交趾黄檀幼林施肥效应分析

Fertilization Effect of Young Forest of Dalbergia cochin-chinensis

开展不同施肥量对交趾黄檀幼树生长影响的试验。结果表明,5年生交趾黄檀胸径、树高、材积、冠幅生长量最大的为处理3(350 g/株),分别为7.12 cm、5.96 m、0.012 8 m^(3)、3.20 m,分别比林分平均胸径6.24 cm、树高5.23 m、材积0.009 2 m^(3)、冠幅3.06 m提高14.1%、13.96%、39.13%、4.58%。应用层次分析法得到综合得分最高的为处理2(250 g/株),表明在合理范围内增加施肥量可加速幼树生长,但交趾黄檀冠幅大,侧枝发达,易受风害,不是施肥量越大越好,应适当控制施肥量。

Experiments were carried out on the effects of different fertilization rates on the growth of young forest of Dalbergia cochin-chinensis. The results showed that the highest growth of DBH, tree height, timber volume and crown width of 5-year-old Dalbergia cochin-chinensis was in treatment 3(350 g/plant), which were 7.12 cm, 5.96 m, 0.012 8 m^(3) and 3.20 m respectively, which were 14.1%, 13.96%, 39.13% and 4.58% higher than the average DBH of 6.24 cm, tree height of 5.23 m, timber volume of 0.009 2 m^(3) and crown width of 3.06 m, respectively. The highest comprehensive score obtained by the analytic hierarchy process was treatment 2(250 g/plant), indicating that increasing the amount of fertilizer within a reasonable range could accelerate the growth of young trees, but the amount of fertilizer should be properly controlled due to the large crown width, developed lateral branches and vulnerable to wind damage of Dalbergia cochin-chinensis.