Kualitas Pupuk Frass Samia cynthia ricini dengan Pemberian Pakan Daun Jarak Kepyar Menggunakan Aktivator Berbeda

Abstract

Limbah frass ulat sutra eri (Samia cynthia ricini) kurang dimanfaatkan, pemeliharaan 20.000 – 25.000 larva menghasilkan frass sekitar 500 kg. Frass dapat digunakan sebagai bahan pupuk organik untuk meningkatkan unsur hara tanah. Penelitian ini bertujuan menganalisis kualitas pupuk frass ulat sutra eri dengan pemberian pakan daun jarak kepyar dengan aktivator EM4 dan PGPR. Peubah yang diamati dari pupuk frass dengan penambahan EM4 dan PGPR, yaitu sifat fisik dan kimia selama 21 hari yang diamati pada hari ke-0, 7, 14, dan 21, serta uji efektivitas pupuk frass pada tanaman kangkung selama 28 hari. Hasil penelitian menunjukkan sifat fisik pupuk frass memenuhi standar SNI pada pH berkisar 4-9, tekstur remah, dan aroma sedikit asam. Penambahan EM4 dan PGPR meningkatan unsur N dan K, sedangkan P dan rasio C/N mengalami penurunan. Penggunaan pupuk frass pada tanaman kangkung menunjukkan hasil tidak berbeda nyata (P>0,05) terhadap tinggi tanaman, diameter batang, jumlah daun, dan bobot segar. Pupuk frass berpotensi menggantikan pupuk kimia berdasarkan peubah yang diamati.

Eri silkworm (Samia cynthia ricini) frass waste is underutilized, rearing 20,000 – 25,000 larva produces around 500 kg of frass. Frass can be used as an organic fertilizer to increase soil nutrients. This research aims to analyze the quality of eri silkworm frass fertilizer by feeding it with castor leaves with EM4 and PGPR activators. The variables observed from frass fertilizer with the addition of EM4 and PGPR, included the physical and chemical properties for 21 days which were observed on days 0, 7, 14, and 21, as well as testing the effectiveness of frass fertilizer on water spinach plants for 28 days. The research results show that the physical properties of frass fertilizer meet SNI standards at a pH ranging from 4-9, a crumbly texture, and a slightly sour aroma. The addition of EM4 and PGPR increased the N and K elements, while P and the C/N ratio decreased. The use of frass fertilizer on water spinach plants showed that the results were not significantly different (P>0.05) on plant height, stem diameter, number of leaves and fresh weight. Frass fertilizer has the potential to replace chemical fertilizer based on the observed variables.