干露和冷藏对坛紫菜及杂藻存活与生长的影响  

Influence of desiccation and cold preservation on the survive and growth of Porphyra haitanensis and unwanted-alga

作　　者：陈昌生[1] 翁琳[1] 汪磊[1] 纪德华[1] 谢潮添[1] 徐燕[1] 

机构地区：[1]集美大学水产学院,福建厦门361021

出　　处：《海洋学报》2007年第2期131-136,共6页

基　　金：福建省科技重大专项资助项目(2004NZ03);国家海洋863资助项目(2002AA603023);厦门市科技局资助项目(3502Z20041051)

摘　　要：将人工养殖的坛紫菜叶状体及与其有生长竞争关系的5种大型杂藻——肠浒苔、条浒苔、孔石莼、真江蓠、水云以及卵形藻等进行干露和冷藏实验．结果表明，坛紫菜叶状体干露至含水率10％～15％后直接培养，其成活率在99％以上，增重率与未经干露组的相比无显著差异；大型杂藻干露后含水率低于25％时则全部死亡；坛紫菜叶状体含水率为10％～15％时，在低温-20℃冷藏30d后进行培养，成活率达99％～100％，当含水率低于10％时，其成活率低于30％；坛紫菜叶状体含水率高于或低于10%～15％时进行低温冷藏，均会影响其成活率及冷藏后培养时的藻体增重率；与坛紫菜叶状体冷藏相同天数的大型杂藻，其死亡率达到100％；干露和冷藏可以有效地杀死与坛紫菜叶状体有竞争关系的杂藻，并且可以应用于生产以提高坛紫菜产量．The manual cultured Porphyra haitanensis thallus and five large scale unwanted-alga which have growth competitive relations with P. haitanensis thallus： Enteromorpha intestinalis , E. clathrata , Ulva pertusa, Gracilaria asiatica and Ectocarpus confervoides, together with the samples of Cocconeis spp. , were tested by means of desiccation and cold preservation. The results indicated that when it was cultured directly after being desiccated to the water content of 10%-15%, the survival rate of the P. haitanensis thallus was over 99%, showing no significant difference from those without desiccation, whereas all the large scale unwanted-alga would die if the water content was below 25 % after desiccation. When the water content of the P. haitanensis thallus was 10%, culture them after being stored at a low temperature of - 20℃ for 30 days, then the survival rate would reach up to 99% - 100%. If the water ratio was below 10%, then the survival rate would be lower than 30%, and death even occurred. When the P. haitanensis thallus was stored with the water content ratio higher or lower than 10% - 15% under low temperature, both its survival rate and the rate of weight gain when cultured after cold preservation would get affected. However, cold preservation duration would bring a 100% death rate to the large scale unwanted-alga. Therefore, the ways of desiccation and cold preservation could effectively kill the unwanted-algas that have competitive relations with P. haitanensis thallus, which could be applied to raising the yield of P. haitanensis in practice.

关 键 词：坛紫菜 大型杂藻 底栖硅藻 干露 冷藏 

分 类 号：S963.213[农业科学—水产养殖]