Roles of Different species tree plantation in remidiation of degraded soils on sloping lands II. Soil fertility

Abstract

This experiment was a study on changes soil fertility in three sloping lands which were changed inland use from sugarcane growing to various species tree plantation for three years. There were found that amount(N, P,K) and soil cation exchanges capacity (CEC) in the three sloping lands were substantially reduced afterplowing the land for tree growing (start of experiment). But after the tree started growing such soil properties whichare some indicators of soil fertility were gradually increased and when the tree plantation were 36 months old (end ofexperiment) the amount of soil fertility indicators were somewhat higher than those at the start of experiment . In thisexperiment, the middle sloping land (3.0-3.5%) had a tendency to be more efficient than the upper sloping land(3.5 - 4.0%) or lower sloping land (2.5 - 3.0%) in increasing soil fertility resulted from the changing of land use.