长白山林区不同森林类型下土壤肥力状况的研究

对长白山林区4种不同森林类型下的土壤肥力进行了研究.结果表明:①连栽落叶松林地有25cm厚的枯枝落叶层,且有15cm厚的部分完全分解,A层的有机质和多酚氧化酶含量最高,B层各项肥力指标均较低;②云冷杉林的枯枝落叶层的厚度和分解状况优于落叶松纯林,且有机质、全氮、速效磷含量高;③天然云冷杉林的微生物总量大于次生云冷杉林;④多酚氧化酶与有机质和全N的相关系数分别为0.9680和0.9737.

Soil Fertility of Different Forest Types in the Changbai Mountains

The forest soil fertilities in four different forest types were studied. The results have demonstrated that, ①the litter layer under the repeated plantation of Larix olgensis Henry was 25 cm, and the completely decomposited part was 15 cm. The organic matter content and polyphenol oxidase in humus horizon were the highest, but each factor of soil fertility in illuvial layer was almost the lowest. ②The thickness of the litter layer under spruce fir was greater,the decomposition intensity was bigger, and the organic matter, total nitrogen, available phosphorus were higher,comparing with that under the pure Larix forest. ③The microorganism number under the natural spruce fir forest was bigger than the secondary. ④The coefficients of correlation between the polyphenol oxidase and organic matter was 0.968 0, the total N was 0.973 7.