论文部分内容阅读
以天宝岩长苞铁杉林的倒木-土壤系统为研究对象,采用因子分析方法与模糊评价方法,探讨分析倒木接触处土壤及空旷处土壤的肥力质量.结果表明:研究区长苞铁杉林分内倒木的覆盖有利于提高土壤肥力,其肥力指数随海拔降低呈下降趋势,且随腐烂等级的升高,土壤肥力指数升高,其中,第Ⅳ腐烂等级倒木接触处土壤肥力较邻近腐烂等级出现降低趋势;长苞铁杉+猴头杜鹃林内倒木接触处土壤的肥力显著高于空旷地,长苞铁杉纯林内倒木接触处土壤的肥力指数低于空旷地土壤.研究揭示了倒木存在对森林土壤肥力质量的影响规律,可为后期在长苞铁杉林内开展倒木更新研究时的倒木选择与保留提供科学依据.
Taking the inverted wood-soil system of Tsuga crassipes as the research object, the factor analysis method and fuzzy evaluation method were used to analyze the fertility quality of the soil in the contact area and open space of the fallen tree. The results showed that: The coverage of fallen wood was beneficial to increase soil fertility. The index of fertility decreased with altitude, and the soil fertility index increased with the increase of decay level. Soil fertility of fallen wood at grade IV declined more than that of adjacent decay The trend of soil fertility of T. crassiciformes + Rhododendron simiarum was significantly higher than that of the open area, and the fertility index of the soil at the contact point of T. chinensis forest was lower than that of the open soil. Fertility quality of the law can provide the scientific basis for the late selection and retention of fallen wood in the researches on the inverted wood in the seedling of Sugarca sinensis.