内蒙古敖汉旗人工林地土壤特性分析

Analysis of Soil Characteristics of Artificial Forest Land in Aohan County of Inner Mongolia

以内蒙古赤峰市敖汉旗典型半干旱农牧交错带为例,选择小叶杨纯林、樟子松纯林、柠条纯林、小叶杨+山杏混交林、小叶杨+樟子松混交林和荒草地6种立地类型,对其在风沙土和栗钙土中的土壤特性进行了研究。结果表明,不同植被条件下的土壤物理性质有明显差异:土壤容重表现为:小叶杨纯林>樟子松纯林>小叶杨+樟子松混交林>小叶杨+山杏混交林>柠条纯林>荒草地;土壤含水量、孔隙度和有机质含量则表现为:荒草地>柠条纯林>小叶杨+山杏混交林>小叶杨+樟子松混交林>樟子松纯林>小叶杨纯林。在垂直剖面上,随土层深度的增加,各种生态群落条件下的土壤容重逐渐增加,而土壤含水量、孔隙度和有机质呈逐渐减少的趋势。

Taking the typical semiarid farming-pasture region of Aohan county in Chifeng city of Inner Mongolia as example,the soil characteristics of sandy soil and chestnut soil of 6 site types were studied,including pure Populus simonii forest,pure Pinus sylvestris forest,pure Caragang korshinskii forest,mixed forest of Populus simonii＋ Prunus ansu,mixed forest of Populus simonii＋ Pinus sylvestris,and barren grassland.The results showed that the soil physical properties of different vegetation types were obviously different.The exhibition of soil volume weight was： pure Populus simonii forest pure Pinus sylvestris forest mixed forest of Populus simonii＋ Pinus sylvestris mixed forest of Populus simonii＋ Prunus ansu pure Caragang korshinskii forest barren grassland.The soil moisture content,porosity and content of organic matter had the following order： barren grassland pure Caragang korshinskii forest mixed forest of Populus simonii＋ Prunus ansu mixed forest of Populus simonii＋ Pinus sylvestris pure Pinus sylvestris forest pure Populus simonii forest.In vertical section,the soil volume weight in all kinds of forest lands gradually increased with the increase of soil depth,while the soil moisture content,porosity and organic matter content presented the trend of gradual decrease.