北方阔叶树木固氮与非固氮树种间营养元素含量的差异及数量化分类  

TX Variations of nutrient contents and its numerical classification among nitrogen fixing and non nitrogen fixing tree species of north deciduous trees.

作　　者：李培芝[1] 王力华[1] 许思明[1] 

机构地区：[1]中国科学院沈阳应用生态研究所

出　　处：《应用生态学报》1998年第3期242-246,共5页Chinese Journal of Applied Ecology

基　　金：中国科学院陆地生态系统痕量物质生态过程开放实验室基金

摘　　要：研究了北方阔叶树木中固氮和非固氮树种间养分元素含量的差异及季节变化趋势．在生长旺盛期到落叶期固氮和非固氮树种叶片之间Ｎ、Ｍｇ含量始终存在明显差异；固氮树种叶片中Ｎ、Ｋ含量降低的趋势明显低于非固氮树种，所研究的其它５个元素和灰分的季节变化率即累积的趋势则高于非固氮树种．在Ｆ检验和Ｔ检验的基础上，选择Ｎ、Ｐ、Ｍｇ、Ｓｉ４个营养元素为参数进行的数量化分类，成功地区分了固氮和非固氮树种．Abstract Nitrogen fixing and non nitrogen fixing species of north deciduous trees were studied to characterize the variation of nutrient contents and its seasonal dynamics. The results showed that the content of N and Mg in foliage was significantly different between nitrogen fixing and non nitrogen fixing trees during fast growing to leaf fallen period. The reduction tendency of N and K contents in N fixing trees was much slower than that of non N fixing trees, but the accumulation of other elements and ash was higher than that in non N fixing trees. Based on F test and T test, elements N,P,Mg and Si were selected as variables for numerical classification, and N fixing and non N fixing tree species were divided successfully.

关 键 词：阔叶树木 固氮树种 养分含量 数量化分类 北方 

分 类 号：S718.43[农业科学—林学] S718.554.2