杉木人工林杉木绿叶与凋落叶分解速率对比  

Comparison of Decomposition Rates of Green Leaves and Fallen Leaves of Chinese Fir in Subtropical Zone

作　　者：韩雨承 宋豪威 林成芳[1,2,3] HAN Yucheng;SONG Haowei;LIN Chengfang(Institute of Geography,Fujian Normal University,Fuzhou 350117,China;School of Geographical Sciences,School of Carbon Neutrality Future Technology,Fujian Normal University,Fuzhou 350117,China;State Key Laboratory of Humid Subtropical Mountain Ecology,Fujian Normal University,Fuzhou 350117,China)

机构地区：[1]福建师范大学地理研究所,福州350117 [2]福建师范大学地理科学学院、碳中和未来技术学院,福州350117 [3]福建师范大学湿润亚热带山地生态国家重点实验室培育基地,福州350117

出　　处：《亚热带资源与环境学报》2024年第1期102-108,126,共8页Journal of Subtropical Resources and Environment

基　　金：国家自然科学基金资助项目(31300523、31600433);福建省属公益类科研院所专项(2020R1002003)。

摘　　要：以亚热带杉木人工林绿叶和杉木凋落叶为对象,研究其理化性质和分解速率的变化。结果表明,杉木绿叶和凋落物分解和养分释放动态特征相似,但杉木凋落叶的分解速率和养分释放均快于绿叶。2年分解期内,两种叶含水率显著降低,分解速率也都有降低,且杉木凋落叶处理间差异显著,2年分解期结束,两种叶的质量残留率在23%~38%之间。2年分解期内,两种叶分解速率呈现快-慢的变化。杉木凋落叶的分解速率快于绿叶。相关分析表明C∶N和木质素∶N与凋落叶分解速率的相关性较高,说明凋落叶分解速率主要受C∶N和木质素∶N的影响。In this study,the changes of physical and chemical properties and decomposition rate of Chinese fir(Cunninghamia lanceolata)green leaves and fallen leaves in subtropical China were studied.The results showed that,the decomposition and nutrient release of Chinese fir leaves and litter were similar,however the decomposition rate and nutrient release of Chinese fir leaves were faster than those of green leaves.During the two-year decomposition period,the water content and decomposition rate of the two leaves decreased significantly.There was a significant difference between the two treatments.During the two-year decomposition period,the changing trend of decomposition rates of the two kinds of leaves changed is from fast to slow.The decomposition rate of fallen leaves was faster than that of green leaves.The correlation analysis showed that C∶N and lignin∶N were highly correlated with the decomposition rate of fallen leaves,indicating that the decomposition rate of fallen leaves was mainly affected by C∶N and lignin∶N.

关 键 词：亚热带杉木人工林 凋落叶 杉木绿叶 分解速率 

分 类 号：S714.2[农业科学—林学]