名山县不同土壤类型下有机碳组成和季节性变化研究

[目的]为西南地区茶园的合理施肥和管理方式提供科学依据.[方法]采用重铬酸钾容量法-外加热法,测定四川省名山县茶园3种土壤的有机碳组成.[结果]名山县茶园土壤有机质含量较低,为12.01 ～15.50g/kg.其中,腐殖酸总碳占有机质总碳的28.58％～34.30％,活性有机碳占总碳的41.67％ ～51.86％.[结论]对比春、夏、秋三季有机碳和其他形态碳,特点为总量随着季节波动,但波动幅度小,季节间差异不显著.

Study on Composition and Seasonal Dynamic of Organic Carbon in Different Soil Type of Mingshan County

[Objective] The research aimed to provide the scientific basis for reasonable fertilization and management in tea gardens.[Method] The organic matter content in three soil types from tea gardens in Mingshan County was determined by external heating method and potassium dichromate volumes.[Result]The organic matter content was low in Mingshan tea garden soils,ranging from 12.01 to 15.50 g/kg.The degree of humic acid in organic carbon ranged from 28.58％ to 34.30％,and the soil labile organic varied between 41.67％ and 51.86％.[Conclusion] The organic matter content fluctuated with season dynamics.By contrasting,the content oforganic carbon doesn＇t have significantly positive correlation with season dynamics.