热带农业工程2026，Vol.50Issue(4)：51-57,7.DOI:10.27056/j.issn2096-725X.2026.04.011
不同品种热带果园凋落物量及土壤养分特征研究
Study on Litter Quantity and Soil Nutrient Characteristics in Different Tropical Orchards
摘要
Abstract
Orchards not only hold significant economic value but also play crucial ecological roles.As litter serves as a key component in the nutrient cycling of orchard ecosystems,this study investigates the monthly dynamics of litter quantity,water absorption characteristics,nutrient return patterns,and their relationship with soil pH in rambutan,mangosteen,and lychee orchards.The aim is to provide a theoretical basis for the management of tropical orchard ecosystems and nutrient regulation.This re-search was conducted in rambutan,mangosteen,and lychee orchards in Baoting County,Hainan Province.Litter samples were collected monthly to measure dry weight,water absorption rate,and the return amounts of nitrogen,phosphorus,potassium,and carbon.Simultaneously,soil water absorp-tion rates and pH at different soil layers were determined to analyze interspecific differences and their correlations.The results indicate that the monthly dynamics of litter in all three fruit trees exhibited a bi-modal curve,with peaks concentrated in September.The annual total litter amount was highest in the lychee orchard(4.59 t/hm2)and lowest in the mangosteen orchard,though interspecific differences were not significant.Litter water absorption rates peaked in August,showing a unimodal curve.The soil water absorption rate in the 0-20 cm layer exhibited an opposite trend to that of litter,while the trends in the 20-40 cm layer varied among species,though no significant differences were ob-served.The phosphorus return in lychee plots was significantly higher than that in mangosteen plots,and the potassium return in rambutan plots was significantly positively correlated with soil pH.No sig-nificant correlations were found between the return of other elements and soil pH.The dynamics and water absorption characteristics of litter in tropical orchards are jointly influenced by tree species and seasonal factors.Nutrient return via litter exhibits element specificity,with potassium return in rambu-tan being closely related to soil acidity.It is recommended that orchard management practices incorpo-rate species-specific characteristics for targeted nutrient regulation.关键词
红毛丹/荔枝/山竹/凋落物/土壤理化性质Key words
Rambutan/Mangosteen/Lychee/litter/soil physicochemical properties分类
农业科技引用本文复制引用
杨鹤明,王春燕,王定程..不同品种热带果园凋落物量及土壤养分特征研究[J].热带农业工程,2026,50(4):51-57,7.基金项目
2022年海南省自然科学基金高层次人才项目(No.322RC878). （No.322RC878）
