亚热带10个树种人工幼林凋落物量及养分归还量特征分析  

Characteristic Analysis of Litterfall Amount and Nutrient Return of 10 Tree Species in Artificial Young Forests in Subtropical Region

作　　者：朱敏 贾辉 万晓华[1,2] ZHU Min;JIA Hui;WAN Xiao-hua(College of Geographic Sciences,Fujian Normal University,School of Carbon Neutrality Future Technology,Fuzhou,Fujian 350100,China;Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology,Fuzhou,Fujian 350100,China)

机构地区：[1]福建师范大学地理科学学院,碳中和未来技术学院,福建福州350100 [2]湿润亚热带山地生态国家重点实验室培育基地,福建福州350100

出　　处：《福建农业科技》2022年第12期31-37,共7页Fujian Agricultural Science and Technology

基　　金：国家自然科学基金项目(32271842)。

摘　　要：为了评估凋落物在亚热带森林养分循环中的生态作用,选择亚热带10个树种人工幼林为研究对象,分析不同树种间凋落物年产量的差别,以及碳、氮、磷养分归还量的特征和影响因素。结果表明:米老排年凋落物量、碳归还量、磷归还量最高,分别为676.24、416.77、0.27 g·m^(-2);福建柏年凋落物量、碳归还量和磷归还量最低,分别为105.23、53.49、0.03 g·m^(-2);闽粤栲凋落物氮归还量最高,为6.17 g·m^(-2);马尾松凋落物氮归还量最低,为0.73 g·m^(-2)。亚热带人工幼林凋落物碳归还量随着凋落物碳、氮含量的增加而降低;凋落物氮归还量随着凋落物碳、磷含量的增加而降低,随着凋落物氮含量的增加而增加;凋落物磷归还量随着凋落物碳含量的增加而降低。研究显示亚热带人工幼林凋落物碳、氮、磷养分归还量受到凋落物碳、氮、磷养分元素含量的共同调控。In order to evaluate the ecological role of litterfall in the nutrient cycling in subtropical forests,the artificial young forests of 10 tree species in subtropical region were selected as the research objects to analyze the difference of annual litterfall yield among different tree species,and the characteristics and influencing factors of the nutrient return amount of carbon,nitrogen and phosphorus.The results showed that the annual litterfall amount,carbon return amount and phosphorus return amount in Mytilaria laosensis were the highest,which were 676.24 g·m^(-2),416.77 g·m^(-2),and 0.27 g·m^(-2),respectively.The annual litterfall amount,carbon return amount and phosphorus return amount in Fokienia hodginsii were the lowest,which were 105.23 g·m^(-2),53.49 g·m^(-2),and 0.03 g·m^(-2),respectively.The return amount of nitrogen in litterfall of Castanopsis fissa was the highest(being 6.17 g·m^(-2)),while Pinus massoniana had the lowest return amount of nitrogen in litterfall(being 0.73 g·m^(-2)).The return amount of carbon in litterfall of artificial young forests in subtropical region decreased with the content increase of carbon and nitrogen in litterfall.The return amount of nitrogen in litterfall decreased with the content increase of carbon and phosphorus in litterfall,and increased with the content increase of nitrogen in litterfall.The return amount of phosphorus in litterfall decreased with the content increase of carbon in litterfall.The study indicated that the return amount of carbon,nitrogen and phosphorus in litterfall of artificial young forests in subtropical region was jointly regulated by the contents of carbon,nitrogen and phosphorus in litterfall.

关 键 词：亚热带 人工幼林 凋落物量 养分归还量 

分 类 号：S718.5[农业科学—林学]