9个耐旱树种在沿海困难立地的生长表现

The growth performance of 9 drought tolerant tree species in difficult coastal areas

在湛江市坡头南三林场沿海困难立地开展了9个耐旱树种的造林试验,从树高、胸径、冠幅和保存率4个方面进行评价和选择,高生长、胸径生长和冠幅生长较快的均是大叶相思(Acacia auriculaeformis),高生长量比平均值高1.44m;胸径生长量比平均值高出1.57cm;树冠生长量比平均值高出0.54m;9个树种保存率最高的大叶相思达91.2%,而其中3个树种大叶紫檀(Dalbergia louvelii)(47.6%)、加勒比松(Pinus caribaea Morelet)(13.7%)、黑金刚(Ficus elastica)(9.2%)都低于50%。

The afforestation experiments of 9 drought-tolerant tree species were carried out in the coastal areas of south three forest farm.From the tree height,diameter at breast height,crown breadth of four aspects to carry on the evaluation and selection,high growth,growth of DBH and crown growth faster,leaf acacia high growth was 1.44 m higher than the average;1.57 cm higher than the average DBH growth,The crown growth was0.54 m higher than the average The highest rate of preservation in 9 tree is Acacia auriculae formis（91.2%）,and three species of Dalbergia louvelii（47.6%）,Pinus caribaea Morelet（13.7%）,Ficus elastica（9.2%）are less than 50%.