Distribution Characteristics of Organic Carbon in Soil Aggregates from Different Tea Plantations

A combined method of field investigation and laboratory analysis was conducted to study the distribution features of organic carbon in soil aggregates from different tea plantations(yellow soil, red earth, moisture sandy soil, alpine meadow soil and purple soil) in Wuyishan City. The results showed that a depth-dependent manner was found in 5 soil aggregates with the content of organic carbon decreasing higher at 0 ~ 20 cm and less at 20 ~ 40 cm. There was a positive correlation between the contents of organic carbon and particle sizes of soil aggregate and most was exhibited at 5 mm in 5 tea plantation soils. The storage and distribution ratios of organic carbon were the highest while particle size of soil aggregates 5 mm in yellow soil, alpine meadow soil and purple soil, and 0.25 mm in moisture sandy soil, respectively. From the results, the contents of organic carbon in soil have an extremely significant positive correlation with its aggregates.