摘要
为了探讨不同林龄山杨天然次生林土壤理化性质的差异,以辽河源地区山杨Populus davidiana为研究对象,研究了不同林龄的林分土壤理化特征及其垂直分布特征。结果表明：（1）随着林龄的增加,山杨在0-100 cm各土层土壤容重（1.07-1.69 g·cm^-3）和土壤全K含量（4.32-4.72 g·kg^-1）均表现出成熟林〉近熟林〉中龄林,而土壤含水量（7.35%-24.39%）从高到低为中龄林〉近熟林〉成熟林。土壤全N含量（0.28-2.76 g·kg-1）、土壤全P含量（0.46-1.37 g·kg^-1）先增加后降低,即近熟林〉成熟林〉中龄林,而土壤p H值（5.03-5.98）变化规律为先降低后增加,表现为成熟林〉中龄林〉近熟林。土壤有机质含量（2.64-31.99 g·kg^-1）的变化规律较为波动,在0-20 cm土层为近熟林〉中龄林〉成熟林,但在20-100 cm土层则呈现出相反的变化规律。（2）各林龄林地土壤容重、土壤全K含量随着土层深度的增加而增加,土壤含水量、土壤有机质含量、N、P含量随着土层深度的增加逐渐降低,土壤p H值随着土层深度的增加呈先升后降的变化趋势。（3）土壤理化性质各指标相关性分析表明,土壤含水量与土壤容重呈极显著负相关,与土壤有机质、全N呈极显著正相关;土壤容重与土壤有机质、全N呈极显著负相关;土壤p H值与土壤全K呈极显著负相关;土壤有机质与全N呈极显著正相关,与土壤全K呈极显著负相关;土壤全N与土壤全P呈极显著正相关,与全K呈极显著负相关;土壤全P与土壤全K呈极显著负相关。
The characteristics of soil physical and chemical properties at different stand ages and soil layer depth were investigated in Populus davidiana natural secondary forests of Liaoheyuan Nature Reserve in Hebei province, in order to explore the effects of different forest ages on the soil physicochemical characteristics. The results show that （1） With the increase of forest ages, the soil total K contents （4.32 - 4.72 g·kg^-1） and soil density values （1.07 - 1.69 g·cm^-3） of the P davidiana stands in 0 - 100 cm soil layers ranked with an order： mature forest 〉 nearly mature forest 〉 middle-aged forest, whereas those of soil moisture （7.35% - 24.39%） sequenced as follow： middle-aged forest 〉 nearly mature forest 〉 mature forest on; Soil total N contents （0.28 - 2.76 g·kg^-1） and soil total P contents （0.46 - 1.37 g·kg^-1） increased first then decreased gradually and sorted from high to low as： nearly mature forest 〉 mature forest 〉 middle-aged forest, while soil pH values （5.03 - 5.98） decreased first and then increased significantly and ordered as mature forest 〉 middle-aged forest 〉 nearly mature forest; The soil organic matter （2.64 - 31.99 g·kg^-1） fluctuated according to the forest age in 0 - 20 cm soil layer and ranked as： nearly mature forest 〉 mature forest 〉 middle-aged forest, but they had the contrary tendency in 20 - 100 cm soil layer. （2） The soil pH increased firstly and then decreased gradually, the soil bulk density and soil total K content increased with the soil layer depth while the soil moisture, soil organic matter, soil total N, soil total P and soil total K exceeded the rate of increase with the soil layer depth of every forest age. （3） Correlation analysis showed that there were correlations between each physical and chemical indexes in different levels, the soil moisture had a negative correlation with soil bulk density while had positive correlations with soil organic matter and soil total N; The soil bulk density had
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2016年第1期52-57,共6页
Journal of Central South University of Forestry & Technology
基金
国家林业公益性行业科研专项"森林生态服务功能分布式定位观测与模型模拟"(201204101)
关键词
山杨
天然次生林
不同林龄
土壤垂直分布特征
土壤理化性质
辽河源地区
Populus davidiana
natural secondary forest
different forest age
vertical distribution characteristics of soil
soil physical and chemical properties
Liaoheyuan Natural Reserve in northern Hebei province
