Evaluation on soil fertility of Aquilaria sinensis plantations in Hainan Province
Abstract
The study taked Aquilaria sinensis plantations as the research objects and measured their soil chemical characteristics. A grey correlation analysis was used to evaluate the soil fertility status. The results showed that all sites were acidic soil and less fertile with the low organic matter,available K,available Zn and available Cu content. Available N in all the sites except Tuncheng Town in Tunchang County and Longzhou base of Dingan County was of medium level or above. Available P except Longzhou base of Dingan County was gravely insufficient. All the sites were lack of Available Ca and Available Mg,but were rich in Available Mn and Available Fe. Comprehensive fertility evaluation results showed that soil fertility of six types of plantions followed an order of Longzhou base of Dingan County Xinglong Town in Wanning City Nankun Town in Tunchang County Jinjiang Farm in Baoting County Poxin Town in Tunchang County Tuncheng Town in Tunchang County. Four plots were classed as Ⅲ(average),one plot was classed as Ⅳ(poor) and the other one was classed as Ⅴ(worse). The soil of Longzhou base of Dingan County was the most fertile,and the soil fertility of Tuncheng Town in Tunchang County was the poorest.