采伐干扰对兴安落叶松林土壤化学性质的影响  

Effect of Logging Interference on the Chemical Properties of the Soil of Xing’an Larch Forest

作　　者：包田梅 铁牛[1] BAO Tianmei;TIE Niu(Forestry College,Inner Mongolia Agricultural University,Hohhot 010109,China)

机构地区：[1]内蒙古农业大学林学院,呼和浩特010109

出　　处：《森林工程》2020年第2期1-5,共5页Forest Engineering

基　　金：国家重点研发计划子课题(2017YFC050400302)。

摘　　要：本文针对内蒙古大兴安岭兴安落叶松林采伐迹地不同恢复年限的土壤化学指标的变化进行研究,是为天然林自我恢复情况进行评价,为内蒙古大兴安岭林区的经营管理提供依据。实验用土壤的pH,及全碳、全氮、全磷、全钾的含量,按照《森林土壤实验教程》和《土壤农化分析》计算。采用单因素方差(ANOVA)分析(SPPS 13.0软件)研究采伐干扰对土壤化学性质的影响。结果表明:①对比兴安落叶松天然林(对照样地)和皆伐、渐伐两种不同采伐干扰迹地兴安落叶松林土壤pH、全碳和其他营养成分之间的差异。得到渐伐和皆伐对土壤化学性质有显著性差异(P<0.05);皆伐与土壤全氮含量呈极显著的正相关关系(P<0.01),与土壤含碳量和pH呈显著的正相关关系(P<0.05)。②比较不同年份采伐方式对土壤理化性质的显著性, 1987年的采伐迹地与2014年的采伐迹地有一定的差异, 2009年与1987年、2014年的采伐迹地差异不明显。得到结论是:森林采伐干扰能降低土壤的pH,客观上使土壤养分得到增加,或许有利于森林自然更新。采伐干扰明显影响土壤碳和其它营养元素的平衡。This paper studies and discusses the changes of soil chemical indexes in different recovery years of Xing’an larch forest in Daxinganling, Inner Mongolia, in order to evaluate the self recovery of natural forest and provide basis for the management of Daxinganling forest in Inner Mongolia. The pH, C content, whole nitrogen, whole phosphorus and whole potassium content of the soil used in the experiment were calculated according to the Forest Soil Experiment Tutorial and the Soil Agroization Analysis. The effects of logging interference on the chemical properties of soil were studied using a single-factor variance(ANOVA) analysis(SPPS 13.0 software). Results showed that: ① comparing the differences in soil pH, soil C and other nutrients in Xing’an larch natural forest and two different interference plots of clear cut and gradual cut, it is found that clear cut and gradual cut have significant differences in soil chemical properties(P<0.05). Clear cut has an extreme significant positive correlation with soil total nitrogen(P<0.01), and a significant positive correlation with soil carbon content and pH(P<0.05).② Comparing the significance of different cutting methods on soil physical and chemical properties in different years, there is a certain gap between the logging sites in 1987 and 2014, while the differences between the logging sites in 2009, 1987 and 2014 are not significant. Conclusion: deforestation interference can reduce the pH of soil, objectively increase soil nutrients, and may be conducive to the natural renewal of forests. Logging interference significantly affects the balance of soil carbon and other nutrients.

关 键 词：采伐干扰 兴安落叶松林 不同年份 土壤养分 

分 类 号：S718.5[农业科学—林学]