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DWI AGUSTINA

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Abstrak (Bhs. Indonesia)

Latar belakang. Penelitian bertujuan untuk mengetahui suhu dan pH kompos yang optimal dengan lama pengomposan selama 28 hari. Penelitian ini dilaksanakan pada 19 November – 18 Desember 2023 dalam magang Merdeka Belajar Kampus Merdeka (MBKM) Program Penguatan Kapasitas Organisasi Mahasiswa (PPK Ormawa) yang diinisiasi oleh Direktorat Pembelajaran dan Kemahasiswaan, Direktorat Jenderal Pendidikan Tinggi, Riset dan Teknologi. Materi dan Metode. Materi penelitian adalah feses kambing 1000 kg, aktivator vit animal sebanyak 2,5 kg, serbuk gergaji sebanyak 50 kg, abu kayu sebanyak 50 kg, kapur dolomit sebanyak 20 kg, dan air secukupnya. Alat yang digunakan adalah 1 unit chopper, 2 unit cangkul, 2 unit sekop, 1 unit timbangan, 1 unit termometer, dan 1 unit soil tester. Metode penelitian adalah eksperimental dengan rancangan penelitian Rancangan Acak Lengkap (RAL) dilanjutkan dengan uji Ortogonal Polinomial dimana lama pengomposan sebagai perlakuan yaitu 0 hari, 7 hari,14 hari, 21 hari, dan 28 hari sehingga terdapat 5 perlakuan dan terdapat 4 ulangan. Hasil. Hasil rataan suhu kompos masing-masing perlakuan yaitu 33oC ± 0,82 ; 35,5 oC ±1,29 ; 39,25 oC ±0,96 ; 36 oC ±0,82 dan 31,5 oC ±1,29 sedangkan rataan pH kompos masing-masing perlakuan yaitu 5,3±0,10 ; 5,5±0,15; 5,7± 0,18 ; 6,4± 0,22 ; 7,3±0,08. Hasil analisis variansi menunjukan bahwa lama pengomposan yang berbeda berpengaruh sangat nyata terhadap suhu dan pH (P<0,01). Hasil uji lanjut ortogonal polinomial suhu pengaruhnya bersifat kuadrater dengan persamaan garis Y = 32,55 + 0,8214X – 0,0306X2 dengan titik balik (13,42; 38,06) begitu juga dengan pH pengaruhnya bersifat kuadrater dimana persamaan garis Y = 5,3364 – 0,0068X + 0,0028X2 dengan titik balik (1,21; 5,33). Simpulan. Suhu kompos yang optimal dicapai pada 31,50 C dan pH kompos yang optimal dicapai pada 7,3.

Abtrak (Bhs. Inggris)

Introduction. The study aims to determine the optimal compost temperature and pH with a composting duration of 28 days. This research was carried out on November 19 – December 18 2023 in the Merdeka Belajar Kampus Merdeka (MBKM) internship Student Organization Capacity Strengthening Program (PPK Ormawa) initiated by the Directorate of Learning and Student Affairs, Directorate General of Higher Education, Research and Technology. Materials and Methods. The research materials were goat feces as much as 1000 kg, animal vit activator as much as 2.5 kg, sawdust as much as 50 kg, wood ash as much as 50 kg, dolomite lime as much as 20 kg, and enough water. The tools used are 1 unit of chopper, 2 units of hoes, 2 units of shovels, 1 unit of scales, 1 unit of thermometer, and 1 unit of soil tester. The research method is experimental with a Complete Randomized Design (RAL) research design followed by a Polynomial Orthogonal test where the duration of composting as a treatment is 0 days, 7 days, 14 days, 21 days, and 28 days so that there are 5 treatments and there are 4 repeats. Result. The average compost temperature of each treatment is 33 OC ± 0.82; 35.5 OC ±1.29 ; 39.25 OC ±0.96 ; 36 OC ±0.82 and 31.5 OC ±1.29 while the average pH of each compost treatment is 5.3±0.10; 5.5±0.15; 5.7± 0.18 ; 6.4± 0.22 ; 7.3±0.08. The results of the variance analysis showed that different composting durations had a very significant effect on temperature and pH (P<0.01). The results of further orthogonal polynomial tests of temperature influence are quadratic with the equation of line Y = 32.55 + 0.8214X – 0.0306X2 with turning points (13.42; 38.06) as well as pH the effect is quadratic where the equation of line Y = 5.3364 – 0.0068X + 0.0028X2 with turning points (1.21; 5.33). Conclusion. The optimum compost temperature is achieved at 31.5 OC and the optimum compost pH is achieved at 7.3.

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