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以辽东山区日本落叶松(Larix kaempferi)人工林为研究对象,采集不同间伐强度(对照、20%、30%和40%)落叶松林的0~10 cm(表层)和10~20 cm(下层)土壤,研究不同间伐强度处理5年后落叶松林土壤理化性质的变化特征。结果表明,间伐5年后,各间伐强度落叶松林土壤容重、总孔隙度、毛管孔隙度、全碳、全氮、C∶N、N∶P以及NO3--N含量与对照之间差异性均不显著,但高强度间伐(40%强度)处理的落叶松林表层土壤田间持水量、全碳、全氮、N∶P及活性碳含量显著高于中度和强度间伐处理,且高强度间伐处理更有利于大径材培育。因此,对于辽东山区日本落叶松人工林经营管理,其间伐强度为40%时更合理。
Taking Larix kaempferi plantations in the mountainous area of eastern Liaoning as the research object, 0-10 cm (surface layer) and 10-20 cm (lower layer) layers of Larix kaempferi plantation with different thinning intensities (control, 20%, 30% and 40% Soil, the change characteristics of soil physical and chemical properties of Larix gmelinii forest five years after different thinning intensities were treated. The results showed that after 5 years of thinning, the differences of soil bulk density, total porosity, capillary porosity, total carbon, total nitrogen, C: N, N:P and NO3 - N between the control and the control (P> 0.05). However, the field water holding capacity, total carbon, total nitrogen, N:P and activated carbon contents in surface soil of high density thinning (40% intensity) treatment were significantly higher than those of middle and intensive thinning, More conducive to big diameter wood cultivation. Therefore, it is more reasonable for the management of Larix kaempferi plantation in the mountainous area of eastern Liaoning to have a thinning intensity of 40%.