【作者】 高志勤； 傅懋毅；

【Author】 GAO Zhi-qin, FU Mao-yi(Ningbo City Professional Technology College, Ningbo 315211, Zhejiang, China; The Research Institute of Subtropical Forestry, CAF, Fuyang 311400, Zhejiang, China)

【机构】 宁波城市职业技术学院； 中国林业科学研究院亚热带林业研究所；

【摘要】 运用定位研究法揭示了不同结构和耕作方式毛竹林土壤全氮和有机碳含量的季节变化和空间分异特征,结果显示:垦复毛竹纯林三个土壤层次全氮含量最低值都出现在春季(3月份),层次Ⅰ(0～10cm)最高含量出现在秋季,层次Ⅱ(10～30cm)和层次Ⅲ(30～50cm)全氮含量最高值出现在夏季(7月份)。垦复毛竹纯林层次Ⅰ(0～10cm)四季土壤有机碳含量均高于相应时期的未垦复毛竹纯林,也高于毛竹木荷青冈混交林(秋季和冬季例外),毛竹纯林土壤有机碳含量几乎高出茶园1.1倍。垦复毛竹纯林层次Ⅱ(10～30cm)有机碳含量高低季节序列为:秋季>冬季>夏季>春季,未垦复毛竹纯林有机碳含量低于垦复毛竹纯林1.0～1.3%个单位(春季例外),含量高低季节序列为:春季>冬季>秋季>夏季,毛竹木荷青冈混交林土壤有机碳含量高低季节序列:冬季>夏季>秋季>春季。垦复毛竹纯林层次Ⅲ(30～50cm)含量高低季节序列:夏季>秋季>春季>冬季,朱垦复毛竹纯林有机碳含量除春季外,其余三个季节均比垦复毛竹纯林低。毛竹木荷青冈混交林层次Ⅲ(30～50cm)土壤有机碳含量发生明显变化的时期在夏秋时节。春季垦复毛竹纯林层次Ⅰ(0-10cm)有机质C/N比值极显著高于其它三个季节,同时也高于未垦复毛竹纯林、毛竹木荷青冈混交林和茶园,各林地土壤有机质C/N比值介于10.5～18.5之间。全氮和有机碳含量季节之间虽然存在差异但未达到显著水平,然而林分之间有机碳含量差异却达到极显著水平。更多还原

【Abstract】 This paper dealt with a study on the characteristics of seasonal variation and spatial distribution of total nitrogen and organic carbon content under different structure and cultivated manner of Phyllostachys pubescens stands adopting ecological situated observation in Fu yang and Feng hua county, Zhejiang province. It turned out that the lowest soil total nitrogen content of three layers of reclamation pure Phyllostachys pubescens stands occured in spring (March), whereas the highest content of layer Ⅰ (0-10cm) occured in autumn while the highest content of layer Ⅱ (10-30cm) and layerⅢ(30-50cm) occured in summer(July).It is bigger than non- reclamation pure Phyllostachys pubescens stands for soil organic carbon content of layer Ⅰ (0-10cm) at the same periods in different seasons, It also bigger than the content of mixed Phyllostachys pubescens with Schima superba and Cyclobalanopsis glauca forest stands except for autumn and winter, It is nearly more 1.1 times than Camellia sinensis plantation stands for soil organic carbon content. The order of soil organic carbon content of layer Ⅱ (10-30cm) in terms of seasons under reclamation pure Phyllostachys pubescens stands was as follow: autumn>winter>summer>spring, While it was lower 1.0-1.3% unit than reclamation pure Phyllostachys pubescens stands for soil organic carbon content of non reclamation pure Phyllostachys pubescens stands except for spring. The content order was as follow: spring>winter>autumn>summer, Whereas mixed Phyllostachys pubescens with Schima superba and Cyclobalanopsis glauca stands appeared: winter>summer>autumn>spring. The order of soil organic carbon content of layerⅢ(30-50cm) in terms of seasons under reclamation pure Phyllostachys pubescens stands was as follow: summer> autumn>spring> winter, Soil organic carbon content of non rehabilitation pure Phyllostachys pubescens stands was lower than reclamation’s in different seasons except for spring, Meanwhile the soil organic carbon content of layerⅢ(30-50cm) occurred significant change at link up periods of summer and autumn under mixed Phyllostachys pubescens with Schima superba and Cyclobalanopsis glauca forest stands.It was more significant bigger than other seasons for C/N ratio values of soil organic matter of layer Ⅰ (0-10cm) under reclamation pure Phyllostachys pubescens stands in spring, In the meantime it was bigger than that non rehabilitation pure Phyllostachys pubescens stands and mixed Phyllostachys pubescens with Schima superba and Cyclobalanopsis glauca stands and Camellia sinensis plantation stands, The values of C/N ratio range from 10.5 to 18.5 of experimental stands. Although it was existed difference for soil total nitrogen and organic carbon content of experimental stands in various seasons, It wasn’t reached significant difference levels, However the difference of soil organic carbon content among experimental stands reached more significant levels.更多还原