不同强度间伐对辽东蒙古栎林及杂木林土壤理化性质的影响

Effects of Different Thinning Intensities on Physical and Chemical Properties of Soil in Quercus mongolica Plantation and Spinney in Eastern Liaoning Province

通过辽东蒙古栎林及杂木林实施不同强度的间伐试验,研究不同间伐强度对这2种林分土壤理化性质的影响。结果表明:对密度较大的蒙古栎林和杂木林进行适度间伐抚育,能显著地提高林地生物量,相应提高了凋落物归还于土壤的有机质,改善了土壤的物理性质和化学性质。物理性质的改善主要体现在土壤密度变小,总孔隙度、毛管孔隙度和非毛管孔隙度的增加;化学性质的改善主要表现在土壤有机质、全氮、速效性氮、磷和钾的养分含量提高。

Cutting experiments with different intensities on Quercus mongolica plantation and spinney were conducted.Effects of different thinning intensities on physical and chemical properties of soil in Quercus mongolica plantation and spinney in eastern Liaoning Province were studied.Result shows that moderate thinning tending on Quercus mongolica plantation and spinney can increase significantly the biomass of forestland,increase correspondingly organic matter which litter returned to soil,improve the physical and chemical properties of the soil.The improvements of soil physical properties were mainly showed on the less of soil dense,increase in total porosity,capillary porosity and non-capillary porosity.The improvement of chemical properties mainly showed increase of organic matter,total nitrogen,available nitrogen,phosphorus and potassium.