灯台树生长与土壤养分含量的关系

应用相关、回归和通径分析研究了灯台树生长因子与土壤养分的关系,结果表明:不同土壤养分因子对灯台树树高、50 cm处干径和分枝数的影响作用不同,其中有机质和钾素含量的高低对促进灯台树高生长作用最为明显,碱解氮、交换性镁和pH值是影响灯台树干径生长和分枝的重要因子.因此,在人工大面积栽种灯台树时,提高土壤有机质和钾素的含量,改良土壤酸度,对灯台树生长极为有利.

On Relationship between Soil Nutrient Content and Growth of Alstonia scholaris

The relationship between the growth of Alstonia scholaris tree species and soil nutrients and pH value was explored by means of correlation analysis,regression analysis and path analysis.The results showed that the height,trunk diameter at 50 cm height above the root collar,number of the branches of A.scholaris trees were affected by different soil nutrient factors.Among which the organic matter content and total K content in the soil affected most significantly on the height growth of the tree species;the alkalisoluble N,the exchangeable Mg and pH value were the most important factors affecting the diameter growth and branch formation.Increasing the content of organic matter and K content and ameliorating acidity of the soil would be helpful to promoting the growth of A.scholaris saplings for large scaled forestation with this tree species.