选择了无瓣海桑和秋茄2个红树林造林树种，在粤东沿海前沿深水潮汐困难地带（退潮水深20 cm以上、退潮水深为0～20 cm和退潮植地裸露3种立地条件）进行了2年的造林试验。结果表明：（1）随着退潮水位的加深（即海水淹浸程度的增加），无瓣海桑和秋茄幼树的保存率和生长量都逐渐减低。（2）随着生长期的延长，无瓣海桑和秋茄幼树的保存率都有逐渐降低的趋势。当生长期未超过1年时，幼树生长和成活极不稳定，保存率骤减；当生长期超过1年后，无瓣海桑保存率趋于相对稳定，秋茄保存率继续下降，极难长久保存和定居。（3）无瓣海桑忍耐海水淹浸的能力强于秋茄。在深水位区域，种植红树林可以选择无瓣海桑，而不宜种植秋茄。（4）垫高植地，可以提高红树林植物的保存率。%The afforestation tests of mangrove species Sonneratia apetala and Kandelia candel have been carried out in the deep-water tidal dififcult sites in coastal front of eastern Guangdong province for two years. The results show that:(1) The survival rate and growth of S. apetala and K. candel gradually decreased as the water level of ebb tide became deeper. (2)The survival rate of S. apetala and K. candel gradually reduced when the growth period became longer;the survival rate decreased greatly during the ifrst year after being planted, showing the growth and survival was unstable at the early stage of development;after one year, the survival rate of S. apetala tended to be steady, while that of K. candel continued to decrease, is dififcult to preserve long term. (3) The ability of water flooded patience of S. apetala was better than that of K. candel. It is suggested that S. apetala should be planted instead of K. candel in the deep-water zone. (4)Filling up the planting ifeld can improve the survival rate of mangrove species.
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