开敞度调控对人工红松阔叶林土壤理化性质的影响  

Effect of Opening Degree Regulation on Soil Physical and Chemical Properties in a Mixed Plantation Forest of Korean Pine

作　　者：丛健[1] 

机构地区：[1]辽宁省林业厅外资项目办公室,沈阳110036

出　　处：《森林工程》2016年第5期1-6,共6页Forest Engineering

基　　金：科技部农业科技成果转化资金项目(2007GB24320427);"十一五"国家科技支撑计划项目(2006BAD03A04)

摘　　要：以进行开敞度调控的人工红松阔叶林为研究对象,通过空间代替时间的方法对比分析了两个生长阶段（开敞 度调控15年的 Ⅰ 阶段和22年的Ⅱ 阶段）土壤理化性质的变化规律,评价不同强度开敞度调控对人工红松阔叶林土壤生态效 益的影响.结果表明,林分开敞度调控后,不同土层土壤容重随着时间表现出均质的趋势;上层土壤总孔隙度、非毛管孔 隙度、ph 值及有机质含量均显著高于下层.表层土壤和下层土壤之间的速效氮含量差异显著; Ⅱ阶段速效钾含量高出阶段 Ⅰ幅度为38.41% -51. 88%.不同开敞度调控对土壤理化性质影响差异仅存在于不同生长阶段,现有开敞度调控强度在合 理范围之内,且表现出一定程度的正效益,为改进和完善在“栽针保阔”思想指导下建立起来的红松阔叶树人天混交林的 精准化培育提供了科学依据.The secondary korean pine broad - leaved forests with opening degree regulations were studied and the method of spa-tial sequence instead of time successional sequence was used to compare the variation laws of soil physical and chemical properties of forests at two growth stages （i. e. stage Ⅰof 15 - year opening degree regulations and stage Ⅱ of 22 - year opening degree regula-tions） and the effect of different regulation degrees on the ecological benefits of soil of mixed korean pine plantation forest was evalua-ted. The results showed that the bulk density of different soil layers were homogeneous in the two korean pine plantation growth stages after the opening degree regulations ; total soil porosity, soil non - capillary, pH and soil organic matter content in upper layer signifi-cantly were higher than that of in subsoil. The nitrogen content in upper layer significantly differed from the subsoil. The potassium content in the two growth stage Ⅱ was 38. 41% -51. 88% higher than that in stage Ⅰ . The difference of effect of different opening de-gree regulations on soil physical and chemical properties only exited in different growth stages. The current opening degree regulation is reasonable and exhibits positive benefits. This study provides scientific basis for the accurate management in a mixed forest of korean pine planted under secondary forest.

关 键 词：次生林 红松 开敞度调控 土壤理化性质 

分 类 号：S792[农业科学—林木遗传育种]