Growth Of Kappaphycus Alvarezii Research Articles

The utilization of thalus cutting results to growth and carrageenan content (kappaphycus alvarezii) in Hansisi Water, Semau District, Kupang Regency

The growth of Kappaphycusalvarezii is one of the biological aspects influenced by the seeds of the method and the planting system in determining the carrageen content. This study aims to determine the effect of the use of seedlings resulting from the passage of thalus seaweed to the growth and carrageenan content of seaweed K.alvarezii). The method used is an experimental method with a long line system implemented in Hansisi, Semau, Kupang District waters for 5 months from April to September 2017. The results showed that the average growth of K.alvarezii cultivated during 45 days in Hansisi waters, Semau District using seeds the results of the excerpts thallus are 724 ± 15.30 g and seeds without of excerpts thallus are 546 ± 15.17 g. Carrageen content generated from seed of the excerpts thallus: 56,17% and seed without of excerpts thallus : 45,13%. Water content on seedling treatment of the excerpts thallus: 11,97 ± 0,13%, while without of excerptethallus: 17,03 ± 0,15%. Ash content on seed treatment of excerpts thallus: 28,53 ± 0, 21% and without of excerpts thallus 12,38 ± 0,04%. Average nitrate content in Hansisiwaters 1.02 - 2.3 mg / l, whereas a good nitrate content for aquaculture of 1.0 - 3.2 mg / l, phosphate content (PO4) :0.015 - 0.10 mg / l.

PERTUMBUHAN BIBIT RUMPUT LAUT (Kappaphycus alvarezii) HASIL KULTUR JARINGAN DENGAN BERAT BIBIT YANG BERBEDA

Penelitian ini bertujuan untuk mengetahui pengaruh berat bibit kultur jaringan yang berbeda terhadap pertumbuhan rumput laut Kappaphycus alvarezii dan untuk mengetahui berat bibit hasil kultur jaringan yang optimal untuk pertumbuhan rumput laut jenis Kappaphycus alvarezii. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL) yang terdiri atas 4 perlakuan menggunakan bibit hasil kultur jaringan dengan perbedaan berat bibitnya.Perlakuan tersebut adalah P1 : bibit dengan berat 50 gr, P2 : bibit dengan berat 75 gr, P3 : bibit dengan berat 100 gr, P4 : bibit dengan berat 125 gr. Perlakuan diulang sebanyak 4 kali (4 rakit). Data variabel penelitian yang diperoleh, ditabulasi menggunakan mikrosof excel dan dianalisis menggunakan analisis sidik ragam (ANOVA) pada taraf nyata 5%, kemudian dilakukan uji lanjut dengan uji Least Significant Difference (LSD). Hasil pertambahan berat tertinggi didapat pada berat 125 gr dan laju pertumbuhan tertinggi pada berat 50 gr, dimana pada setiap perlakuan ini berpengaruh (p<0.05) berat bibit terhadap pertumbuhan. Hal ini berkaitan dengan persaingan setiap individu rumput laut dalam menyerap cahaya matahari untuk fotosintesis. Berat bibit merupakan salah satu faktor teknis yang dapat berpengaruh terhadap pertumbuhan rumput laut dan juga jumlah kepadatan disetiap ikatan rumput laut perlu diperhatikan agar tidak terlalu padat sehingga dapat menyebabkan rumput laut rontok.

Different Cultivation Periods and Seedling Sources on the Growth of Kappaphycus alvarezii Cultivated in Pangkep Waters, South Sulawesi, Indonesia

Red algae , Kappaphycus alvarezii (Doty) Doty ex Silva has a high economic value due to its high Kappa-carrageenan contents (Bixler, 1996). However, climate change and improper planting patterns of K. alvarezii lead to lower production. This problem has been reported in countries such as In (Mexico), Fiji and the Philippines. Environmental changes highly affected the growth performance of the seaweed and their biochemical content. The study aimed to investigate the proper season, seed ling sources and strain of seaweed K. alvarezii for cultivation in Pangkep waters. The seaweeds were cultured using long line method. The seaweed was cultivated in Pangkep open waters using the ris rope with the cultivation distance of 20 cm between the seaweed seed ling s. The treatment of study consisted of the red strain (A), including Pangkep (A1), Bone (A2), and Lombok (A3), while the brown strain (B) consisted of the brown strain from Pangkep (B1), Bone (B2), and Lombok (B3), and the green strain (C) consisted of strain from Pangkep (C1), Bone (C2), and Lombok (C3). Seaweeds were cultivated in four periods of time, 1 st period (April - June) and 2 nd period (June – July), 3 rd period (August – September) and 4 th period (September – November). The seaweed was cultivated for 45 days. G rowth rates were determined using the DGR (Daily Growth Rate) . The results showed that the highest growth rate performance of the seaweed in the 1 st period I was observed in the red strain from Lombok (4.2 5 %) and cultivation 2 nd period was obtained in the brown strain from Bone (3. 08 %). The green strain from Bone and Pangkep showed a negative growth rate (- 1. 0 9 % and - 1. 5 9 %) in the same cultivation period. The negative growth rate occurred in all the strain seaweed in 3 rd and 4 th period. Therefore, season and the sources of the seaweed are important to be considered in seaweed cultivation in order to increase seaweed production. Red algae , Kappaphycus alvarezii (Doty) Doty ex Silva has a high economic value due to its high Kappa-carrageenan contents (Bixler, 1996). However, climate change and improper planting patterns of K. alvarezii lead to lower production. This problem has been reported in countries such as In (Mexico), Fiji and the Philippines. Environmental changes highly affected the growth performance of the seaweed and their biochemical content. The study aimed to investigate the proper season, seed ling sources and strain of seaweed K. alvarezii for cultivation in Pangkep waters. The seaweeds were cultured using long line method. The seaweed was cultivated in Pangkep open waters using the ris rope with the cultivation distance of 20 cm between the seaweed seed ling s. The treatment of study consisted of the red strain (A), including Pangkep (A1), Bone (A2), and Lombok (A3), while the brown strain (B) consisted of the brown strain from Pangkep (B1), Bone (B2), and Lombok (B3), and the green strain (C) consisted of strain from Pangkep (C1), Bone (C2), and Lombok (C3). Seaweeds were cultivated in four periods of time, 1 st period (April - June) and 2 nd period (June – July), 3 rd period (August – September) and 4 th period (September – November). The seaweed was cultivated for 45 days. G rowth rates were determined using the DGR (Daily Growth Rate) . The results showed that the highest growth rate performance of the seaweed in the 1 st period I was observed in the red strain from Lombok (4.2 5 %) and cultivation 2 nd period was obtained in the brown strain from Bone (3. 08 %). The green strain from Bone and Pangkep showed a negative growth rate (- 1. 0 9 % and - 1. 5 9 %) in the same cultivation period. The negative growth rate occurred in all the strain seaweed in 3 rd and 4 th period. Therefore, season and the sources of the seaweed are important to be considered in seaweed cultivation in order to increase seaweed production.

The growth of Kappaphycus alvarezii under different depth and initial weight in Talengen waters, Sangihe Islands Regency

The effect of depth and weight differences on early stage of seaweed growth Kappaphycus alvarezi was studied. This Research was conducted for over 42 days, from April to May 2013 in Talengen Waters, Regency Sangihe Islands, North Sulawesi. Experiment designed used was 4 x 3 factorial experiment in a completely randomized design, so there were two factors namely depth and weight. The depth factor (D) consisted of four levels and initial weight (W) consisted of three levels, thus there were 12 treatment combination: D1W1 (25 cm, 75 g), D1W2 (25 cm, 100 g), D1W3 (25 cm, 125 g), D2W1 (75 cm, 75 g), D2W2 (75 cm, 100 g), D2W3 (75 cm, 125 g), D3W1 (125 cm, 75 g), D3W2 (125 cm, 100 g), D3W3 ( 125 cm, 125 g), D4W1 (175 cm, 75 g), D4W2 (175 cm, 100 g), and D4W3 (175 cm, 125 g). Data collected were analyzed statistically using the statistical program JMP (SAS Institute). Statistical analysis showed there was a significant differences in relative growth of seaweed K. alvarezii (P> F.0003 <.01).The best relative growth of seaweed K. alvarezzi was achieved in treatment combination D1W1 (25 cm, 75 gr) as much as 302.89%. Keywords: Seaweed, Kappaphycus alvarezii, relative growth