马占相思种源试验

本文对马占相思两个试验点8个种源的3年生幼林生长进行分析。结果表明:各种源间的差异极显著。树高、胸径生长及材积和抗风力等指标,均以昆士兰的13242号种源最好。其树高、胸径、材积分别为最差种源的154％、158％、387％;其次是巴布亚新几内亚的13459号种源,树高、胸径、材积生长也为最差种源的144％、160％、370％;而印度尼西亚的13621号种源最差。同时,各种源的生长量与降水量、相对湿度和温度成正相关。

THE PROVENANCE TRIAL OF ACACIA MANGIUM

This paper analyses the growth of 8 provenances of Acacia mangium plantation in 3 years old in two sites,the research result shows the analy sis of variance is significant between the 8 provenances. The best provena nee is No. 13242 which from Queensland whether in height, diameter breast height and volume increment or wind-resistance index. Its height, diameter breast height and volume increment has 154%, 158% and 387% as compared with the poor seed source. The second is No. 13459 which from papua-New Guinea,its height, diameter breast height and volume increment also has 144%, 160% and 370% as compared with the poor one. The provenance No. 13621 from Indonesia shows a poorest performance.Besides, the growth in each provenance has a positive correation with rainfull, humidity and heat. The height, diameter breast height and volume increment of Acacia mangium in the latter half of the year is larger than the first half of the year.