广西林业科学2024，Vol.53Issue(3)：344-351,8.DOI:10.19692/j.issn.1006-1126.20240310
不同杉木林分类型土壤养分特征及其与凋落物养分的关系
Soil Nutrient Characteristics of Different Cunninghamia lanceolata Stand Types and Relationships with Litter Nutrients
摘要
Abstract
In order to investigate effects of Cunninghamia lanceolata mixed plantations on soil nutrients,taking C.lanceolata pure plantation,mixed plantation of C.lanceolata and Mytilaria laosensis and mixed plantation of C.lanceolata and Michelia macclurei as research objects,soils in 0-20 and 20-40 cm soil layers were collect-ed,and litters were collected and classified.Physical properties of soils,contents of nitrogen,phosphorus,potas-sium and their available components,organic carbon,calcium and magnesium in soils and litters were deter-mined.Correlation analysis and redundancy analysis were used to analyze changes of soil nutrient contents in different C.lanceolata stand types and effects of litter nutrient contents on soil nutrient contents.Results showed that pH value,bulk density,water content and contents of organic carbon,total nitrogen,alkali-hydro-lyzable nitrogen,total potassium,available potassium and calcium in soils were significantly affected by stand type,and soil nutrient contents(except for total potassium and available potassium)in mixed plantations were higher than those in pure plantation.In the same stand type,nutrient contents in 0-20 cm soil layer were higher than those in 20-40 cm soil layer,all of which reached significant or extremely significant differences.Results of correlation analysis on soil nutrient contents showed that there were effects among soil nutrients.Litter nutri-ent contents in different stand types were different.Results of redundancy analysis showed that soil nutrient content was significantly affected by content of magnesium in litter of broad leaves and content of total potassi-um in litter of needle leaves in 0-20 cm soil layer.Soil nutrient content was significantly affected by contents of magnesium in litters of broad leaves and others in 20-40 cm soil layer.Mixture of C.lanceolata and broad-leaved tree species showed positive effects on accumulations of soil nutrients.Stand type affected litter nutrients and affected soil nutrient contents by changing contents of magnesium and potassium in litters.关键词
土壤养分/凋落物养分/冗余分析/杉木混交林Key words
soil nutrient/litter nutrient/redundancy analysis/Cunninghamia lanceolata mixed plantation分类
林学引用本文复制引用
蒋晨阳,李宪,李林欣,吴昊,卢志锋..不同杉木林分类型土壤养分特征及其与凋落物养分的关系[J].广西林业科学,2024,53(3):344-351,8.基金项目
广西创新驱动发展专项课题(桂科AA17204087-8) （桂科AA17204087-8）
中央财政林业科技推广项目(2022TG26号) （2022TG26号）
