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The coconut coir dust nutrients suitable for use as organic fertilizer. Nitrogen and phosporus levels in coir dust is still low, so it’s requires additional organic materials, such as goat debris. The purpose of this research was to determine the influence of composting time of coconut coir dust and goat debris mixture on organic fertilizer quality. The study used a Completely Randomized Design with 5 treatments and 5 replications so that 25 units of experiments were obtained, and each treatment added 20 ml EM4 bioactivator. The mixture of coir dust- goat debris consist of: A (80:20), B (60:40), C (50:50), D (40:60), and E (20:80). The peak temperature of composting of organic fertilizer with ratio of coir dust- goat debris 80:20 and 60:40 occured on the 21st-days of composting, while organic fertilizer with ratio of coir dust- goat debris 50:50, 40:60, 20:80 on the 12th days of compositing. Organic fertilizer with ratio of coir dust- goat debris 80:20 and 60:40 during composting time 21 days didn’t in accordance SNI standards (C/N ratio 10-20), namely 21.28 and 21.10. Organic fertilizer with ratio of coir dust- goat debris 80:20 and 60:40 were require longer composting time more than 21 days. Organic fertilizer with ratio of coir dust- goat debris 50:50 and 40:60 that’s unqualified SNI 19-7030-2004 standard at composting time 21 days. Organic fertilizer with ratio of coir dust - goat debris 20:80 on composting that’s 7th, 14th, and 21st days unqualified SNI standard, because C/N ratio do not meet SNI standard (C/N ratio 10-20), that is 28.64, 21.89 and 7.93 respectively. The ideal time of composting for organic fertilizer with ratio of coir dust- goat debris 20:80 between 14 - 21 days. ABSTRAK Debu sabut mengandung unsur hara yang dapat dimanfaatkan sebagai pupuk organik. Kadar N dan P debu sabut masih rendah sehingga membutuhkan tambahan bahan organik lain seperti kotoran kambing. Penelitian ini bertujuan untuk mengetahui pengaruh waktu pengomposan campuran debu sabut kelapa dan kotoran kambing terhadap kualitas pupuk organik. Penelitian menggunakan Rancangan Acak Lengkap dengan lima perlakuan dan lima ulangan sehingga diperolah 25 satuan percobaan dan setiap perlakuan ditambahkan bioaktivator EM4 sebanyak 20 ml. Perlakuan yang diuji adalah komposisi debu sabut (DS)-kotoran kambing (KK) yang terdiri atas A (80:20), B (60:40), C (50:50), D (40:60), dan E (20:80). Suhu puncak pengomposan untuk pupuk organik dengan komposisi DS-KK 80:20 dan 60:40 terjadi pada hari ke-21, sedangkan pupuk organik dengan komposisi DS-KK 50:50, 40:60, dan 20:80 pada hari ke-12. Pupuk organik dengan komposisi DS-KK 80:20 dan 60:40 selama pengomposan 21 hari tidak memenuhi standar SNI (rasio C/N 10-20), yaitu 21,28 dan 21,10. Pupuk organik dengan komposisi DS-KK 80:20 dan 60:40 memerlukan waktu pengomposan yang lebih lama (lebih dari 21 hari). Pupuk organik dengan komposisi DS-KK 50:50 dan 40:60 memenuhi standar SNI 19-70302004 pada waktu pengomposan 21 hari. Pupuk organik dengan komposisi DS-KK 20:80 pada pengomposan 7, 14, dan 21 hari tidak memenuhi standar SNI, karena nilai rasio C/N pupuk E tidak sesuai dengan SNI (rasio C/N 10-20), yaitu masing masing sebesar 28,64, 21,89 dan 7,93. Waktu ideal pengomposan untuk pupuk E antara 14-21 hari.

buletin palma

Pengaruh Rasio Debu Sabut Kelapa dan Kotoran Kambing terhadap Waktu Pengomposan dan Kualitas Pupuk Organik [The Effects of Coconut Coir Dust - Goat Debris Rasio on Composting Time and Organic Fertilizer Quality]