池杉在海岸带滨海草甸盐渍土中的生长表现

GROWTH PERFORMANCE OF TAXODIUM ASCENDENS IN THE COASTAL MEADOW-SALINE SOIL ON THE COASTAL ZONE

对新会市海岸带复合农林业试验区的池杉林带进行了生长调查。结果表明 :池杉在 pH值为8.15 ,盐分含量为 0 .5 15 %的海岸带滨海草甸盐渍土中生长良好 ,5年生林带平均树高达 5 .9m以上 ,胸径达10 .7cm以上 ,已开始起到防护作用 ;13年生时树高达 11.2m ,胸径达 17.9cm ,年平均树高、胸径分别为0 .86m和 1.38cm ,生长较为迅速 ,可作为我省海岸带复合农林业防护林带的主要树种。地下水位对池杉的树高和胸径生长有一定的影响 ,在海岸带营造池杉林带时 ,宜选择地下水位低于 5

An investigation was conducted about Taxodium ascendens stand at the agroforestry management experiment area of reclaimed land in Xinhui city. The results showed that T.ascendens grows well in the coastal meadow-saline soil which pH is 8.15 and contents of salinity is 0.515%. The height and diamter of 5-years old stand were over 5.9 m and 10.7 cm respectively. When 13 years old, its height and diamter were over 11.2 m and 17.9 cm. It could act as mainly species of shelter belt of coastal agroforestry management. On coastal area, water table level influenced the the growth of T. ascendens by height, diameter and biomass, so the planting site had better selected the land where the water table level is 50 cm below soil surface.