水土保持学报2017，Vol.31Issue(6)：183-188,6.DOI:10.13870/j.cnki.stbcxb.2017.06.030
不同发育阶段杉木人工林土壤团聚体分布特征及其稳定性研究
Study on Distribution Characteristics and Stability of Soil Aggregate in Chinese Fir Plantation at Different Developmental Stages
摘要
Abstract
In order to investigate the composition and stability of soil aggregates and explore the soil structure of Chinese fir plantation,in this study,0-100 cm soil layers of Chinese fir plantation in different developmental stages were taken as the object,dry sieving was used to determine composition of soil aggregates and wet sieving was used to determine the stability of aggregates.The results showed that under the dry sieve treatment,the soil aggregates of the Chinese fir plantations were dominated by macroaggregates (＞0.25 mm) at each developmental stage,which was above 80％,and the proportion of soil macroaggregates in middle age forest and mature forest was higher than that of young forest in each soil layer,it had significant difference in 0-20 cm soil layers;In each soil layer,for the soil aggregates with clay diameter ＞5 mm,which had a higher proportion and had a significant effect on the composition of soil aggregates with the different developmental stages of Chinese fir.Under the wet sieve treatment,the proportion of water stable macromolecule (＞0.25 mm) was significantly decreased with the increase of soil layer in each developmental stage,for the 0-80 cm soil layers,the proportion of water stable macromolecule of middle age and mature forest was higher than young forest,for the 0-20 cm and 20-40 cm soil layer,the proportion of water stable macromolecule of middle age forest were 41.79％ and 39.06％ higher than that of the young forest,which had significant difference;The PAD characteristics of soil aggregates displayed an opposite trend as compare to water stable macromolecules in each developmental stage of Chinese fir plantation,MWD and GMD decreased significantly with the increase of soil layer,and the GMD of soil aggregate in middle age forest and mature forest were significantly higher than those of young forest in 0-100 cm soil layers.Therefore,the stability of soil aggregates in Chinese fir plantation decreased with the increase of soil layer,and the soil structure of middle age forest and mature forest was better than that of young forest.关键词
人工林/杉木/土壤团聚体/稳定性Key words
plantation/Chinese fir/soil aggregate/stability分类
农业科技引用本文复制引用
庄正,张芸,张颖,李艳娟,高文杰,刘爱琴..不同发育阶段杉木人工林土壤团聚体分布特征及其稳定性研究[J].水土保持学报,2017,31(6):183-188,6.基金项目
国家重点研发计划项目(2016YFD0600301) （2016YFD0600301）
福建农林大学科技创新专项(KF2015034) （KF2015034）
