摘要
利用Li-8100开路式土壤呼吸仪测定蒋家沟流域10、16、27年生银合欢林(Leucaena leucocephala (Lam.) de Wit)的土壤呼吸、温湿度,基于单因素方差分析和Pearson相关性分析方法,研究了泥石流频发区土壤呼吸与土壤理化性质之间的关系。结果显示:1)不同林龄银合欢生长季土壤呼吸速率的日动态变化规律基本一致,其土壤呼吸速率、温度、湿度变化趋势随时间推移均呈现出规则的单峰变化曲线,土壤呼吸速率表现为10年生>16年生>27年生;2)不同林龄银合欢生长季土壤呼吸与温度和湿度间呈显著正相关(p<0.05);3)不同林龄根系和凋落物处理对土壤呼吸的贡献随着林龄的增加而增大;4)土壤呼吸与土壤有机质(SOC)、全氮(TN)、水解氮(AN)、蔗糖酶和孔隙度间均呈现显著正相关(p<0.05),但过氧化氢酶与土壤呼吸没有显著的相关性(p>0.05),不同林龄孔隙度、养分、酶含量变化表现为随着林龄增大而减小。5)干热河谷地区银合欢林土壤呼吸随林龄增大而减小,并可用土壤理化性质来解释生长季土壤呼吸的变化特征。
This paper aimed to find the relationship between soil respiration and soil physical and chemical properties by single factor analysis of variance and Pearson correlation analysis. The soil respiration,temperature and moisture in the different forest ages （10, 16 and 27 year-old） of L. leucocephala （Lam.） de Wit were determined by using the Li-8100 open-lype soil respiration apparatus. The results showed that： （1） the soil respiration rate in different ages of L. leucocephcda （Lam.） de Wit had the same diurnal dynamics during the growing season and all curves of soil respiration, temperature and moisture showed regular and single peak curves in different time. The sequence of soil respiration in different ages of L. leueocephalct （Lam.） de Wit follows as： 10 a〉16 a〉27 a. （2） Soil temperature and mois- ture significantly affected the soil respiration rate （p〈0.05） in different ages of L. leucocephala （Lam.） de Wit. （3） Root exclusion and litter treatment enhanced soil respiration with the ages of L. leucocephala （Lam.） de Wit. （4） The soil respiration showed a significant positive correlation with soil organic matter （SOC）, total nitrogen （TN）, available nitrogen （AN）, Inverlase and soil porosity （p〈0.05）, but Catalase had no obvious relationship with soil respiration （p〉0.05）.In addition, soil porosity, nutrient content and enzyme of L. leucocephala （Lam.） de Wit decreased with the age of forest. （5） The results showed that the soil respiration of L. leueocephala （Lam.） de Wit decreased with the age of forest in the dry-hot valleys and explaining the variation of soil respiration in growth season by soil physical and chemical properties.
作者
崔羽
严思维
吴建召
罗清虎
林勇明
王道杰
CUI Yu;YAN Siwei;WU Jianzhao;LUO Qinghu;LING Yongming;WANG Daojie(College of Forestry,Fujian Agriculture and Forestry University,Fuzhou,Fujian,350002;Key Laboratory for Forest Ecosystem Process and Management of Fujian province,Fuzhou,Fujian,350002;Institute of Mountain Hazards and Environment,Chinese Academy of Sciences,Chengdu,Sichuan,640001)
出处
《武夷学院学报》
2018年第9期31-38,共8页
Journal of Wuyi University
基金
国家自然科学基金项目(41790434)
福建农林大学杰出青年科研人才计划项目(xjq201716)
福建农林大学科技创新专项基金项目(CXZX2017111
CXZX2017283)资助~~
关键词
银合欢
土壤呼吸
温度
水分
土壤理化性质
Leucaena leucocephala
soil respiration
temperature
moisture
soil physical and chemical properties
