海南4种典型林分土壤化学性质比较研究  

Comparisons of Soil Chemical Properties under Four Typical Forest Stands in Hainan Province

作　　者：王海燕[1] 雷相东[2] 陆元昌[2] 周燕华[3] 何楚林 

机构地区：[1]北京林业大学水土保持学院,教育部水土保持与荒漠化防治重点实验室,北京100083 [2]中国林业科学研究院资源信息研究所,北京100091 [3]海南省林业局,海南海口570203

出　　处：《林业科学研究》2009年第1期129-133,共5页Forest Research

基　　金：国家自然科学基金项目(编号30671679);国家"十一五"科技支撑课题(2006BAD03A04)

摘　　要：Soil samples were collected from primary forest,natural secondary forest,Pinus caribaea and Acacia mangium stands in Baisha County,Hainan Province,for the determination of soil chemical properties including soil pH,organic matter,total and available N,P and K.The effects of soil layers and forest stands on soil chemical properties were compared.Results showed that forest soils in the studied area were strong acidic,with slight or moderate deficiency of available P,and moderate deficiency of available K(except the primary forest).The highest contents of soil total and available nutrients except for available P and total K were found in the primary forest,followed by natural secondary forest and Acacia mangium stands,and the lowest in Pinus caribaea stands.In soil layer A,except for total N and available P,significant differences were found for organic matter content and very significant differences for soil pH,hydrolyzable N,total P,and total and available K among the four types of forest stand.Similar trend was true for soil layer B.Correlation analysis indicated that soil organic matter content affected the total and available N,P and K in different manner.Soil organic matter had very significant or significant correlation with total N,and significant correlation with hydrolyzable N(only in soil layer B) in primary and natural secondary forests.Significant correlations beween organic matter and total N and P were found in Pinus caribaea stands,but no significant correlations between organic matter and soil nutrients existed in Acacia mangium stands.Some suggestions on forest management were also proposed to improve forest soil quality.Soil samples were collected from primary mangium stands in Baisha County, Hainan Province, forest, natural secondary forest, Pinus caribaea and Acacia for the determination of soil chemical properties including soil pH, organic matter, total and available N, P and K. The effects of soil layers and forest stands on soil chemical properties were compared. Results showed that forest soils in the studied area were strong acidic, with slight or moderate deficiency of available P, and moderate deficiency of available K （ except the primary forest）. The highest contents of soil total and available nutrients except for available P and total K were found in the primary forest, followed by natural secondary forest and Acacia mangium stands, and the lowest in Pinus caribaea stands. In soil layer A, except for total N and available P, significant differences were found for organic matter content and very significant differences for soil pH, hydrolyzable N, total P, and total and available K among the four types of forest stand. Similar trend was true for soil layer B. Correlation analysis indicated that soil organic matter content affected the total and available N, P and K in different manner. Soil organic matter had very significant or significant correlation with total N, and significant correlation with hydrolyzable N （only in soil layer B） in primary and natural secondary forests. Significant correlations beween organic matter and total N and P were found in Pinus caribaea stands, but no significant correlations between organic matter and soil nutrients existed in Acacia mangium stands. Some suggestions on forest management were also proposed to improve forest soil quality.

关 键 词：原始林 天然次生林 人工林 森林土壤 土壤化学性质 土壤肥力 

分 类 号：S714[农业科学—林学]