沿海破坏山体周边不同植被恢复模式土壤结构特征与健康评价

Soil structure characteristics and health evaluation of different revegetation types around the coastal damaged mountain

采用萨维诺夫干筛法和主成分分析法研究烟台市黄务镇峰山破坏山体周边7种植被恢复模式的土壤结构特征。结果表明:所有人工植被恢复模式的土壤密度均显著低于灌草丛,其中麻栎黑松混交林最小;植被恢复模式对土壤孔隙的改善作用表现为混交林(纯林(灌草丛,0～10 cm土层优于10～20 cm土层;所有人工植被恢复模式的土壤储水能力和土壤团聚体平均质量直径均高于灌草丛,其中麻栎黑松混交林最好。对土壤结构健康综合评价结果表明,土壤结构以灌草丛最差,麻栎黑松混交林最好,其他人工植被恢复模式介于二者之间。研究结果可为同类破坏山体周边的植被恢复与重建提供参考。

The soil structure characteristics were studied on seven revegetation types by using dry sieving and principal component analysis （PCA） in Huangwu County, Yantai City, Shandong Province. The results show that the soil densities of artificial revegetation were significantly lower than that of mature brushwood,among which, that of Quercus acutissima and Pinus thunbergii mixed forest was the lowest. The discending order of effects of soil porosity improved by plantations is： mixed forests, pure forests, brushwood. The soil porosities in 0 - 10 cm layer were largger than that of 10 - 20 cm. Soil water carrying capacities and its average mass diameters of soil aggregate of plantations were all higher than that of brushwood. Among these revegetations, the improved soil porosity of Quercus acutissima and Pinus thunbergii mixed forest was the best. Comprehensive evaluations of soil structure health indicate that the health of brushwood was the worst, that of Quercus acutissima and Pinus thunbergii mixed forest was the best. The results can provide scientific references for revegetations in the similar damaged mountain area.