International journal of scientific and research publications | 2019
The Influence of Depth and Sargassum Weight on The Growth of Kappaphycus alvarezii
Abstract
Kappaphycus alvarezii is one type of algae that is widely cultivated by coastal communities. Seaweed growth can be hampered due to fluctuating waters and extreme conditions. Where one of the factors that influence the growth of seaweed is the level of depth. Other factors that affect the growth of seaweed and can reduce production include changes in salinity, water temperature, light intensity, this is the main factor triggering the outbreak of ice-ice disease. When seaweed is stressed, it can facilitate ice-ice disease and epiphytic infections attack under stressful conditions Sargassum aquifolium contains active compounds that function as antibacterial, antiviral and antifungal substances used as a barrier to the development of bacterial pathogens so that they can increase grass yields. Alvarezii. The study was designed using Factorial Randomized Complete Design (CRD) with 2 factors, namely the level of depth of the sea surface (A) and the weight of Sargassum sp. (B). The first factor (A) consists of 3 levels, namely (A1: 30 cm depth) (A2: 45 cm depth), and (A3: 60 cm depth) (Grace, 2017). The second factor (B) consists of 4 levels, namely (B1: 0 grams), (B2: 15 grams), (B3: 25 grams) and (B4: 35 grams) with a distance of 30 cm between ropes. Based on these two factors, there are 12 combinations of treatments. Data from research results with growth variables analyzed the differences using Analysis of variance (ANOVA) at the error level of 5%. If there is a significant effect followed by W-Tukey s further test. The depth factor tends to be higher in depth of 60 cm and 30 cm and tends to be lower at a depth of 45 cm. Sargassum weighting factors tend to be higher in the 0 gr weight or control treatment compared to the weights of 15gr, 25gr and 35gr. There is no interaction between the two for the growth of seaweed on Kappapycus alvarezii.