Wood vinegar (WV) was obtained from charcoal production byproducts. The increase in demand for WV as an alternative pesticide requires more production of WV independent of conventional charcoal production. This research was intended to commence the production of WV from available furniture wood waste. The study included the following: (i) the preparation and performance of a pyrolysis kiln; and (ii) the application of the produced WV as a plant growth regulator of papaya plants in the nursery and as a pest insect repellent during maize storage. These experiments were arranged in a randomized block design. The observed variables included pyrolysis rate, the effect of WV on papaya growth in nursery, and the effect of WV in controlling infestation of maize weevils. The data were analyzed using analysis of variance and continued with Duncan's multiple difference test. The results showed that while the production of WV continuously occurred until the 90 th min, the maximum (139 mL) was reached at the 10 th min. Pyrolysis of 1,000 g of chips of wood-planer's waste yielded WV, tar, bio-oil, and char in quantities of 487.67 mL, 41.76 g, 2.93 mL, and 222 g respectively. The treatment using WV (50 mL/L) increased the diameter of papaya stems in the nursery. Mixing and fuming application of 5 mL of WV as a pest insect repellent on 200 g of maize on the storage could increase the number of the dead maize weevil and reduce the damage maize kernel.
Limbah Rumah Potong Hewan (RPH) berpotensi digunakan sebagai pupuk organik. Teknologi yang dapat direkomendasikan untuk pemanfaatan limbah Rumah Potong Hewan adalah pengomposan. Penelitian bertujuan untuk mengkaji pengaruh pupuk organik limbah RPH terhadap kesuburan tanah dan produktivitas padi. Penelitian dilaksanakan di kebun percobaan Fakultas Pertanian Universitas Siliwangi Tasikmalaya dari Mei sampai September 2017. Percobaan menggunakan Rancangan acak kelompok 10 taraf perlakuan diulang 3 kali. Perlakuan kombinasi dosis N,P, K dan pupuk organik (PO), yaitu: A= Dosis N,P,K; B= dosis N,P,K + 2,5 t ha-1 PO; C=Dosis N,P,K + 5 t ha-1 PO; D= Dosis N,P,K + 7,5 t ha-1 PO; E= ¾ dosis N,P,K + 2,5 t ha-1 PO; F= ¾ dosis N,P,K + 5,0 t ha-1 PO; G= ¾ dosis N,P,K + 7,5 t ha-1 PO; H= ½ dosis N,P,K + 2,5 t ha-1 PO; I= ½ dosis N,P,K + 5,0 t ha-1 PO; J= ½ dosis N,P,K + 7,5 t ha-1 PO. Dosis rekomendasi N, P dan K: urea 300 kg ha-1, SP 36 150 kg ha-1, dan KCl 100 kg ha-1. Hasil penelitian menunjukkan bahwa aplikasi pupuk organik 2,5 t ha-1 dan ¾ dosis N, P dan K menghasilkan gabah lebih tinggi dan meningkatkan kesuburan tanah. Slaughterhouse waste is potential to be used as organic fertilizer. The technology recommended for the usage of slaughterhouse waste is composting. This research was aimed to study effect of organic fertilizer slaughterhouse waste on soil fertility and rice productivity. The research was conducted in the experiment site of Agricultural Faculty, Universitas Siliwangi Tasikmalaya from May to September 2017. Randomized block design was used with ten level treatments and replicated three times. The treatment was combination dosage N,P, K and organic fertilizer (OF), namely : A= (N,P,K recommendation dose), B= (N,P,K dose + 2.5 t ha-1 OF), C= (N,P,K dose + 5 t ha-1 OF), D= (N,P,K dose + 7.5 t ha-1 OF), E= (3/4 dose of N,P,K + 2.5 t ha-1 OF), F= (3/4 dose of N,P,K + 5 t ha-1 OF), G= (3/4 dose of N,P,K + 7.5 t ha-1 OF), H=(1/2 dose of N,P,K + 2.5 t ha-1 OF), I= (1/2 dose of N,P,K + 5 t ha-1 OF), J= ( ½ dose of N,P,K + 7.5 t ha-1 OF). The recommendation dose of N, P and K, respectively: urea 300 kg ha-1, SP 36 150 kg ha-1, and KCl 100 kg ha-1. The results showed application organic fertilizer 2,5 t ha-1 dan ¾ dose of N, P, K fertilizer increased yields grain higher and improve soil fertility.
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