五指山不同海拔高度的土壤化学性质特征

根据海南省五指山2003年土壤样品的分析结果,对不同海拔高度下五指山土壤的化学性质特征进行了分析。结果表明,在不同海拔高度下水提pH和盐提pH随采样深度的增加基本呈明显的增大趋势,交换性H 、CEC、全N和有机质随采样深度的增加基本呈明显的下降趋势;而交换性Al3 和交换性酸除在720m、894m处剖面外,其它海拔高度下也基本随采样深度的增加而明显降低。从化学过程较为活跃的表层土壤来看,水提pH、盐提pH、交换性H、交换性Al3 和交换性酸随海拔高度的增加并没有明显的同时增大或减小的分布规律,而CEC、全N和有机质有明显的增加趋势。

Characteristics of chemical properties of soil in Wuzhi Mountain at different altitudes in Hainan province

The soil chemical properties of Wuzhi Mountain in different altitudes were researched according to the analyzed results of the soil samples in 2003. The results indicated that with the increase of section depth of soil samples in the different altitudes, water extract pH and salt extract pH appeared remarkable increase. But with the increase of sections depth of soil samples, exchangeable hydrogen, CEC, total nitrogen and organic matters appeared obviously decreased, exchangeable aluminum and exchangeable acids were also according with this law except the section depth of soil of 720 m and 894 m. With the altitudes ascending, water extract pH, salt extract pH, exchangeable hydrogen, exchangeable aluminum and exchangeable acid did not obviously appeared the distributing law of simultaneous increase or decrease in the topsoil which chemical process is very active, but CEC, total nitrogen and organic matters appeared the trend of obvious increase.