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以吉林蛟河针阔混交红松林监测样地作为研究对象,对春榆混交林、白牛槭混交林、千金榆混交林和色木槭混交林四种林分进行林分结构调查与土壤采样,并测定土壤有机碳及养分含量,分析了不同林分类型对土壤有机碳积累的影响及土壤养分与有机碳相关性的差异。结果表明:1)该研究区四种林分土壤有机碳密度千金榆混交林(18.21kg·m-2)>春榆混交林(16.16kg·m-2)>白牛槭混交林(15.75kg·m-2)>色木槭混交林(14.23kg·m-2)。2)四种林分土壤有机碳含量及密度的变异程度规律基本遵循春榆混交林>白牛槭混交林>千金榆混交林>色木槭混交林。3)四种林分的土壤有机碳与养分的相关性规律不尽相同,全磷与千金榆、春榆混交林土壤有机碳相关性显著,速效钾只与千金榆混交林土壤有机碳具有相关性,土壤全氮和碱解氮与四种林分土壤有机碳的相关性均显著。相关分析结果说明四种林分类型土壤有机碳与土壤养分状况密切相关。
Taking the mixed forest of Pinus koraiensis and Pinus koraiensis in Jiaohe of Jilin as the research object, the forest stand structure investigation and soil sampling were carried out on the four stands of mixed forest of Spring Elm, Mixed Forest of Bai Niu Maple, , And the soil organic carbon and nutrient content were determined. The effects of different forest types on soil organic carbon accumulation and the correlation between soil nutrients and organic carbon were analyzed. The results showed as follows: 1) Soil organic carbon density of four stands in the study area was higher than that of the mixed forest (18.21kg · m-2)> mixed forest (16.16kg · m-2) · M-2)> mixed color forest (14.23kg · m-2). 2) The variation regularity of soil organic C content and density in four stands basically follow the mixed forest of Ulmus pumila and White Cattle Acer mixed forest> the mixed forest of Aegiceras corniculata> 3) The correlations of soil organic carbon and nutrients were different in all four stands, and there was significant correlation between soil total organic phosphorus and total phosphorus in the soil organic carbon in the mixed plantation, There was significant correlation between soil total nitrogen and available nitrogen, and soil organic carbon in the four stands. The results of correlation analysis indicated that soil organic carbon was closely related to soil nutrient status in the four forest types.