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All Journal Jurnal Ilmiah Rekayasa Pertanian dan Biosistem Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Jurnal Agricultural Biosystem Engineering
Oktafri Oktafri
Universitas Lampung
Agriculture, Biological Sciences & Forestry Automotive Engineering Civil Engineering, Building, Construction & Architecture Engineering Environmental Science Materials Science & Nanotechnology

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UNJUK KERJA MESIN PEMOTONG PADI (PADDY MOWER) SAAT PEMANENAN PADI (Oryza sativa L.) DI LAHAN BASAH Siti Anisa; Siti Suharyatun; Oktafri Oktafri; Sandi Asmara
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 7, No 2 (2018): Agustus
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1029.438 KB) | DOI: 10.23960/jtep-l.v7i2.97-105

Abstract

Pemanenan padi secara tradisional memerlukan banyak tenaga pemanen.  Penggunaan alat pemanen tradisional juga menjadi salah satu penyebab kehilangan hasil panen yang cukup tinggi.  Penggunaan alat mesin pemanen padi dapat dilakukan untuk memecahkan permasalahan tersebut.  Salah satu alternatif mesin yang dapat digunakan untuk memanen padi di lahan yang sempit/bergelombang adalah mesin pemotong padi (paddy mower).  Tujuan dari penelitian ini untuk mengetahui kapasitas kerja mesin, kebutuhan bahan bakar,  tingkat kehilangan padi (losses), serta analisis ekonomi penggunaan mesin pemotong padi tipe GLX 328-RH untuk pemanenan. Penelitian ini terdiri dari tiga tahapan utama, yaitu persiapan mesin dan lahan sawah di pekon Talang Padang, Kabupaten Tanggamus, pengujian performansi mesin dan analisis data.  Parameter yang diamati adalah kapasitas kerja mesin, persentase kehilangan gabah, dan konsumsi bahan bakar. Hasil penelitian menunjukan bahwa kapasitas kerja mesinpaddy mower dengan kecepatan pemotongan RPM 3863 (0,015 ha/jam) dan RPM 5000 (0,029 ha/jam) lebih tinggi dibandingkan dengan sabit (0,011 ha/jam).  Meningkatnya kecepatan pemotongan cenderung menurunkan losses gabah.  Losses pada RPM 1824 = 1,44%, RPM 3863 = 1,12 % dan RPM 5000 = 0,66%.  Konsumsi bahan bakar yang dibutuhkan pada RPM 1824 = 95,83 l/ha, RPM 3863 = 56,83 l/ha dan RPM 5000 = 42,83 l/ha.  Nilai Break Event Point (BEP) penggunaan mesin paddy mower sebesar 2,27 ha/thn.  NPV mesin paddy mower sebesar Rp. 2.881.194,18/thn, B/C Ratio mesin paddy mower sebesar 1,10, dan IRR mesin paddy mower sebesar 83,98%.Kata Kunci:Padi, Mower, Unjuk Kerja Mesin, Losses, Kapasitas Kerja
Effect of Coconut Shell Biochar Application on the Effectivity of NPK Fertilizer in Red Onion (Allium ascalonicum L.) Cultivation Agata Desinta Yoanma; Agus Haryanto; Oktafri Oktafri; Sugeng Triyono
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 11, No 1 (2022): March
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v11i1.1-14

Abstract

Shallot cultivation in Lampung faces challenges because the land is dominated by ultisol soils, which have low nutrients. Therefore, soil improvement materials such as biochar and fertilizers are needed. This study aims to determine the effect of coconut shell biochar addition on the effectiveness of NPK fertilizer in the production of shallots. The study was arranged in a Factorial Completely Randomized Design consisting of 2 factors, namely the dose of biochar (0, 40, 80, and 120 g/pot) and the dose of NPK fertilizer (0, 0,8, 1,6, and 2,4 g/pot). Each treatment combination was repeated 3 times. Parameters included soil characteristics (pH, soil volume shrinkage) and plant parameters (plant height, number of leaves, canopy area, buld number and diameter, evapotranspiration, fresh root weight, bulb air dry weight, and water productivity. The results showed that coconut shell biochar had a significant effect (α = 0.05) in increasing soil pH and decreasing soil shrinkage. The dose of biochar 80 g/pot (B2) with a dose of NPK 1.6 g/pot (N3) was the best treatment. In this treatment combination, shallots produced an average weight of 120.54 g/pot of fresh stover, 14 bulbs with diameter of 2.05 cm and air dry bulb weight of 70.17 g/pot, and the water productivity of 18.22 kg/m3. Keyword: Canopy area, Fertilizer dose, pH, Soil shrinkage, Water productivity
Uji Kinerja Portable Rainfall Simulator pada Berbagai Tekanan Pompa Ridwan Ridwan; Oktafri Oktafri; Muhammad Amin; Maya Ardila
Jurnal Agricultural Biosystem Engineering Vol 1, No 3 (2022): September 2022
Publisher : abe.fp.unila.ac.id

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Rainfall simulator is a tool that allows you to create artificial rain simulation as you wish.  Rainfall simulator can be used to study runoff, erosion, infiltration, and other events in hydrological processes on a laboratory scale.  The purpose of the study was determine the performance of the portable rainfall simulator that had been made with test parameters, namely the discharge radiance value, nozzle constanta, and uniformity coefficient.  The test carried out using three variatons of pump pressure treatment, namelay 1.0, 1.3, and 1.6 bar and each treatment was repeated 3 times with a test time of 7.5 minutes.  The test result show that the portable rainfall simulator can produce water discharge with uniformity level (CU) greather than 70%.  The best pump pressure for the highest uniformity of transmission is 1.6 bar. The pumping pressure affects the water discharge with a uniformity coefficient value (CU), the greather the pump pressure, the greather the water discharge value, and the uniformity coefficient value (CU). The type of nozzle used is good enough to be used as a transmitter from the rainfall simulator that was made. Keywords: Coefficient Uniformity (CU), Discharge, Nozzle, Rain, Rainfall Simulator, Water.
APLIKASI IRIGASI BERSELANG (INTERMITTENT IRRIGATION) PADA BUDIDAYA TANAMAN PAK CHOI (BRASSICA RAPA L.) DENGAN MEDIA TANAM PADATAN DIGESTAT DAN TANAH Ahmad Rifki Maulana; Oktafri Oktafri; Ahmad Tusi
Jurnal Ilmiah Rekayasa Pertanian dan Biosistem Vol 6 No 1 (2018): Jurnal Ilmiah Rekayasa Pertanian dan Biosistem
Publisher : Fakultas Teknologi Pangan & Agroindustri (Fatepa) Universitas Mataram dan Perhimpunan Teknik Pertanian (PERTETA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (747.398 KB) | DOI: 10.29303/jrpb.v6i1.74

Abstract

The aim of this research is to know the effectiveness of intermittent irrigation and water productivity analysis, analysis of optimum irrigation interval on plant material of mixed solids of digestat and soil mixture, analysis of optimum combination of digestat solid and soil for plant, and growth and yield analysis Pak Choi plant production. The research was conducted at Greenhouse Plastic Department of Agricultural Engineering Faculty of Agriculture, University of Lampung in November 2016 until December 2016. This research uses two factors of observation, namely Composition of Planting Media and Interval of Irrigation Time. This research used 4 mixed treatment of plant media composition, that is D0 (Digestat 0%: Soil 100%), D1 (Digestat 20%: Soil 80%), D2 (Digestat 40%: Soil 60%), and D3 (Digestat 60% : Soil 40%). Each mixture of media was done 3 repetitions, so that 12 pots were observed. The results showed that the combination of planting medium D1 (Digestat 20%: 80% soil) resulted in a high enough on pak choi of 122.7 grams, while for treatment result D0, D2 and D3 there was a less significant difference. The provision of irrigation water with intermittent irrigation does not significantly affect the growth and yield of Pak choi plant. Longer water delivery intervals still provide a good effect on the results of pak choi plant production due to the addition of solid digestat on the planting medium. The highest water use productivity was achieved by treatment D1 with an average of 774 g /m3. Keywords : Digestat, Intermittent Irrigation, Media Planting, and Pak Choi.
Co-Authors Agata Desinta Yoanma Agus Haryanto Ahmad Rifki Maulana Ahmad Tusi Maya Ardila Muhammad Amin Ridwan Ridwan Sandi Asmara Siti Anisa Siti Suharyatun Sugeng Triyono