Effect of Planting-year of Tea on Soil Organic-mineral Complex Status
The soil organic-mineral complex status and humus combined forms in tea garden of different planting-year were studied.The results showed that the content of soil organic carbon,content of heavy soil organic carbon and soil organic-mineral complex quantity were increased obviously with planting-year increasing and the degree of soil organic-mineral complex was decreased.This result was consistent with the source of soil organic matter and differences of mobility.After planting tea in natural soil,the contents of all combined forms humus were increased obviously,and the order of their absolute contents was： tightly combined humusloosely combined humusstable combined humus.The loosely and tightly combined humus accounted for most of organic matter in complex.Following the increment of tea planting-year,the ratio of loosely to tightly combined humus and the relative content of loosely combined humus were increased while the relative content of tightly combined humus was decreased.Correlation analysis showed that soil organic-mineral complex status and humus combined pattern were positively correlated with soil fertility,so they could be used as index to mark soil fertility.
万方数据
