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Jurnal Keteknikan Pertanian Tropis dan Biosistem
Published by Universitas Brawijaya
ISSN : -     EISSN : 2656243X     DOI : https://doi.org/10.21776/ub.jkptb
Core Subject : Science, Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Control & Systems Engineering Electrical & Electronics Engineering Energy Mechanical Engineering
Jurnal Keteknikan Pertanian Tropis dan Biosistem (JKPTB) (ISSN: 2656-243X) has published the state-of-art articles which focus on both fundamental studies and applied engineering including Power and Agricultural Machinery, Mechatronics and Agro-industrial Machinery, Food and Post-Harvest Technology and Soil and Water Engineering. By providing an update issue and current topic in agricultural technology field, JKPTB becomes the reference for many scientist and stakeholders who work on Agricultural Engineering
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 423 Documents
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Implementasi Sistem Kontrol PID pada Kotak Penyimpanan Buah Alpukat berbasis Raspberry Pi Pico W Hafizulhaq, Fadli; Harahap, Wenti; Imanuela, Claresta; Chatib, Omil Charmyn; Putri, Renny Eka
Journal of Tropical Agricultural Engineering and Biosystems - Jurnal Keteknikan Pertanian Tropis dan Biosistem Vol. 13 No. 1 (2025): April 2025
Publisher : Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jkptb.2015.013.01.06

Abstract

Alpukat merupakan buah klimakterik yang cepat rusak jika disimpan pada suhu ruang. Salah satu cara memperpanjang umur simpan alpukat adalah menyimpannya pada suhu dingin. Penelitian ini memiliki fokus membuat kotak penyimpanan buah dengan menggunakan pendingin termoelektrik atau elemen peltier. Kotak dibuat dengan sistem kontrol PID dengan menggunakan mikrokontroler Raspberry Pi Pico W. Hasil pengujian menunjukkan bahwa kontrol PID berhasil mempertahankan temperatur kotak pada 23 °C atau lebih rendah. Temperatur dapat dipertahankan hingga 1 jam pada kondisi kotak tanpa beban. Saat diberikan beban, temperatur kotak terendah yang dapat dicapai adalah 25.9 °C disebabkan karena beban buah alpukat memproduksi energi panas dari proses respirasi. Percobaan dengan beban juga mengonsumsi arus lebih besar dari pada percobaan tanpa beban.
Study on the Effectiveness of Slow-Release Fertilizer Combining Maggot waste and Azospirillum brasilense on the Growth of Choy Sum (Brassica rapa var. parachinensis) Wijaya, Alvin Bowen; Kusuma, Achmad Fauzi; Pangestu, Clive Nathan; Jocelino, Vincenzio; Akbar, Verga Windi; Ali, Dego Yusa
Journal of Tropical Agricultural Engineering and Biosystems - Jurnal Keteknikan Pertanian Tropis dan Biosistem Vol. 13 No. 1 (2025): April 2025
Publisher : Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jkptb.2025.013.01.04

Abstract

The use of conventional fertilizers is a major contributor to nitrogen leaching in agriculture. The development of Slow-Release Fertilizers (SRF) has garnered increasing attention due to their ability to control nutrient release. However, current SRF formulations still rely on costly and environmentally unfriendly chemical substrates. The application of SRF using organic maggot waste fertilizer combined with the Plant Growth-Promoting Rhizobacteria (PGPR) Azospirillum brasilense shows potential to rival commercial SRF quality. Maggot waste has been shown to contain NPK levels comparable to commercial fertilizers, while A. brasilense has demonstrated the ability to induce plant growth hormones. This study investigates SRF synthesized with varying amounts of maggot waste and A. brasilense suspension, focusing on SRF characteristics and their effect on the growth of choy sum (Brassica rapa var. parachinensis). All SRF treatment groups exhibited high water absorption and sustained nutrient release for up to 30 days, aligning with the choy sum growth period. The synthesized SRF showed the highest compatibility with the Ritger–Peppas kinetic release model (R² > 0.97), indicating a quasi-Fickian diffusion mechanism. However, the combination of SRF and A. brasilense did not significantly enhance plant growth (p > 0.05) in terms of fresh weight, total leaf area, and leaf count. Further research is needed to optimize SRF formulations for more effective and efficient application in agriculture.
Characterization of Activated Carbon from Coffee Husk Using Potassium Hydroxide (KOH) as an Activator Putra , Tamam Athallah Rhely; Yunira, Eka Nur'azmi; Pratama, Borneo Satria; Witoyo, Jatmiko Eko; Pangestuti , Martasari Beti; Putra, Endo Pebri Dani; Nugraha, Aditya Wahyu; Devita, Wilda Harlia
Journal of Tropical Agricultural Engineering and Biosystems - Jurnal Keteknikan Pertanian Tropis dan Biosistem Vol. 13 No. 1 (2025): April 2025
Publisher : Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jkptb.2025.013.01.01

Abstract

Coffee husk is an agricultural by-product of coffee production, and its utilization is still limited. So, the study focuses on the potential of coffee husk to be turned into activated carbon. An essential step in producing activated carbon is activation, primarily performed using chemical solvents, such as potassium hydroxide (KOH). However, there are still limited studies on the effect of KOH concentration on the activation of charcoal from coffee husk. Therefore, the study aims to determine the impact of potassium hydroxide (KOH) concentrations on the characteristics of activated carbon derived from coffee husk. The KOH concentration ranges used to activate charcoal were 0 M (as control), 1 M, and 2 M, and were conducted using the completely randomized design (CRD) approach. The characteristics of the activated carbon were analyzed according to the SNI 06-3730-1995 standard, including moisture content, ash content, volatile matter content, and bonded carbon content. The results indicated that KOH concentration significantly impacted the characteristics of activated carbon derived from coffee husk.
Potential of Functional Food Fortified Alfalfa (Medicago sativa L.) in Fermented Milk Products: A Literature Review Nasihin, Ahmad; Fadhlurrohman, Irfan
Journal of Tropical Agricultural Engineering and Biosystems - Jurnal Keteknikan Pertanian Tropis dan Biosistem Vol. 13 No. 1 (2025): April 2025
Publisher : Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jkptb.2025.013.01.05

Abstract

Alfalfa (Medicago sativa L.) is an herbal plant rich in nutrients such as vitamins, minerals, proteins, and bioactive compounds. Many bioactive compounds contained in alfalfa are flavonoids and phytosterols, making it an ideal ingredient for food fortification. Although it has been widely used in food products, its use in fermented dairy products is still very rare. This literature review aims to explore the potential of alfalfa as a fortifying ingredient for fermented milk products by reviewing various literature related to alfalfa and milk fortification. The literature search method was conducted through various academic databases such as Google Scholar, Scopus, PubMed, and ScienceDirect. The literature search used keywords consisting of “alfalfa”, “milk fortification”, “functional food”, and “fermented dairy products”. The literature review results show that alfalfa can be fortified into fermented dairy products such as yoghurt and kefir. Alfalfa can enhance nutritional content, optimize the fermentation process, and increase the functional value of fermented dairy products, which can support body health, maintain the immune system, and potentially reduce cancer. Additionally, alfalfa has been shown to extend the shelf life of products due to its antimicrobial and antioxidant properties, which inhibit the growth of pathogenic microorganisms. Challenges such as antinutritional content and the impact of alfalfa on the organoleptic and sensory characteristics of fermented dairy products can be addressed through appropriate processing methods with optimal dosing, resulting in products that not only meet basic nutritional needs but also provide positive health effects and are acceptable to consumers. Functional food innovations resulting from alfalfa fortification have great opportunities for developing fermented dairy products with higher functional values to meet consumers' demand for a variety of health-beneficial foods.
Modifikasi dan Evaluasi Prototipe Perontok Biji Pokem (Setaria Italica. L) Untuk Penanganan Pascapanen Pokem Sebagai Salah Satu Pangan Lokal Papua Payung, Paulus; Darma, Darma; Sarungallo, Zita L.; Santoso, Budi
Journal of Tropical Agricultural Engineering and Biosystems - Jurnal Keteknikan Pertanian Tropis dan Biosistem Vol. 13 No. 1 (2025): April 2025
Publisher : Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jkptb.2025.013.01.07

Abstract

Pokem merupakan sebutan lokal dari gandum Papua yang memiliki kandungan gizi yang tinggi terutama karbohidrat, sehingga dapat dimanfaatkan sebagai sumber pangan di Papua khususnya di Pulau Numfor. Produksi pokem di Papua masih tergolong rendah karena pengolahan pascapanen yang dilakukan masyarakat pembudidaya tanaman pokem masih tradisional atau manual sehingga penanganan pascapanen pokem belum maksimal. Telah dirancang alat perontok biji pokem sebelumnya namun kapasitas perontokan masih rendah dan kehilangan masih tinggi, sehingga perlu dilakukan perbaikan pada bagian fungsional. Tujuan penelitian ini adalah memodifikas perontok biji pokem dan evaluasi kinerja. Parameter yang di ukur adalah: Rendemen, kapasitas dan kehilangan perontokan pada putaran 900 rpm. Hasil dari penelitian ini adalah terbentuknya suatu prototipe perontok biji pokem yang telah berfungsi sebagai suatu sistem perontok biji pokem dengan kinerja: rata-rata rendemen perontokan 84.14%, rata-rata kapasitas perontokan 66.26 kg/jam dan rata-rata kehilangan 5.28%. Perontok yang telah dimodifikasi mampu meningkatkan kapasitas perontokan dan menekan kehilangan biji pokem sehingga lebih efektif digunakan untuk perontokan biji pokem.
Analisis Kelayakan Finansial Usaha Jual Beli Buah Kelapa Sawit di Desa Mahato Kabupaten Rokan Hulu Eliyana, Isnani; Yusmini, Yusmini; Edwina, Susy
Journal of Tropical Agricultural Engineering and Biosystems - Jurnal Keteknikan Pertanian Tropis dan Biosistem Vol. 13 No. 1 (2025): April 2025
Publisher : Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jkptb.2025.013.01.08

Abstract

Usaha jual beli Tandan Buah Segar (TBS) kelapa sawit merupakan sektor penting yang menunjang perekonomian daerah pedesaan, khususnya daerah penghasil kelapa sawit seperti Desa Mahato, Kecamatan Tambusai Utara, Kabupaten Rokan Hulu. Prospek bisnis usaha jual beli TBS yang tinggi membuat persaingan antar pedagang semakin meningkat. Penelitian ini bertujuan untuk mengevaluasi kelayakan finansial usaha perdagangan TBS dengan menggunakan kriteria investasi dan menganalisis sensitivitas usaha perdagangan TBS terhadap persaingan antar pedagang. Metode yang digunakan dalam penelitian ini adalah studi kasus, yang hanya berfokus pada satu usaha yaitu usaha TBS Bapak Susanto yang memiliki penjualan mencapai 200 ton per bulan. Data yang digunakan pada penelitian ini adalah data primer dan data sekunder. Analisis data menggunakan tiga kriteria investasi yaitu Net Present Value (NPV), Internal Rate of Return (IRR), dan Net Benefit Cost Ratio (Net B/C). Hasil analisis menunjukkan bisnis jual beli TBS Bapak Susanto layak untuk dilanjutkan jika dilihat aspek finansial. Kelayakan ini dinilai dari NPV positif yaitu sebesar Rp 4,819,481,521, IRR sebesar 83.98% lebih tinggi dari tingkat suku bunga (SOCC) yang digunakan, dan nilai Net B/C yang diperoleh lebih dari satu (Net B/C>1) yaitu sebesar Rp 9.23, yang artinya setiap pengeluaran Rp 1, maka akan menghasilkan penerimaan (benefit) sebesar Rp 9.23. Analisis sensitivitas terhadap penurunan produksi TBS kelapa sawit petani mitra yang pernah terjadi yaitu sebesar 360,000 kg/tahun atau 360 ton/tahun menunjukkan bahwa usaha jual beli TBS Bapak Susanto masih layak untuk dijalankan.
Pertumbuhan dan Hasil Produksi Dua Varietas Tanaman Kale pada Penambahan Spektrum Cahaya dan Lama Penyinaran Light Emitting Diode (LED) Asyar, Ahmad Wildan; Budiman; Sugeru, Herik; Samudra, Bagas Elang
Journal of Tropical Agricultural Engineering and Biosystems - Jurnal Keteknikan Pertanian Tropis dan Biosistem Vol. 13 No. 1 (2025): April 2025
Publisher : Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jkptb.2025.013.01.09

Abstract

Kale memerlukan pencahayaan minimal 14-16 jam setiap hari untuk pertumbuhan yang optimal, sehingga cahaya dapat memengaruhi fase vegetatif dan kualitas keseluruhan tanaman kale. Tujuan penelitian ini adalah untuk mendapatkan spektrum cahaya dan lama penyinaran yang memberikan hasil optimal terhadap pertumbuhan dan hasil produksi dua varietas tanaman kale. Penelitian dilakukan di Greenhouse UG Technopark pada bulan April-Juni 2024 menggunakan Rancangan Kelompok Lengkap Teracak (RKLT) Pola Tersarang (Nested Design) yang terdiri dari dua faktor yaitu faktor I (petak utama) adalah spektrum cahaya dan lama penyinaran (L) terdiri dari 10 taraf. Faktor II (anak Petak) yang tersarang pada spektrum cahaya dan lama penyinaran adalah jenis varietas kale (V) terdiri dari 2 taraf. Perlakuan diulang sebanyak 4 ulangan. Parameter yang diamati adalah tinggi tanaman (cm), lebar daun (cm), jumlah daun (helai), laju pertumbuhan tinggi tanaman (cm/hari), diameter batang (cm), bobot segar tanaman (g), dan bobot kering tanaman (g). Data yang diperoleh dianalisis menggunakan analisis sidik ragam (ANOVA) dan selanjutnya perlakuan yang pengaruhnya nyata akan dianalisis uji lanjut dengan uji Duncan’s Multiple Range Test (DMRT) pada taraf a = 5%. Hasil penelitian menunjukkan bahwa perlakuan spektrum cahaya dan lama penyinaran berpengaruh nyata terhadap tinggi tanaman, lebar daun, jumlah daun, bobot segar tanaman, dan bobot kering tanaman, sedangkan perbedaan varietas berpengaruh nyata terhadap tinggi tanaman, lebar daun, laju pertumbuhan tinggi tanaman, dan diameter batang.
Evaluation of Spreadable Cheese Made with Goat’s Milk and Soymilk in Various Rations Arief, Muhammad Fajrul; Manab, Abdul; Agustin, Lia
Journal of Tropical Agricultural Engineering and Biosystems - Jurnal Keteknikan Pertanian Tropis dan Biosistem Vol. 13 No. 1 (2025): April 2025
Publisher : Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jkptb.2025.013.01.03

Abstract

This study aimed to determine the characteristics of spreadable cheese made from goat milk (GM) and soy milk (SM) in various rations. The ratios of GM and SM were P0 (control), P1 (3:1), P2 (1:1), and P3 (1:3) (v/v), respectively. P0 was the treatment without adding SM. This study was conducted using a completely randomized design with 4 replications. All data were processed using ANOVA and DMRT. The results showed that the combination of milk reduced saturated fatty acids, which affected the levels of water, fat, casein, and calcium (p < 0.05), but not significantly on salt, protein, and pH levels. The sensory quality assessment was observed using a hedonic test and expressed in histogram form. To conclude, spreadable cheese produced from various rations of GM and SM has sufficient flavor-creamy, as well as good spreadability and color.
Populasi Mikroba Tanah Rhizosfer Tanaman Jagung Akibat Pemberian Berbagai Jenis Bahan Organik Serta Pengaruhnya Terhadap Pertumbuhan Tanaman Azzahra', Shabrina Anis Salwa; Susilowati, Lolita Endang; Sutriono; Suriadi, Ahmad
Journal of Tropical Agricultural Engineering and Biosystems - Jurnal Keteknikan Pertanian Tropis dan Biosistem Vol. 13 No. 1 (2025): April 2025
Publisher : Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jkptb.2025.013.01.10

Abstract

Jumlah populasi mikroorganisme tanah sering menjadi tolak ukur kesuburan tanah. Hal ini dikarenakan mikroorganisme tanah memiliki banyak peran dalam menjaga keberlangsungan sistem di dalam tanah, diantaranya berfungsi sebagai katalis biokimia dalam proses-proses yang berlangsung di dalam tanah. Di sisi lain, Indonesia mengalami penurunan kualitas lahan hingga 25.1% yang sering kali disebabkan oleh penggunaan pupuk anorganik yang berlebihan. Dari hal tersebut bahan organik dapat menjadi masukan tambahan dalam upaya perbaikan tanah. Penelitian ini dilakukan untuk mengetahui pengaruh pemberian jenis bahan organik terhadap jumlah populasi bakteri dan jamur di rizosfer tanaman jagung dan mengetahui keterkaitannya dengan pertumbuhan tanaman. Metode yang digunakan dalam penelitian ini adalah percobaan lapangan dengan menggunakan Rancangan Acak Kelompok (RAK) dengan 18 perlakuan. Penelitian dilanjutkan dengan melakukan analisis tanah di laboratorium. Berdasarkan hasil penelitian, diperoleh bahwa perlakuan Pupuk kandang dosis 10 ton/ha dan Vermikompos dosis 10 ton/ha merupakan perlakuan dengan populasi bakteri terbaik, sedangkan populasi jamur terbaik diperoleh dari perlakuan Vermikompos dosis 10 ton/ha dan kombinasi Vermikompos dosis 5 ton/ha dengan biochar dosis 5 ton/ha. Keterkaitan yang erat antara bakteri dengan pertumbuhan tanaman memiliki hubungan yang sangat kuat, sedangkan antara jamur dengan pertumbuhan tanaman memiliki hubungan yang lemah dan sedang.
Examining The Impact of Various Management Strategies Implemented to Combat Post-Harvest Fungal Rots Infecting Yam, Sweet Potato, And Cocoyam: Mengkaji Dampak Berbagai Strategi Manajemen Yang Diterapkan Untuk Memerangi Penyakit Busuk Jamur Pasca Panen Yang Menginfeksi Yam, Ubi Jalar, Dan Talas Ndifon, Elias Mjaika
Journal of Tropical Agricultural Engineering and Biosystems - Jurnal Keteknikan Pertanian Tropis dan Biosistem Vol. 13 No. 2 (2025): August 2025
Publisher : Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jkptb.2025.013.02.01

Abstract

Roots and tubers are essential foodstuffs, socio-economic, and industrial raw materials. Yams, cocoyam, and sweet potatoes are often infected before harvest, during harvest, in transit, and in storage by pathogens. Some sub-trials were conducted to devise management strategies against the principal fungal pathogens of these crops using botanical and bio-control agents. These inquiries included controlling isolated pathogens in vitro and in vivo. Six replicated experiments were set up using the completely randomized design.  In vitro, botanicals (i.e. Guieria, Bauhinia, Eucalyptus, Ricinus, and Ixora spp.) controlled Lasidioplodia theobromae resulting in up to 35.0% inhibition with time.  Parkia (100% concentration) and Tamarindus 100% significantly controlled L. theobromae most. Secondly, Trichoderma spp. inhibited L. theobromae in vitro causing up to 40% inhibition. T. virens isolate BGMZ2, T. viride AIBK, T. harmatum ZXGV, and T. harzianum AIBN (in descending order of efficiency) performed significantly (p?0.05) better than the Control. Thirdly, Mancozeb, Carbendazim+Mancozeb, and Mancozeb+Copper(I)Oxide+Metalaxyl controlled L. theobromae causing up to 100% inhibition with time. Application of the best botanicals like Guieria (50% concentration), Bauhinia (50% and 100%), Guieria 100%, and Ixora 100% leaves; Eucalyptus (50% and 100%) and Ricinus 100% resins significantly (p?0.05) reduced rots in vivo. These botanicals effectively controlled L. theobromae, causing up to 100% inhibition in vivo with time. Application of Eucalyptus, Cissus, Thymus, and Tamarindus spp. to control Phytophthora colocaciae, as well as application of Cymbopogon, Guieria, and Bauhinia spp. against Colletotrichum alatae lowered percentage rot compared to the control. These control agents were potent and they are strongly recommended.

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