华南沿海基围渔塘内无瓣海桑Sonneratia apetala的生长效应

Growth of mangrove species Sonneratia apetala in the coastal fishing-pounds in south of China

在华南沿海基围渔塘内人工控水条件下进行了红树植物无瓣海桑的人工恢复试验,结果表明:(1)基围内不同控水滩血高程对红树植物无瓣海桑的生长量和成活率有显著影响,随着滩面控水高程的增加,无瓣海桑的生长量与成活率有降低的趋势;(2)基围内种植密度对无瓣海桑的生长有显著的影响:在一定的控水滩面高程下,种植密度越大,生长越差;(3)种植季节对无瓣海桑种植初期的生长影响显著,较冷季节时种植不利于无瓣海桑的成活和生长;(4)在一定的条件下,种植20个月后基围内、外无瓣海桑的生长和成活情况基本接近,差异较小;(5)在基围渔塘内,大米草对红树植物无瓣海桑种植后的初期生长有一定的抑制作用。研究结果可以为华南沿海大面积的基围渔塘内红树林的生态恢复提供一定的理论参考。

The growth of mangrove species Sonneratia apetala Buch.-Ham. were studied under the condition of man-controlled water in the coastal fishing-pounds in southern China. The results showed that: (1) The height of the mudflat with controlled water in the fishing-pounds greatly influenced the growth and survival of Sonneratia apetala and the growth and survival rate increased with the height of the mudflat; (2) The planting density influenced the growth of Sonneratia apetala severely, that is, under certain height of mudflat with controlled water, the bigger the density is, the worse Sonneratia apetala grew; (3) The planting time remarkably influenced the early growth of Sonneratia apetala, planting in colder season was unfavorable to the growth and survival of Sonneratia apetala; (4) Difference between inside and outside of the fishing-pound: under some conditions, the growing condition inside the fishing-pound was near to that of outside; (5) Spartina anglica somewhat inhibited the early growth of Sonneratia apetala in the fishing-pound. The results can serve as the theory and basis for the mangrove restoration in the large area coastal fishing pounds in southem China.