莲花山白盆珠自然保护区 3 种森林土壤养分含量比较

以莲花山白盘珠自然保护区针阔混交林、季风常绿阔叶林和山地常绿阔叶林表层土壤（0~20 cm）为对象，测定了土壤pH 值及主要养分含量，并应用相关分析法，探究了不同养分间的相关性。结 果表明：（1）山地常绿阔叶林土壤pH 值显著低于针阔混交林和季风常绿阔叶林；（2）森林土壤有机质、 全氮（N）、全磷（P）、速效N、有效P 含量在不同森林类型间差异显著：山地常绿阔叶林土壤有机质、 全 N、全P 显著高于针阔混交林和季风常绿阔叶林；针阔混交林土壤速效 N 含量最高，但有效 P 含量最 低；（ 3）3 种森林土壤全N 与全P 含量均存在极显著相关性，但其它养分间的相关性随森林类型而异， 表明森林类型对土壤养分的影响既有普遍性，又有特异性。

Soil Nutrients of Three Forest Types at Lianhuashan Baipanzhu Natural Reserve

The pH values and nutrients in the surface soil (0-20 cm depth) of three forest types (coniferbroadleaf mixed forest, monsoon evergreen broadleaf forest and montane evergreen broadleaf forest) at Lianhuashan Baipanzhu nature reserve were analyzed. The correlations among the nutrients of the soils were also detected. The results showed that: (1) The surface soils of the montane evergreen broadleaf forest were signi?cantly lower than those of the conifer-broadleaf mixed forest and the monsoon evergreen broadleaf forest; (2) The soil organic matter (SOM), total N and P, available N and available P showed significant differences depending on the forest types. The soils of monsoon evergreen broadleaf forest had the highest SOM, total N, and total P in comparison to the conifer-broadleaf mixed forest and the monsoon evergreen broadleaf forest. The conifer-broadleaf mixed forest had the highest available N but the lowest available P contents in the soils among the three forest types; (3) The total N was signi?cantly related to the total P in the three forest soils. The correlations among other nutrients in the soils varied with forest type, implying the universe and the specific effects of forest type on soil nutrients.