亚热带常绿阔叶林迹地不同森林经营类型对土壤肥力的影响

EFFECT OF DIFFERENT MANAGEMENT ON SOIL FERTILITY IN THE SLASH OF EVERGREEN BROADLEAVED FOREST IN SUBTROPIC

常绿阔叶林迹地经营不同人工林类型使土壤容重增加了0.06～0.31g／cm3，土壤毛管孔限度、非毛管孔隙度、总孔限度分别降低了4.59～7.21百分点、3.95～10.98百分点、11.54～16.32百分点。6种森林类型土壤腐殖质、全N、全P含量均为A层高于B层，其中土壤腐殖质、全N平均含量顺序为:木荷与杉木混交＞鹅掌楸与杉木混交＞常绿阔叶林＞杉木＞鹅掌楸＞马尾松。土壤腐殖质与土壤全队总酚含量之间，全N与总酚含量之间相关系数分别为0.990、0.892、0.883，达权显著相关。6种森林类型中除马尾松林地土壤腐殖质HA／FA＜1外，其余5种森林土壤均为HA／FA＞1。木荷与杉木混交、鹅掌楸与杉木混交林土壤肥力明显好于单一树种栽培，而且有效地抑制了土壤多酚氧化酶活性。

Different plantation management in the slash of evergreen broad -leaved forests results in the increase of soil volume weight 0. O6～ 0. 31g / cm3 and the decrease of soil capillary porosity 3. 95%～10. 98%, soil uncapillary 4. 59%～7. 21% and soil total porosity 11. 54%～16. 32%. The content of humus, total nitrogen and total potassium of A horizon are higher than that of B horizon in the soil of six plantation types. The order of average content of humus and total nitrogen of soil is in schima- chinese fir mixed forest> in Chinese Tuliptree-chinese fir mixed forest>in everyreen broadleaved forest> in Chinese forest> ln Chinese Tuliptree> in Masson pine. The correlation coefficient of soil humus and total nitrogeri, soil humus and total phenol, total nitrogen and total phenol is 0. 990, 0. 829 and 0. 883 respectively,showing close relationship. The ratio of humid acid and fulvie acid (HA/FA) of soil is less than 1 in Masson pine forest and more than 1 in the other five forest,Fertility of soil in schima- chinese fir mixed forest and Chinese Tuliptree-Chinese fir mixed forest is better than that in pure Chinese fir forest, and also have an obvious inhibition to polyphony oxides activity of soil.