximately 56.7%-77.5%)and CH4 absorption(approximately 30.4%-57.8%).Notably,the inhibitory effect of fertilization on these gases was most pronounced in the 30-40 cm and 20-40 cm soil layers.Furthermore,N2 O emissions decreased significantly in the 10-30 cm soil layers due to fertilization(P＜0.05),with the most obvious effect observed in the 10-20 cm layer.Overall,fertilization primarily reduced soil CO2 and N2O emissions and CH4 uptake by increasing soil moisture content.关键词
温室气体/土层深度/施肥/杉木人工林/二氧化碳/甲烷/氧化亚氮Key words
greenhouse gas/soil depth/fertilization/Chinese fir plantations/CO2/CH4/N2 O分类
农业科技引用本文复制引用
黄智军,谭世广,丁驰,祝嘉新,丘清燕,胡亚林..施肥对杉木林不同土层温室气体排放的影响[J].森林与环境学报,2024,44(5):457-467,11.基金项目
福建省科技厅自然科学基金项目"亚热带不同菌根类型树种根系/菌丝碳源输入对土壤有机碳转化过程的影响差异研究"(2023J01433) （2023J01433）
国家自然科学基金项目"亚热带典型森林土壤NO与N2O排放及其对氮沉降响应的微生物机制"(41703066). （41703066）
