应用定位研究法探明位于浙江省富阳市春建乡不同结构毛竹Phyllostachys pubescens林土壤0~10,10~30和30~50 cm等3个层次有机碳和全氮质量分数的季节变化特征。结果表明,垦复毛竹纯林土壤有机碳质量分数的季节变化(12.9~38.9 g.kg-1)秋冬高于春夏,而未垦复毛竹纯林却与之相反,即春夏高于秋冬季节,变幅为7.5~31.2 g.kg-1;毛竹与木荷Schima superba混交林土壤有机碳质量分数(7.5~40.2 g.kg-1)冬季最高春季最低,表现出与毛竹纯林不同的变化特征。垦复毛竹纯林土壤全氮质量分数(0.8~2.4 g.kg-1)夏季最高春季最低,未垦复毛竹纯林却是春季最高秋季最低,土壤全氮质量分数变幅为1.3~3.0 g.kg-1;而毛竹木荷混交林是夏季最高秋季最低,土壤全氮质量分数变幅为(0.9~3.2 g.kg-1)。垦复毛竹纯林土壤有机质碳氮比(C/N)范围为8.49~46.03,未垦复毛竹纯林C/N比范围为5.84~11.99;毛竹木荷混交林C/N比范围为3.43~15.02。方差分析表明,土壤全氮质量分数不同毛竹林分之间差异不显著,春季和夏季之间差异显著。秋季和冬季之间差异不显著,0~10与30~50 cm层次之间全氮质量分数差异极显著,而0~10 cm与10~30 cm层次之间差异显著。土壤有机碳质量分数不同季节或林分之间差异不显著,3类林分的0~10,10~30和30~50 cm等3个层次之间的平均有机碳质量分数差异极显著。因此,不同结构和经营状态毛竹林土壤碳氮养分在季节序列和土壤层次上存在较大变异。表4参16 The seasonal variation characteristics of organic carbon and total nitrogen in three levels of 0 ~ 10, 10 ~ 30 and 30 ~ 50 cm in Phyllostachys pubescens forest with different structures in Chunjian Township, Fuyang City, Zhejiang Province were investigated using the method of Positioning Study. The results showed that the seasonal variation of soil organic carbon mass fraction in cultivated Phyllostachys heterocycla cv. Pubescens forest was higher than that in spring and summer, while the uncultivated Phyllostachys pubescens pure forest was the contrary, that is, the spring-summer was higher than the autumn and winter (7.5 ~ 31.2 g.kg-1) in winter and lowest in spring, the soil organic carbon content (7.5-40.2 g.kg-1) in Moso bamboo and Schima superba mixed forest showed the lowest in winter Change characteristics. The pure soil of cultivated Phyllostachys pubescens soil had the lowest content of total nitrogen (0.8-2.4 g.kg-1) in spring, the lowest in spring, and the range of soil total nitrogen was 1.3-3.0 g .kg-1. However, the mixed forest of Phyllostachys pubescens and Moso bamboo possessed the highest lowest in summer and the soil total nitrogen content ranged from 0.9 to 3.2 g · kg-1. The C / N ratio ranged from 8.49 to 46.03, and the range of C / N ratio ranged from 5.84 to 11.99 for uncultivated Phyllostachys pubescens pure forest. The range of C / N ratio was 3.43 ~ 15.02. Analysis of variance showed that there was no significant difference in the total nitrogen content of soil between different stands of Moso bamboo, and there was a significant difference between spring and summer. The difference between autumn and winter was not significant. The difference of total nitrogen content between 0 ~ 10 and 30 ~ 50 cm was significant, while there was significant difference between 0 ~ 10 cm and 10 ~ 30 cm. The difference of soil organic carbon mass fraction in different seasons or stand was insignificant. The difference of average organic carbon mass fraction in three levels of 0 ~ 10, 10 ~ 30 and 30 ~ 50 cm of the three types of forest was significant. Therefore, there is a great variation of soil carbon and nitrogen nutrients in different structure and management status in seasonal sequence and soil layer. Table 4 Reference 16