Analysis of soil anti-erodibility of five different plantation lands in Zhongyang, Shanxi | 山西中阳5种人工林地土壤的抗蚀性研究

Chinese. 分析晋西黄土丘陵区主要人工林地土壤的抗蚀性及其影响因素，为该地人工林建设过程中树种的搭配提供依据。选择山西中阳县车鸣峪林场神疙瘩管护站的5种人工林地为研究对象,取样测定其土壤的基本理化性质及土壤抗蚀性指数,并分析了5种人工林地土壤抗蚀性及其与土壤理化性质的关系。不同种类人工林的土壤抗蚀性有差异，土壤抗蚀性指数表现为刺槐油松榆树混交林＞油松林＞侧柏林＞刺槐林＞灌木林，不同土层的土壤抗蚀性指数也有区别，表现为0~20 cm土层大于20~40 cm土层。土壤抗蚀性指数随着时间的增加而降低，且二者间呈三次函数关系，其中20~40 cm土层土壤抗蚀性指数下降幅度更大。土壤抗蚀性指数与粒径＞0.25 mm土壤水稳性团聚体、土壤粘粒（粒径＜0.001 mm）和有机质含量呈显著正相关，其与土壤基本物理性质和化学性质存在一定的线性关系，土壤抗蚀性受土壤基本物理性质的影响较大。不同人工林地土壤抗蚀性差异较大；为减轻土壤侵蚀，应当营造混交林，保护表层土壤。

English. Analysis was made on the major plantation corrosion resistance and its influencing factors in hilly-gully loess area of west Shanxi to provide the basis for species with the plantation of the construction process. Based on the experiments of dispersion of particals in water, soil anti-erodibility of five different plantation lands in Shanxi Zhongyang was studied, and also the relationship between soil anti-erodibility and soil physical and chemical characteristics was discussed. There is evident difference in anti-erodibility of plantation lands: soil anti-erosion indices are put in order as follows: Leguminosae×Pinaceae×Ulmacea＞Pinaceae＞Cupressaceae＞Shrubbery. The soil anti-erodibility indices of upper 20 cm are bigger than those under 20 cm. The soil anti-erodibility indices are getting lower and lower as time goes on. The relationship between soil anti-erodibility indices and times is cubic function. There is close liner relationship between soil anti-erodibility indices and soil properties. The amount of water-stable aggregates(＞0.25 mm), soil clay(＜0.001 mm) and organic matter is significantly related to soil anti-erodibiliy. Different plantation soil anti-erodibility is quite different and in order to reduce soil erosion, we should create mixed forest and protect the topsoil.