南京林业大学学报（自然科学版）2025，Vol.49Issue(5)：29-37,9.DOI:10.12302/j.issn.1000-2006.202402017
浙西南低山丘陵区林分类型对土壤碳氮磷化学计量特征的影响
Impacts of forest stand types on the stoichiometric characteristics of soil carbon,nitrogen,and phosphorus in low hilly region of southwest Zhejiang Province
摘要
Abstract
[Objective]The low hilly region of south China constitutes critical distribution areas for subtropical forests.This study investigates the stoichiometric characteristics of soil carbon,nitrogen,and phosphorus under typical stand types in these regions,as well as their influencing factors,to provide a theoretical foundation for soil fertility assessment and fertilization planning in the southern low hilly regions.[Method]This study focused on soils from four stand types in the low hilly region of southwestern Zhejiang Province,including Cunninghamia lanceolata forest,Pinus massoniana forest,C.lanceolata and P.massoniama mixed forest,and C.lanceolata and P.edulis mixed forest.We systematically analyzed the response patterns of soil organic carbon(SOC),total nitrogen(TN),and total phosphorus(TP)mass fractions,as well as their stoichiometric ratios(C/N,C/P,N/P),to stand type,soil depth,and available nutrients.Additionally,correlations among stoichiometric characteristics and allometric growth relationships between total nutrient mass fractions were investigated.[Result](1)In the 0-40 cm soil layer,soil TN and TP mass fraction exhibited statistically significant differences among the four stand types,with mean values of 1.20 and 0.19 g/kg,respectively.Both soil TN and TP reached their highest level in the C.lanceolata and P.edulis mixed forest.The mean values of the ratio of SOC to TN(C/N,mass fraction ratio,the same below)and the ratio of SOC to TP(C/P)in soil were 17.20 and 106.53,respectively.The soil C/N and C/P ratios in the C.lanceolata and P.edulis mixed forest were significantly lower than those in C.lanceolata forest and C.lanceolata and P.massoniama mixed forest.(2)With increasing soil depth,the mass fraction of soil SOC,TN,and TP exhibited a declining trend both in the aggregated dataset and within each individual stand type.In contrast,the soil C/N displayed an upward trend,while the nitrogen-to-phosphorus ratio(N/P)showed declining trend with depth.(3)Correlation analysis demonstrated significant positive correlations between soil SOC,TN,and TP mass fractions,as well as their associated stoichiometric ratios.Additionally,a significant positive correlation was identified between TN and TP mass fractions.Standardized major axis analysis demonstrated that the accumulation rate of soil TP mass fraction was slightly lower than that of TN,while being significantly lower than that of SOC.Redundancy analysis indicated that soil pH exerted a negative regulatory effect on the C/P ratio,while soil hydrolysable nitrogen significantly modulated both the mass fractions of TN and TP and their stoichiometric ratios.[Conclusion]Stand types in the low hilly region of western Zhejiang have significant effects on soil carbon and nutrient mass fractions and stoichiometric ratios.The C.lanceolata and P.edulis mixed forest may improve soil nutrient status by reducing soil acidification and other apporoaches.关键词
南方低山丘陵区/亚热带常绿混交林/土壤养分/化学计量特征Key words
low hilly region of south China/subtropical evergreen mixed forest/soil nutrient/stoichiometric characteristic分类
农业科技引用本文复制引用
周方,叶兰华,童冉,彭辉,朱念福,楼晨阳,苗永朝,吴统贵,沈庆华..浙西南低山丘陵区林分类型对土壤碳氮磷化学计量特征的影响[J].南京林业大学学报（自然科学版）,2025,49(5):29-37,9.基金项目
百山祖国家公园科学研究项目(2021KFLY12) （2021KFLY12）
中国林业科学研究院基本科研业务费专项资金项目(CAFYBB2022SY010). （CAFYBB2022SY010）
