樟子松不同林型沙地土壤肥力的差异

对辽宁省章古台地区樟子松林沙地土壤的物理性质、养分及微生物状况等进行了研究,并分析了樟子松纯林与不同类型樟子松混交林土壤肥力的差异。选择土壤含水率、体积质量、最大持水量、毛管孔隙度、有机质、全氮、水解氮、全磷、速效磷、速效钾、微生物总量共11个指标,对不同林分类型的土壤效益进行了综合评价。结果显示,混交林土壤肥力均优于纯林。

Differences in Sand Soil between Different Forest Types of Pinus sylvestris var. mongolica

An experiment was conducted to study the physical property, nutrient content and microorganism of sand soil in Pinus sylvestris var. mongolica forests in Zhanggutai, Liaoning Province. Differences in soil fertility between the pure forests and different types of mixed forests were analysed. The soil benefits of different forest types were synthetically evaluated by means of 11 factors, namely, soil moisture content, bulk density, the maximum water holding capacity, capillary porosity, quantity of microorganisms, as well as contents of organic matter, total N, hydrolytic N, total P, available P and available K. Result showed that the soil fertility of the mixed forests is better than that of the pure forests.