浙江安吉主要植被类型土壤抗蚀性研究

经因子分析,10个用于表征土壤抗蚀性的指标,可以简化为水稳性团粒因子、无机黏粒类因子两个相互独立的公因子。根据土壤抗蚀能力可以将8个样地分为3类。落阔林、灌木林、毛竹林为第一类,土壤抗蚀能力强。茶园、草地、常阔林、松林划为第二类,抗蚀性较强。而裸露地抗蚀性差,单独作为第三类。≤1 mm细根能有效提高土壤抗蚀性能。在表征根系的参数中,根体积更能映根系提高土壤抗蚀性能的效应。

Soil Anti-erodibility of the Main Forest Types in Anji County

Soil anti-erodibility of the main forest types in Anji County,Zhejiang Province is studied. It shows that all the 10 antierodibility indexes can be divided into 2 common factors that are inorganic clay factor and water-stable aggregate factor by means of Factor Analysis. All the 8 plots can be clustered into 3 kinds based on the soil anti-erodibility. Anti-erodibility of Deciduous broad-leaved forest,shrub community and Moso bamboo are the strongest, so these 3 plots are clustered into the first kind. The second kind with medium anti-erodibility is composed of tea garden, pinetum, evergreen broad-leaved forest and grass land, whereas the third kind with poor anti-erodibility is made up of only the bared-land. Roots less than 1 mm in diameter are the most effective in improving soil anti-erodibility. Among all the root indexes, root volume can reflect the effect on improving anti-erodibility very well.