PEMANFAATAN LIMBAH PADAT (EUCHEUMA SP) INDUSTRI PENGOLAHAN SEMI-REFINED KARAGENAN SEBAGAI PUPUK CAIR PADA TANAMAN HORTIKULTURA

Abstract

Seaweed waste has prospects as liquid fertilizer because it contains growth regulator hormon, and a number of macro and micro nutrients. This research aims to utilize seaweed thallus pieces (Eucheuma sp) as a material for making liquid fertilizer for horticultural crops. Stages of the research were: the manufacture of fermentor tank, preparation of raw materials and formulas, fermentation process, testing and applying fertilizer to the plants. Liquid fertilizer formula consists of 90%, 85%, 80%, 75%, and 70% thallus of seaweed (Eucheuma sp) plus EM4 solution and shrimp paste solution. The fermentation process is carried out in a semi-anaerobically for 30 days. The results showed that liquid fertilzer with the best formula was from the fermentation process with 85% thallus seaweed (Eucheuma sp), 10% EM4 solution, and 5% shrimp paste solution. The best formula has contains auxin 150.94, gibberellins 178.55, cytokinin consisted of kinetin 105.98 and zeatin 127.04), pH 7.15, does not contain patogenic bacteria and has a faster plant growth rate than the other treatments. Despite having a high growth regulator hormon content compared to commercial fertilizer however, micro and macro nutrient elements are still low and does not complied with standards