Jurnal Online Politeknik Negeri Lampung
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Urea Berlapis Bakteri untuk Mengurangi Dosis Pupuk Urea pada Budidaya Kentang
Full text linkUrea fertilizers and biofertilizers play an important role in potato (Solanum tuberosum L.) cultivation, but urea fertilizers are volatile and leach out easily that reduce their effectiveness. Urea coated with beneficial bacteria-enriched organic matter is expected to increase nitrogen used efficiency. The purpose of the experiment was to determine the ability of bacterial-coated urea (BCU) included Bacillus and Azotobacter to improve the growth, nutrient status and yields of potatoes grown in field; as well as to reduce urea dose. The experiment was setup in randomized block design with five treatments and six replications. The treatments were four combinations of the dose and formulation of BCU; and conventional urea fertilizer as control treatment. Application of both BCU formulation increased plant height as well as N and P uptake particularly when the recommended dose was used. In contrast, the doses and formulation of BCU did not affect chlorophyll content. Application of BCU-A or BCU-B at the rate of 200 kg/ha increased tuber weight by 59% and 81% respectively. Both high and low dose of BCU did not reduce the vegetative growth and yield compared to the plants fertilized with conventional urea. This experiment showed that BCU is considered to reduce the rate of Urea in potatoes cultivation.Pupuk urea dan pupuk hayati berperan penting dalam budidaya kentang (Solanum tuberosum L.), namun pupuk urea mudah menguap dan tercuci sehingga mengurangi efektivitasnya. Pelapisan urea dengan bahan organik yang diperkaya bakteri menguntungkan diharapkan dapat meningkatkan efisiensi penggunaan nitrogen. Tujuan percobaan adalah untuk mengetahui kemampuan urea berlapis bakteri (bacterial-coated urea, BCU) dalam menginduksi pertumbuhan tanaman kentang, status hara dan hasil kentang yang ditanam di lapangan; serta untuk mengurangi dosis urea. Urea berlapis bakteri dikembangkan dengan melapisi urea dengan inokulan Bacillus dan Azotobacter padat. Percobaan dirancang dalam rancangan acak kelompok dengan lima perlakuan dan enam ulangan. Perlakuan tersebut adalah empat kombinasi dosis dan formulasi BCU; dan pupuk urea konvensional sebagai perlakuan kontrol. Penerapan kedua formulasi meningkatkan tinggi tanaman serta serapan N dan P terutama bila menggunakan dosis yang dianjurkan. Sebaliknya, dosis dan formulasi BCU tidak mempengaruhi kandungan klorofil. Aplikasi BCU-A atau BCU-B dengan takaran 200 kg/ha meningkatkan bobot umbi masing-masing sebesar 59% dan 81%. Pemberian BCU dosis tinggi maupun rendah tidak menurunkan pertumbuhan vegetative dan hasil kentang dibandingkan dengan tanaman yang diberi pupuk urea konvensional. Percobaan ini menunjukkan bahwa BCU dianggap dapat menurunkan kadar Urea dalam budidaya kentan
Pengaruh Konsentrasi Sorbitol dan Variasi Tingkat Penyangraian Terhadak Karakteristik Fisikokimia dan Organoleptik Kopi Robusta Cililin
Full text linkCililin is one of the robusta coffee producing regions in Indonesia, but there are still many people who do not know robusta coffee from Cililin, so an effort is needed to improve its quality. Coffee that goes through heating stages such as drying or roasting will cause several other chemical ingredients to change. Coffee processing can affect the characteristics and taste of the coffee produced. Soaking with sorbitol solution can retain moisture (humectant) in food and in processing that undergoes high temperature treatment so that it will not cause browning reactions One of the stages carried out in coffee processing using high temperatures is the roasting process. Therefore, a study was conducted to determine the effect of the difference in sorbitol concentration with roasting level on the characteristics of the Cililin robusta coffee products produced. This study consisted of two factors, namely sorbitol concentration (a1=10%, a2=15%, a3=20%) and roasting rate (b1 = Light Roast, b2 = Medium Roast, b3 = Dark Roast).Data processing using Two Way Anova on SPSS application version 26.0. The results showed that concentration had an effect on water content, color test and organoleptic response in color, aroma, and texture attributes, but did not affect the characteristics of caffeine levels, and pH. Roasting rate affects coffee characteristics, namely moisture content, caffeine content, pH, color test, and organoleptic response in color, aroma, and texture attributes. The interaction between sorbitol concentration and roasting rate affects the characteristics of robusta cililin coffee, namely moisture content and color test. However, it has no effect on the characteristics of caffeine levels, and pH.
Cililin is one of the robusta coffee producing regions in Indonesia, but there are still many people who do not know robusta coffee from Cililin, so an effort is needed to improve its quality. Coffee that goes through heating stages such as drying or roasting will cause several other chemical ingredients to change. Coffee processing can affect the characteristics and taste of the coffee produced. Soaking with sorbitol solution can retain moisture (humectant) in food and in processing that undergoes high temperature treatment so that it will not cause browning reactions One of the stages carried out in coffee processing using high temperatures is the roasting process. Therefore, a study was conducted to determine the effect of the difference in sorbitol concentration with roasting level on the characteristics of the Cililin robusta coffee products produced. This study consisted of two factors, namely sorbitol concentration (a1=10%, a2=15%, a3=20%) and roasting rate (b1 = Light Roast, b2 = Medium Roast, b3 = Dark Roast).
Data processing using Two Way Anova on SPSS application version 26.0. The results showed that concentration had an effect on water content, color test and organoleptic response in color, aroma, and texture attributes, but did not affect the characteristics of caffeine levels, and pH. Roasting rate affects coffee characteristics, namely moisture content, caffeine content, pH, color test, and organoleptic response in color, aroma, and texture attributes. The interaction between sorbitol concentration and roasting rate affects the characteristics of robusta cililin coffee, namely moisture content and color test. However, it has no effect on the characteristics of caffeine levels, and pH.
Keywords: Cililin Robusta Coffee, Sorbitol, Roasting Leve
Dampak Kemiringan Lahan terhadap Kadar Hara dan Produksi Kelapa Sawit
Full text linkPalm oil is one of Indonesia's sources of foreign exchange, derived from government, private, and smallholder plantations. However, palm oil production from smallholder plantations is relatively poor due to low-quality seeds, non-standard technical culture, low soil fertility, and a lack of attention to the topography and slope of the ground during planting. Therefore, this research aims to characterize the growth and production of oil palm based on soil and plant nutrient content on various land slopes. The research was conducted on an oil palm plantation in Baru Village, Siak Hulu District, Kampar Regency, Riau Province, Indonesia. Oil palm plants have been in production for seven years. The methods used in this research are survey methods, observation, and laboratory analysis. The research design used a non-factorial randomized block design. The research factor is the land slope, with three treatment levels consisting of flat land (0–8%), land slope 8–18%, and land slope 18–28%. The parameters observed in this research include land topographic characteristics, physical and chemical properties of soil, plant nutrient content, and agronomic characteristics of oil palm plants. The observation results showed that trunk circumference, number of fruit bunches per tree, and weight of bunches per tree gave better results on a slope of 8–18%. This is due to soil conservation measures in the form of rather deep depressions around the plant plates. However, the P and K nutrient levels of oil palm plants in this research area are included in the deficiency category. As a result, this research can help make decisions about fertilizer management and land usage in oil palm plantation areas with sloping topography.Palm oil is one of Indonesia's sources of foreign exchange, derived from government, private, and smallholder plantations. However, palm oil production from smallholder plantations is relatively poor due to low-quality seeds, non-standard technical culture, low soil fertility, and a lack of attention to the topography and slope of the ground during planting. Therefore, this research aims to characterize the growth and production of oil palm based on soil and plant nutrient content on various land slopes. The research was conducted on an oil palm plantation in Baru Village, Siak Hulu District, Kampar Regency, Riau Province, Indonesia. Oil palm plants have been in production for seven years. The methods used in this research are survey methods, observation, and laboratory analysis. The research design used a non-factorial randomized block design. The research factor is the land slope, with three treatment levels consisting of flat land (0–8%), land slope 8–18%, and land slope 18–28%. The parameters observed in this research include land topographic characteristics, physical and chemical properties of soil, plant nutrient content, and agronomic characteristics of oil palm plants. The observation results showed that trunk circumference, number of fruit bunches per tree, and weight of bunches per tree gave better results on a slope of 8–18%. This is due to soil conservation measures in the form of rather deep depressions around the plant plates. However, the P and K nutrient levels of oil palm plants in this research area are included in the deficiency category. As a result, this research can help make decisions about fertilizer management and land usage in oil palm plantation areas with sloping topography
STANDARISASI PROSES PENGOLAHAN SARI BUAH MENGKUDU DAN APLIKASI TEKNOLOGI ACTIVATED CARBON ADSORBSION DI SMK NURUL HUDA KABUPATEN PRINGSEWU
Full text linkUnit produksi pangan olahan Jurusan Farmasi di SMK Nurul Huda Kabupaten Pringsewu merupakan salah satu unit yang dibentuk untuk menghasilkan income generating bagi institusi ini. Kegiatan yang dilakukan pada unit ini terpusat pada beberapa kegiatan pengolahan pangan yang salah satunya sudah berkembang cukup besar, yaitu minuman sari mengkudu sejak 4 tahun yang lalu. Hasil analisis SWOT menunjukkan bahwa akar permasalahan kegiatan usaha pengolahan minuman sari mengkudu adalah (1) belum ada standar proses (SOP) baku yang digunakan di dalam mengolah sari buah mengkudu yang didukung pemahaman pengetahuan dasar tentang fermentasi, (2) preferensi konsumen terhadap minuman sari mengkudu masih terkendala dengan intensitas aroma produk yang sangat kuat, (3) belum ada informasi tentang komponen nutrisi dan senyawa bioaktif di dalam label kemasan yang sesuai regulasi. Berdasarkan masalah-masalah yang dihadapi, diperlukan upaya pendampingan dan bimbingan teknis pembuatan standar proses pengolahan, pengaplikasian metode penyerapan karbon aktif, dan perbaikan label kemasan pada minuman sari mengkudu yang diproduksi oleh pengelola unit pengolahan pangan jurusan Farmasi SMK Nurul Huda. Hasil Bimtek menunjukkan peningkatan pengetahuan peserta (guru dan pengelola unit pengolahan minuman sari mengkudu) sebesar 31.5%
Kualitas Beras dan Kandungan Gizi Tiga Genotipe Padi yang Dibudidayakan secara Organik dan Non Organik
Full text linkRice is the main staple food for most Indonesians. Rice consumption in Indonesia is increasing along with population growth. Efforts to increase rice production continue to be carried out. Increasing production using external inputs in the form of chemical fertilizers and pesticides has resulted in a decrease in food quality and land degradation. Meeting food needs must be harmonized with environmental sustainability. Organic rice cultivation can improve the quality of agricultural products and be friendlier to the environment. This research aims to determine the quality of rice and the nutritional content of three rice genotypes cultivated organically and non-organically. The research was conducted at the Politeknik Negeri Lampung, in August 2022- April 2023. The research results showed that the quality of rice from three rice genotypes (red, white, black) in the organic cultivation system met the Premium Quality requirements, while in the non-organic cultivation system it met the Medium Quality requirements I SNI 6128:2020. The nutritional quality of the three rice genotypes was not significantly different in organic and non-organic cultivation systems
Keywords: organic rice, brown rice, black rice, white rice, SNI 6128-2020Beras merupakan makanan pokok utama bagi sebagian besar masyarakat Indonesia Konsumsi beras di Indonesia semakin meningkat seiring dengan peningkatan penduduk. Usaha meningkatkan produksi beras terus dilakukan. Peningkatan produksi dengan menggunakan input eksternal dalam bentuk pupuk dan pestisida kimia, telah mengakibatkan penurunan kualitas bahan pangan dan degradasi lahan. Pemenuhan kebutuhan pangan harus diselarasakan dengan kelestarian lingkungan. Budidaya padi secara organik dapat meningkatkan kualitas hasil pertanian dan lebih ramah terhadap lingkungan . Penelitian ini bertujuan untuk mengetahui kualitas beras dan kandungan gizi tiga genotipe padi yang dibudidayakan secara organik dan non organik. Penelitian dilakukan di Politeknik Negeri Lampung, pada bulan Agustus 2022- April 2023. Hasil penelitian menunjukkan bahwa kualitas beras tiga genotipe padi (merah, putih, hitam) pada sistem budidaya organik memenuhi persyaratan Mutu Premium, sedangkan pada sistem budidaya non organik memenuhi syarat Mutu Medium I SNI 6128:2020. Kualitas gizi tiga genotipe padi tidak berbeda nyata pada sistem budidaya organik dan nor organik
Kata Kunci: beras organik, beras merah, beras hitam, beras putih, SNI 6128-202
Penerapan Teknik Cross-Validation untuk Menangani Overfitting pada Studi Kasus Implementasi Decision Tree untuk Prediksi Kanker Paru
No full textLung cancer is a condition caused by cancer cells growing in the lungs. Lung cancer causes a weakened immune system, tumors, and other abnormalities that prevent the body from functioning properly. Lung cancer examination uses various technologies, namely CT Scan, X-ray, and others. However, the examination is relatively expensive and takes a long time. The use of machine learning makes it possible to support lung cancer diagnosis. With the large amount of medical data available today, machine learning can recognize patterns in the data so that it will help the process of diagnosing lung cancer more effectively. This study aims to correct overfitting in previous research which used the decision tree method to predict lung cancer with cross-validation techniques. In this research, we use a public dataset from Data World. This dataset consists of 25 data attributes and has 1000 data. The results of this research are rules obtained from decision trees which are then evaluated to produce 96.7% accuracy, 96.7% precision, 96.7% recall, and 96.7% f1-score. These results show that the decision tree method performs well in predicting lung cancer early and the cross-validation technique can overcome overfitting in decision trees with more general and stable results.Kanker paru-paru adalah suatu kondisi yang disebabkan oleh sel kanker yang tumbuh di paru-paru. Kanker paru-paru menyebabkan melemahnya sistem kekebalan tubuh, tumor, dan kelainan lain yang menghalangi tubuh berfungsi dengan baik. Pemeriksaan kanker paru dilakukan dengan menggunakan berbagai teknologi yaitu CT Scan, X-ray, dan lain-lain. Namun pemeriksaannya relatif mahal dan memakan waktu lama. Penggunaan pembelajaran mesin memungkinkan untuk mendukung diagnosis kanker paru-paru. Dengan banyaknya data medis yang tersedia saat ini, machine learning dapat mengenali pola pada data tersebut sehingga akan membantu proses diagnosis kanker paru-paru dengan lebih efektif. Penelitian ini bertujuan untuk mengoreksi overfitting pada penelitian sebelumnya yang menggunakan metode pohon keputusan untuk memprediksi kanker paru dengan teknik validasi silang. Hasil penelitian ini berupa aturan yang diperoleh dari pohon keputusan yang kemudian dievaluasi menghasilkan akurasi 96,7%, presisi 96,7%, recall 96,7%, dan f1-score 96,7%. Hasil tersebut menunjukkan bahwa metode pohon keputusan memiliki kinerja yang baik dalam memprediksi kanker paru secara dini
KARAKTERISTIK MINUMAN HERBAL BUAH MANGROVE DAN JAHE DALAM PEMBUATAN MINUMAN HERBAL
Full text linkMangrove merupakan tanaman yang subur dan mendominasi di sekitar kawasan pesisir pantai. Salah satu potensi dalam memanfaatkan potensi buah mangrove adalah pembuatan minuman herbal. Metode penelitian yang digunakan pada penelitian ini yaitu menggunakan rancangan acak lengkap (RAL). Pengujian yang dilakukan berupa uji kadar air, uji kadar abu, uji organoleptik, dan uji aktivitas antioksidan. Hasil dari uji kadar air sebesar 1,87 – 1,15%, uji kadar abu sebesar 0,16 – 0,12%, uji organoleptik dengan formulasi terbaik yaitu formulasi E dengan perbandingan 30 g bubuk buah mangrove dan 20 g gula semur jahe merah, dan uji aktivitas antioksidan sebesar 1881,23 µg / mL. 2. Karakteristik fisiko kimia bubuk buah mangrove dan jahe merah secara fisik berdasarkan warna menghasilkan warna coklat, tekstur yang halus, serta aroma dan rasa yang khas buah mangrove dan jahe. Dengan kadar antioksidan sebesar 1881,23 µg / m
Pola Kemitraan Koperasi NCT Dengan CV RST
Full text linkKoperasi NCT merupakan koperasi yang bergerak di bidang pembibitan sapi potong dan hasil turunan lainnya. Koperasi NCT melakukan kemitraan dengan CV RST, hal yang mendorong koperasi NCT melakukan kemitraan yaitu karena masalah yang dihadapi koperasi NCT dalam restocking sapi bakalan dan pemasaran sapi potong. Berdasarkan hal itu kemitraan menjadi solusi dan manfaat bagi koperasi NCT. Tujuan penulisan tugas akhir ini adalah untuk (1) menjelaskan prosedur kemitraan Koperasi NCT dengan CV RST (2) menganalisis pola kemitraan antara Koperasi NCT dengan CV RST. Penulis menggunakan metode deskriptif untuk menjelaskan prosedur kemitraan dan menganalisis pola kemitraan. Hasil analisis dan pembahasan (1) prosedur kemitraan antara Koperasi NCT dengan RST terdiri dari (a) mengajukan permohonan bermitra oleh Koperasi NCT, (b) mengisi formulir dan kelengkapan data, (c) verifikasi data, (d) pembuatan kontrak kerjasama dan penandatanganan kontrak. (2) Pola kemitraan antara Koperasi NCT dengan CV RST adalah pola kemitraan dagang umu
Kinerja Usahatani Padi Sawah Di Kabupaten Tulang Bawang
Full text linkPadi masih merupakan bahan pangan pokok bagi masyarakat Indonesia, oleh karena itu komoditas padi memiliki arti strategis baik dari sisi ekonomi, lingkungan hidup, sosial maupun politik. Salah satu cara untuk menjaga kondusifitas masyarakat adalah mewujudkan stabilitas ketahanan pangan, membangun kemandirian pangan, maupun keamanan pangan. Tujuan penelitian ini adalah menganalisis faktor-faktor apa saja yang mempengaruhi kinerja usahatani untuk meningkatkan produksi padi sawah di Kabupaten Tulang Bawang, Mengidentifikasi faktor-faktor produksi (lahan, benih, pupuk, pestisida, dan tenaga kerja) yang berpengaruh terhadap produksi padi sawah. Menganalisis faktor-faktor produksi yang meningkatkan pendapatan petani di kabupaten Tulang Bawang.. Metode penelitian yang digunakan adalah penelitian survey, wawancara, dan pengamatan langsung dilapangan. Variabel eksogen yang diteliti meliputi efisiensi penggunaan faktor-faktor produksi (Saprodi, alsintan) dan efisiensi waktu yang digunakan selama proses produksi serta hasil yang diperoleh. Sedangkan variabel endogen meliputi produksi dan pendapatan. Populasi dalam penelitian ini adalah kelompok tani tanaman pangan (padi) di Kecamatan Rawajitu Selatan, Kabupaten Tulang Bawang. Teknik pengambilan sampel dengan menggunakan random sampling. Jumlah responden sebanyak 87 orang. Faktor[1]faktor produksi yang mempengaruhi kinerja usahatani dalam meningkatkan produksi padi dan pendapatan dianalisis menggunakan analisis Excel Coubdouglas. Hasil penelitian menunjukkan kinerja usaha tani termasuk dalam kategori efisien dengan R/C ratio 1,64. Faktor-faktor produksi berpengaruh secara signifikan terhadap kinerja usahatani pad
Peningkatan Kualitas Briket Serabut dan Cangkang Kelapa Sawit Melalui Torefaksi
Full text linkIndonesia is a tropical region with enormous biomass potential as a source of new, renewable energy. The palm oil processing industry (PKS) produces solid biomass in the form of palm shells and fiber which is used as an energy source, but the quantity exceeds the energy needs of the industry. Solid fuel from biomass has limitations due to the low calorific value produced. This research aims to examine the improvement in quality of briquettes made from palm fiber and shells through torrefaction at temperatures of 2000C and 3000C. The research results show that torrefaction is able to improve the quality of biomass briquettes, both fiber and a mixture of fiber and palm oil shells. The quality of the mixed shell and fiber briquettes resulting from torrefaction at 3000C meets SNI 01-6235-2000 for the parameters of calorific value, water content and ash content of 6680 cal/g, 4.58% and 6.07% respectively.Indonesia merupakan daerah tropis dengan potensi biomassa sangat besar sebagai sumber energi baru terbarukan. Industri pengolahan kelapa sawit (PKS) menghasilkan biomassa padat berupa cangkang dan serat kelapa sawit yang dimanfaatkan sebagai sumber energi namun kuantitasnya melebihi kebutuhan energi di industri tersebut. Bahan bakar padat dari biomassa memiliki keterbatasan pada rendahnya nilai kalor yang dihasilkan. Penelitian ini bertujuan untuk mengkaji peningkatan kualitas briket berbahan baku serabut dan cangkang kelapa sawit melalui torefaksi pada suhu 2000C dan 3000C. Hasil penelitian menunjukkan torefaksi mampu meningkatkan kualitas briket baik serat maupun campuran serat dan cangkang kelapa sawit. Kualitas briket campuran cangkang dan serabut hasil torefaksi suhu 3000C memenuhi SNI 01-6235-2000 untuk parameter nilai kalor, kadar air dan kadar abu masing-masing sebesar 6680 kal/g, 4,58%, dan 6,07%