不同林龄柑橘园碳氮磷分配及生态化学计量特征研究  

Study on the Distribution of Carbon,Nitrogen and Phosphorus and the Ecological Stoichiometry in Citrus Plantation of Different Stand Age

作　　者：杨好运 贾国梅[1] 杜祥运 张宝林[1] 许文年[2] 

机构地区：[1]三峡大学生物与制药学院,湖北宜昌443002 [2]三峡大学三峡地区地质灾害与生态环境湖北省协同创新中心,湖北宜昌443002

出　　处：《湖北农业科学》2016年第6期1402-1405,共4页Hubei Agricultural Sciences

基　　金：国家自然科学基金项目(51278281)

摘　　要：选取了邻近的3种林龄(10、20和30年)的柑橘(Citrus reticulata Blanco.)凋落物和土壤作为研究对象,研究其碳氮磷化学生态计量特征,了解三峡库区柑橘园生态系统的碳氮磷分布格局及其生态化学计量特征。结果表明,碳氮磷含量均表现为凋落物<土壤。林龄对凋落物碳氮含量、凋落物C/N、土壤C/N和土壤C/P均无显著影响,但是对凋落物磷、土壤碳氮磷、凋落物C/P和N/P以及土壤N/P影响显著。随着柑橘林龄的增大,土壤碳氮磷含量和土壤N/P逐渐提高,而凋落物磷随着柑橘林龄的增大呈现出先提高,20年达到最大值,其后又降低的趋势,凋落物C/P和N/P呈现降低的趋势。In order to ascertain the distribution patterns of carbon,nitrogen and phosphorus and the ecological stoichiometry in citrus plantation, in this study,the litter and the soils were studied of three forests with near age（10 years, 20 years and 30 years） in citrus plantation of the Three Gorges Reservoir area. The resuhs showed that the eontent of carbon,nitrogen and phosphorus were in the order of litter 〈soil. It was showed that the age of stand had no significant impact on the content of carbon and nitrogen, C/N of the litter, C/N of soil and C/P of soil, while the P of the litter, the carbon, nitrogen and phosphorus of soil, C/P of the litter, N/P of the litter and N/P of soil werre significantly affected by the age of stand. With the increasing age of citrus plantation, soil carbon, nitrogen and phosphorus content and N/P was gradually increased.The phosphorus of litter was increased in the first 20 years,then it was decreased.The C/P and N/P of litter was decreased through the ground.

关 键 词：土壤 凋落物 生态化学计量 柑橘(Citrus RETICULATA Blanco.) 

分 类 号：S666.2[农业科学—果树学]