亚热带农业研究2024，Vol.20Issue(1)：48-54,7.DOI:10.13321/j.cnki.subtrop.agric.res.2024.01.008
不同温度下4种速生树种凋落叶的浸泡分解特性
Soaking and decomposition characteristics of litter leaves of four fast-growing tree species at different temperatures
摘要
Abstract
[Purpose]After soaking,the effects of tree species and environmental temperature on the decomposition characteristics of litter leaves of fast-growing tree species were investigated,to predict the ecological function of fast-growing tree species in re-sponse of the context of climate change.[Method]The litter of four fast-growing southern tree species(Pine spp.,Cunninghamia lanceolata,Eucalyptus spp.and Castanopsis hystrix)were collected and soaked for 22 days at ambient temperatures,20℃,or 35℃,respectively.After soaking,content of total phosphorus,total nitrogen,humic acid,COD,tannic acid,and turbidity,con-ductivity,pH of the four litter leaves were investigated and compared.[Result]Temperature significantly affected the turbidity changes of soaking solution of four fast-growing tree species(P<0.05).After 22 days of soaking,the effects of decomposition of Eu-calyptus litter leaves on tannic acid content,humic acid content and pH were greater than those of other 3 tree species.Tannin con-tent of soaked Eucalyptus litter leaves reached 1 407.84 mg·L-1,which was 12,14,and 4-fold higher than those of Pine spp.,Cunninghamia lanceolata,and Castanopsis hystrix,respectively;the amount of humic acid reached 871.40 mg·L-1,which was 15,14,and 12-fold higher than those of Pine spp.,Cunninghamia lanceolata,and Castanopsis hystrix,respectively;the pH re-mained between 4.35 and 4.46,lower than other 3 tree species.[Conclusion]The turbidity of soaking solution was mainly affected by temperature,and the changes in other indices varied with different tree species.Ambient temperature can promote the release of tannic acid from soaking solution of Eucalyptus litter leaves more than either constant temperature condition,leading to a decrease in the pH value of the soaking solution.关键词
速生树种/凋落叶/温度/浸泡液/单宁酸Key words
fast-growing tree species/litter leaves/temperature/soaking solution/tannin acid分类
农业科技引用本文复制引用
伍琪,李德满,韦振道,彭玉华,邓紫宇,任世奇..不同温度下4种速生树种凋落叶的浸泡分解特性[J].亚热带农业研究,2024,20(1):48-54,7.基金项目
广西林业科技推广示范项目"桉树化学成分分析及其高值化利用研究"(桂林科研[2021]28 号) （桂林科研[2021]28 号）
广西重点研发计划项目"桉树人工林与桉木主要林产品的碳储存计量研究"(桂科AB23026010) （桂科AB23026010）
广西科技基地和人才专项"南宁桉树森林生态系统广西野外科学观测研究站(科研能力建设)"(桂科23-026-272). （科研能力建设）
