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WuYan,MoYunbao,YixiaoQing,XiaoShihong,GaoChangjun,WeiLong,CaiJian,XuFang,PanWen
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Grey correlative degree analysis of soil fertility of Castanopsis hystrix and Pinus elliottii plantations in South Subtropics
Wu Yan,Mo Yunbao,Yixiao Qing,Xiao Shihong,Gao Changjun,Wei Long,Cai Jian,Xu Fang,Pan Wen
(Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization / Guangdong Academy of Forestry;Guangdong Province Forestry Technology Extension Station)
Abstract:
To determine the soil fertility of pure Casta_x0002_nopsis hystrix forest, C. hystrix-Pinus elliottii mixed forest and pure P. elliottii forest in the south subtropical area, soil pH values, organic matter, total N, total phosphate, total K, hydrolysable N, available phosphate, and available K were used as evaluation index. Soil fertility was analyzed by grey correlative degree analysis and ranked by collelation degree comprehensively. The results indicated that the contents of organic matter, total N, hydrolysable N, available phosphate and available K had decline tendency with the increase of soil layer depth, while pH value, the content of total phosphate and total K have no difference in five different soil layers. The grey correlative degree analysis shows the best soil fertility was observed in pure C. hystrix forest, followed by C. hystrix-P. elliottii mixed forest, and pure P. elliottii forest has poorest soil fertility status.
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