| Abstrak/Abstract |
Aluminum (Al) contained in acidic soil could become an obstacle for plant growth. The Al toxicity could inhibit
root growth, water and nutrient absorption. One of the solution to overcome Al toxicity was by applying Silica
(Si). The aim of this research was to study the impacts of Al to the growth activity of oil palm and to know the
effects of Si to the growth activity of oil palm contaminated by Al. The factorial treatments were arranged in a
complete random design with two factors. The first factor was Al toxicity, i.e. with and without Al, while the second
factor was the application of Si that consisted of four levels (0, 32, 64, 96 gram per plant). some of variables included
leaf area ratio (LAR), leaf area, net assimilation rate (NAR), relative growth ratio (RGR), plant height, and plant dry
weight were observed. The result showed that Al toxicity decreased the LAR, leaf area, NAR, RGR, plant height, and
plant dry weight. The application of Si 32 gram per plant increased leaf area ratio and was not significantly different
from the application of 96 gram Si per plant. However, the application of Si to oil palm contaminated with Al
did not affect to relative grow rate, but its application to normal plant would increase the relative growth ratio. |
