【摘要】 <正>江蓠是提取琼胶的主要原料之一,大多数是依靠天然资源。各地区由于对江蓠资源的不合理采收,产量逐年下降。要使江蓠产量得到提高,除了保护天然资源、合理采收之外,开展江蓠的人工养殖,是弥补天然资源不足的有效途径。Chang报道了在台湾省利用鱼塭、虾池进行大面积江蓠养殖,产量相当高。 汕头沿海地区为亚热带气候,不仅气温和环境条件适宜江蓠的生长,而且还有几十万亩滩涂和鱼塭,其中一部分即可作为江蓠人工养殖的场所。 近年来,我们在汕头沿海地区,进行了江蓠种类和生态环境的调查和人工养殖试更多还原

【Abstract】 Field observations of Gracilaria cf, verrucosa (Huds.) Papenfuss at Nanao Island, Guangdong Province show that the plant grows rapidly from late March to April and reaches maximumbiomass in April ;thereafter, the thalli gradually disintegrate. During summer months, when the surface temperature of the seawater exceeds 30℃ sometimes, the species disappears from the intertidal zone, only those submerged in fish "wen"(a kind of fish pond on the intertidal zone with a fish lock at the opening) and ditches remain healthy. Preliminary results of growth in fish "wen"at Nanao Island show that the fresh weight of the thalli can double in about one month without any additional nutrients. Measurement of random samples of plants from natural populations in fish "wen", ditch streams and the intertidal zone of Nanao Island showed a large proportion of plants over 20 cm in length in April, which agrees with our experimental observations. It is suggested that harvesting G. cf. verrucosa for agar in this subtropical area of Shantou should take place in April, certainly no later than early May.更多还原