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Abstract
Sea grapes (Caulerpa lentillifera) is a species of seaweed with high nutritional value, which is widely cultivated in Vietnam’s coastal areas. Currently, total sea grapes cultivating area in Vietnam is about 600 hectares, the average yield is 20 tons per hectare annually. However, the consumption of sea grapes is quite low because of its difficulty in preservation and quick spoil after harvest. One of the main reasons is that the sea grapes is mechanically damaged at cutting area during harvest time. The purpose of this study is to identify the suitable conditions for the re-planting of sea grapes after harvest in order to improve the initial quality of raw material. The results showed that: the rate of sea grapes in sea water was 2%; growing time was 2 days; light intensity was 10-15 klux, the temperature of medium was 28°C, the dissolved oxygen in water was 8 mg/l. In these conditions, the sea grapes could recovered 95.7%, the rate of sea grapes had new branches 0%, the vitamin C content accounted for 0.265 mg/g, the total protein content accounted for 13.1%, the total lipid content accounted for 2.89%, the total fiber content accounted for 3.67% and the good sensory quality according to TCVN 3215-79.