摘要
1992年6~10月,在长白山自然保护区(海拔高度740m),用现代化学、生物化学分析方法,对原始阔叶红松林的土壤N素供应状况,优势树种林木N素营养与土壤N素供应关系及与物候的关系,优势树种间N素营养关系进行了动态研究。结果表明:(1)根层土壤含水率、全N含量、NO3-N和NH4-N含量与其上层动态趋势相似并和下层土壤有较大相关性;(2)原始阔叶红松林冠层优势树种林木特别是红松在生长季对NO3-N、NH4-N吸收利用和土壤N素供应状况是极其适应的,而且这些树种对N素的需求和其物候情况紧密相关;(3)在生长季中,各种林木对N素吸收利用在时间动态上是不一致的,避免了树种间对N素需求的激烈竞争,使群落保持稳定。
In the vegetative period from June to October in 1992,at the elevation of 760m of Changbai Mountains Natural Reserve.we studied the nitrogen nutrient dynamic process on the soil and the relation among nitrogen,dominant tree species and climax.With the Chemical and Biochemical analytical methods,we analyzed nitrogen contents,available nitrate(NO3) and ammonia(NH4+) in different layers of soil,nitrogen nutrient situation and relation to the dominant tree species in different interval.The conclusions are as follows.1.The water content,nitrogen content.NO3-N and NH4-N content of root system layer had the same dynamic process at the upper layer and also relation to the lower layer.2.The dominant tree species in the virgin duciduous korean pine forest,such as Fraxinus mandshurica.Acer mono.Tilia mandshurica,especialy Pinus koraiensis absorbed nitrate and ammonia to coincide with those content of the soil and with some relationship to phenological aspect in vegetative period; 3.In their growth period the different tree species had its own time to absorb nitrogen nutrient in order to keep the stable community without serious competition.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
1994年第4期22-26,共5页
Journal of Northeast Forestry University
基金
中科院长白山森林生态系统定位研究站资助
关键词
阔叶红松林
氮素营养动态
物候
Deciduous korean pine forest
Nitrogen nutrient dynamics
Phenology
Stability