Aplikasi serbuk daun mangrove (Rhizopora sp.) sebagai pengawet alami tali rami pada alat tangkap jaring ikan: Application of mangrove leaves powder (Rhizopora sp.) as a natural preservative for hemp rope in fishing gear

Abstract

Indonesian

Tali rami adalah bahan yang digunakan untuk membuat jaring pada alat tangkap. Sifat tali rami yang mudah busuk dan masa pakai yang singkat membuat tali ini kurang diminati oleh nelayan. Bahan pengawet digunakan untuk menambah usia pakai tali rami, salah satunya adalah daun mangrove. Penelitian ini bertujuan untuk menentukan pengaruh aplikasi serbuk daun mangrove Rhizophora sp. sebagai pengawet tali rami berdasarkan parameter kemuluran benang dan kuat putus. Daun mangrove Rhizophora sp. yang digunakan jenis daun muda dengan warna hijau tidak pekat. Serbuk daun mangrove Rhizophora sp. dianalisis proksimat dan fitokimia. Pengawetan tali rami terdiri atas perlakuan tanpa perendaman serbuk daun Rhizophora sp. (kontrol) dan perendaman 0,3; 0,5; 0,7; dan 0,9 kg/L. Hasil penelitian menunjukkan bahwa serbuk daun mangrove Rhizophora sp. memiliki kadar air 6,31±0,06%; lemak 0,66±0,05%; abu 8,28±0,10%; protein 8,74±0,04%; serat kasar 15,25±0,05%; dan karbohidrat 65,76±0,05%. Serbuk daun mangrove Rhizophora sp. terdeteksi mengandung senyawa fenol, alkaloid, flavonoid, tanin, dan saponin. Perbedaan konsentrasi perendaman serbuk daun mengrove dapat memengaruhi (p<0,05) kuat putus basah, namun pada parameter lainnya (kadar air, kemuluran benang basah-kering), kuat putus kering dengan pemberian serbuk daun mangrove pada rentang konsentrasi 0,3-0,9 kg/L tidak berpengaruh signifikan.

English

The hemp rope is used to create nets for fishing equipment. The unappealing characteristics of the hemp rope, including its propensity for decay and limited lifespan, render it a less desirable choice for fishermen. The use of preservatives in hemp ropes is intended to prolong their lifespan. One such preservative is the mangrove leaves, which have been found to be effective in this regard. This study aimed to investigate the impact of utilizing mangrove leaf powder from Rhizophora sp. as a preservative for hemp rope with respect to thread elongation and breaking strength. The leaves utilized were young, non-dark green hues. The proximate and phytochemical characteristics of the mangrove leaf powder were examined. Preserving hemp rope involves treating it without soaking it in Rhizophora sp. leaf powder and immersing it in solutions at concentrations of 0.3, 0.5, 0.7, and 0.9 kg/L. According to the data, the water content of mangrove leaf powder from Rhizophora sp. was found to be 6.31 ± 0.06%, the fat content was 0.66 ± 0.05%, the ash content was 8.28 ± 0.10%, the protein content was 8.74 ± 0.04%, the crude fiber content was 15.25 ± 0.05%, and the carbohydrate content was 65.76 ± 0.05%. The presence of phenolic compounds, alkaloids, flavonoids, tannins, and saponins in Rhizophora sp. mangrove leaf powder has been identified.Pertaining to the application of mangrove leaf powder, the concentration level can impact the wet breaking strength, as indicated by a significance level of p<0.05. However, in terms of other factors such as moisture content and wet-dry elongation of the thread, the effect on the dry breaking strength appeared to be insignificant within the concentration range of 0.3-0.9 kg/L.

Keywords

• breaking strength
• elongation
• phytochemical
• proximate
• fitokimia
• kemuluran
• kuat putus
• proksimat