油茶人工林土壤肥力及对树体生长的影响

Camelia oleifera Plantation Soil Fertility and Its Effect on the Tree Growth

对不同立地条件下油茶人工林的树高、地径及其土壤化学性质进行测定,并运用灰色关联分析方法探讨土壤化学性质对油茶高生长和地径生长的影响,综合评价油茶人工林土壤肥力状况。结果表明:9个样地中土壤肥力属于Ⅲ级(一般)的有5个,属于Ⅳ级(差)的有2个,属于Ⅴ级(极差)的有2个,说明9个油茶林地的土壤肥力普遍较低;而对油茶高生长影响最大的是土壤全K、全N和有效Zn,影响相对较小的是土壤有效P和交换性Ca;对油茶地径生长影响最大的是土壤有效Zn、全K和全N,影响相对较小的是土壤交换性Ca和pH值。

Tree height,base diameter and soil chemical characteristics were investigated under different stand conditions,the grey correlation analysis was used to study the effect of soil chemical characteristics on the tree height and base diameter,then gave a comprehensive evaluation about the soil fertility for Camelia oleifera plantation.The results showed that 5 plots were classed as Ⅲ(average),2 were classed as Ⅳ(poor)and 2 were classed as Ⅴ(worse).Which showed all 9 plantations were general in poor soil fertility level.And total K,total N and total P were the most important fertility indexes,while effective P and exchangeable Ca were the least important fertility indexes;effective Zn,total K,total N had the biggest effect on the growth of Camelia oleifera base diameter,exchangeable Ca and pH value had the relatively smaller effects