土壤pH值对康定木兰幼苗生长的影响

Influences of pH Values in Soil on Magnolia dawsoniana Seedling Growth

本文研究了不同土壤pH值处理对康定木兰幼苗生长的影响,以pH值为7.5的土壤作为对照,不同pH值处理分别为4.5、5.5、6.5、8.5和9.5,通过对幼苗在不同土壤pH处理下表现情况和生长指标的测定发现:pH为5.5~7.5时,康定木兰幼苗的形态特性、株高生长量、地径生长量、叶面积都明显优于其他处理。其中pH为6.5时,康定木兰幼苗的各项所测指标都达到了最大值。pH<5.5或PH>7.5时康定木兰幼苗生长受到明显抑制。

In this paper, studies were made of the effect of different soil pH treatment on the growth of M. dawsoniana seedlings. With pH value of 7.5 as the control, the treatments were conducted by using different pH values of 4.5,5.5,6. 5,8.5 and 9.5, respectively. The experimental results displayed the damage and growth parameters of seedlings under different soil pH treatments. When pH value was between 5.5 to 7.5, the morphological characteristics, plant height growth, basal diameter and leaf area of the seedlings were remarkably higher than other treatments. Among them, all indicators of seedlings reached the maximum when pH value was 6. 5. Besides, when pH value was lower or higher than 5.5, the growth of seedlings was significantly inhibited.