期刊论文

Research on the relationship between spatial structure and soil nutrients of Cunninghamia lanceolata forest based on path analysis method

中文

中南林业科技大学学报

1673-923X

2020

40

7

41-47

10.14067/j.cnki.1673-923x.2020.07.006

湖南省自然基金项目（2018JJ2673）； 国家“十二五”科技支撑项目（2012BAD22B0505）；

本校为第一机构

【目的】研究杉木林空间结构对土壤养分的影响,探讨各空间结构因子对土壤养分指标的作用机理及其关系。【方法】以湖南省福寿林场内的杉木林为研究对象,选择幼龄林、中龄林、近熟林3个龄组的杉木人工林,运用通径分析法,对林分各空间结构因子和土壤养分之间关系进行分析。【结果】林层指数对土壤有机质含量、全N含量、全K含量具有较强的直接影响,林层指数对有机质含量(直接通径系数为1.09)产生了绝对值最大的直接正效应,对全K含量(直接通径系数为-1.022)产生直接负效应,全混交度对全K含量(直接通径系数为1.196)和全P含量(直接通径系数为0.778)具有较强的直接影响。影响土壤全P的主要因素依次为全...

【Objective】To study the effect of spatial structure on soil nutrients in Cunninghamia lanceolata forest, and to explore the mechanisms and relationships of spatial structure factors on soil nutrient indicators.【Method】Taking the Cunninghamia lanceolata forestin Fushou forest farm of Hunan province as the research object, three age groups of young forest, middle-aged forest and nearmature forest plantation were selected. Path analysis method was used to analyze the relationships between spatial structure and soil nutrients.【Result】Forest l...