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All Journal AGRIVITA, Journal of Agricultural Science Jurnal Agro Industri Perkebunan Jurnal Penelitian Kelapa Sawit Jurnal Agrotek Tropika AGROVITAL : Jurnal Ilmu Pertanian
Dewi Riniarti
Politeknik Negeri Lampung
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Veterinary

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Karakterisasi Morfofisiologi dan Hasil Minyak 10 Genotip Nilam (Pogostemon cablin Benth.) Retno Wulansari; Muhammad Tahir; Wiwik Indrawati; Dewi Riniarti
Jurnal Agro Industri Perkebunan Volume 6 No. 1, Mei 2018
Publisher : Politeknik Negeri Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.036 KB) | DOI: 10.25181/jaip.v6i1.657

Abstract

Characterization of morphophysiology and oil yield of 10 patchouli genotypes (Pogostemon cablin Benth.) aims to test the morphology and physiology character of nine genotypes Aceh patchouli and one comparative clone (Lhokseumawe), obtain high yield oil clones (weight plant and essential oil content), and obtain genetic and phenotypic variabilities that can be used as a new genotype selection indicators. The research was conducted at Experimental Field and Plant Laboratory of the State Polytechnic of Lampung in April until November 2016. This research used Randomized Block Design (RBD) with 10 treatment levels and 3 replications.The LSI test results on the physiological character of the nine genotypes and one comparative clone showed that NPL 9 genotypes superior to the variables of the angle of petiole, chlorophyll content, leaf area, specific leaf area, and leaf area index. The NPL 9 genotypes resulted higher yield and rendement yields than other genotypes tested and one comparator, that was 2,36%. The character of stem production and rendement has a genetic variant value greater than the environmental variant. For genetic variability and phenotypic variability in the variables observed relatively uniform so that can not be used as an indicator of selection.   Keywords: Aceh patchouli, leaf character, selection indicator, variability of genotype, variability of phenotype
Analisis Sistem Persediaan Bahan Baku Air Kelapa pada Industri Nata de Coco (Studi Kasus PT Keong Nusantara Abadi) Shella Puji Pangesti; Fadila Marga Saty; Dewi Riniarti
Jurnal Agro Industri Perkebunan Volume 7 No. 2, Oktober 2019
Publisher : Politeknik Negeri Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/jaip.v7i2.1111

Abstract

Inventory is an important thing for the industrial company, so determination of order quantity must be done optimally and reduce the inventory cost.  PT Keong Nusantara Abadi is an industrial company for processing of nata de coco that requires an inventory control system so that the purchase of raw material becomes optimal.  Therefore, this research was conducted to analyze inventory control carried out by PT Keong Nusantara Abadi and determine alternative methods of inventory control of raw material for the company.  This research use Material Requirement Planning (MRP) system.  MRP system has two ways to determine the order quantity called lot sizing decision.  Techniques for determining the quantity of order is Economic Order Quantity (EOQ), Lot for Lot (LFL), and Part Periode Balancing (PPB).  The technique of determining the order quantity that is best use by PT Keong Nusantara Abadi is EOQ which result in lower inventory cost than inventory control techniques by the company that is saved by 9%, 10%, 7,3% consecutively during 2015, 2016, and 2017.
Analisis Pengendalian Kualitas dalam Upaya Meminimalisasi Tingkat Kerusakan Produk Gula Rafinasi Faris Ghiyats; Fadila Marga Saty; Dewi Riniarti
Jurnal Agro Industri Perkebunan Volume 8 No. 2, Oktober 2020
Publisher : Politeknik Negeri Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/jaip.v8i2.1319

Abstract

Non-conformance occurs due to unavoidable production process, and there is need to reduce the potential occurrences as well as provide a solution to minimize the level of mismatch.  This study aims to identify the percentage and types of discrepancy experienced, by analyzing process capabilities and identify underlying factors in inconsistency. The research was performd in May 2018 at the department of process PT Sugar Labinta, Tanjung Sari, Lampung Selatan. Furthermore, analysis involved the six sigma method with a structured DMAIC approach, while the tools used include check sheet, caused diagram, p-control chart, and Pareto diagram. The results were then processed with the Minitab 18 software, which demonstrated the level sigma process in PT Sugar Labinta to be 5,04 with a DPMO of 238,32. The table of achievement indicates the company performance to be at an average level, in contrast with industries in the USA. However, the level of Sigma 6 is attainable under the circumstances where product-related inconsistences do not exceed 8 tonnes per month.
Genetic and Leaf Characteristic Diversity on 10 Mutant Progenies of Patchouli (Pogostemon cablin) Provide Insights to Selection Strategies Muhammad Tahir; Dewi Riniarti; Ersan Ersan; Jakty Kusuma
AGRIVITA, Journal of Agricultural Science Vol 41, No 1 (2019)
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v41i1.1908

Abstract

The importance of patchouli plants to produce essential oil has established this medicinal herb as one of the Indonesia’s main economic contributor. To date, Indonesia can only provide 5 varieties i.e. Sidikalang, Tapak Tuan, Lhokseumawe, Patchoulina 1 and Patchoulina 2. In order to increase national patchouli production, several efforts needs to be done by providing new superior patchouli lines. This experiment was undertaken to reveal diversity of mutant progenies derived from gamma ray irradiation in patchouli. Six SSR primers were used to determine genetic diversity on MV3 generation of the mutants. Molecular analysis revealed a moderate to high polymorphism based on tested primers, which amplified 73 bands, and resulting of 0.705 PIC value. Dendrogram analysis based on Euclidean dissimilarity showed broad diversity that ranged from 0.23 to 0.82. Phenotypic tree gave clear separation that all mutant clones were clustered into three different group, with Eucledian dissimilarity coefficient ranging from 0.02 to 0.13. This report indicates that Patchouli vegetatively-propagated mutants were able to maintain their variability continuously from their parental lines (M0). Furthermore, our findings offer comprehensive information on breeding strategies of patchouli plants, giving an opportunity to assess important traits at early generation.
Respons Pertumbuhan Bibit Kelapa Sawit Akibat Pengaturan Bobot Mulsa Tandan Kosong dan Frekuensi Penyiraman Yan Sukmawan; Dewi Riniarti
Jurnal Penelitian Kelapa Sawit Vol 28 No 3 (2020): Jurnal Peneltian Kelapa Sawit
Publisher : Pusat Penelitian Kelapa Sawit

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/iopri.jur.jpks.v28i3.121

Abstract

Lack of water is usually becomes a limiting factor for the growth of oil palm seedlings in main-nursery. This study was conducted to investigate the effect of the empty fruit bunch (EFB) mulch and watering frequency on the growth of oil palm seedlings maintained under main-nursery conditions. This study has been carried out in the nursery station of the Politeknik Negeri Lampung from April 2019 to September 2019, using completely randomized block design with two factor and three replications. The first factor is mulch weight (0 g, 100 g, 200 g, and 300 g) and the second factor is watering frequency (every day, every two days, and every three days). The results indicate that there are significant interactions between the EFB mulch and watering frequency on stem diameter, transpiration rate and photosynthesis rate of oil palm seedling. Application of 200 g and 300 g EFB mulch combined with watering frequency every two days and three days is able to produce the same stem diameter of oil palm seedling compared to the control. Low soil moisture around root of oil palm seedling causes photosynthesis and nutrients availability are reduced.
Pengaruh Pupuk NPK pada Pertumbuhan Tanaman Induk Lada (Piper nigrum L.) Tahun Kedua Yan Sukmawan; Bambang Utoyo; Dewi Riniarti; Riswansyah Riswansyah
AGROVITAL : Jurnal Ilmu Pertanian Vol 7, No 1 (2022): AGROVITAL VOLUME 7, NOMOR 1, MEI 2022
Publisher : Universitas Al Asyariah Mandar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35329/agrovital.v7i1.2159

Abstract

Pohon induk merupakan tanaman yang ditanam pada areal tertentu sebagai sumber bahan tanam. Pemberian pupuk dengan dosis yang cukup pada tanaman lada diperlukan untuk mendukung pertumbuhan tanaman. Penelitian ini bertujuan mendapatkan dosis pupuk NPK yang terbaik bagi pertumbuhan tanaman induk lada tahun kedua. Penelitian dilaksanakan di Kebun Percobaan Politeknik Negeri Lampung dan Laboratorium Analisis Kimia Politeknik Negeri Lampung. Penelitian dimulai pada Oktober 2019 sampai dengan Agustus 2020. Penelitian ini menggunakan Rancangan Acak Kelompok (RAK) faktor tunggal dengan empat perlakuan dan setiap percobaan diulang tiga kali sehingga terdapat 12 satuan percobaan. Setiap satuan percobaan terdiri atas tiga tanaman. Perlakuan dosis pupuk NPK terdiri atas tiga taraf, yaitu 287,5 g.tanaman-1.tahun-1 (P1), 575 g.tanaman-1.tahun-1 (P2), 862,5 g.tanaman-1.tahun-1 (P3), dan sebagai kontrol menggunakan pupuk tunggal dengan dosis pupuk yaitu urea sebesar 200 g.tanaman-1.tahun-1, SP-36 96 g.tanaman-1.tahun-1,dan  KCl 40 g.tanaman-1.tahun-1 (P0).Hasil penelitian menunjukkan bahwa pemberian pupuk NPK sampai dosis tertinggi belum mampu meningkatkan pertumbuhan tanaman induk lada pada tahun kedua, kecuali pada indeks kehijauan daun dosis 575 g.tanaman-1.tahun-1 dengan nilai rata-rata tertinggi 41,42.
TANGGAP TANAMAN INDUK LADA (Piper nigrum L.) TERHADAP APLIKASI KOMPOSISI DAN FREKUENSI PENYEMPROTAN PUPUK DAUN Yan Sukmawan; Dewi Riniarti; Dedi Supriyatdi; Wahyuni Lestari
Jurnal Agrotek Tropika Vol 10, No 4 (2022): JURNAL AGROTEK TROPIKA VOL 10, NOVEMBER 2022
Publisher : Departement of Agrotechnology, Agriculture Faculty, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jat.v10i4.5861

Abstract

Pepper (Piper nigrum L.) is one of the estate crops with high economic value and a foreign exchange earner for Indonesia, but its productivity is still low. For this reason, nutrient management is essential to increase the productivity of pepper parent plants. This study aimed to obtain the best composition of foliar fertilizer for pepper parent plant growth, obtain the best spraying frequency of foliar fertilizer for pepper parent plant growth, and obtain the best combination of composition and spraying frequency of foliar fertilizer for pepper parent plant growth. The study was conducted from November 2020 to April 2021 using a Randomized Block Design (RBD) with a factorial pattern of 4 × 2. The first factor was the composition of foliar fertilizers with four levels of treatment, namely control (D0), NPK foliar fertilizers 11:8:6 (D1), NPK foliar fertilizer 20:15:15 (D2), and NPK foliar fertilizer 32:10:10 (D3). The second factor is spraying frequency of foliar fertilizer with two levels of treatment, namely every two weeks (F1) and every four weeks (F2). Each treatment was repeated three times and each experimental unit consisted of two parent plants. Observational data was analyze using analysis of variance and continued with the honestly significant difference test (HSD) at the 5% level. The results showed that the composition of NPK foliar fertilizer 20:15:15 with the spraying frequency every two weeks gave a significant effect but did not give the best effect. Significant interactions were shown in the observation variables of number of leaf, number of internode, leaf greenness index, leaf area number three, and leaf dry weight number three.
Co-Authors Bambang Utoyo Dedi Supriyatdi Ersan Ersan Fadila Marga Saty Faris Ghiyats Jakty Kusuma Muhammad Tahir Retno Wulansari Riswansyah Riswansyah Shella Puji Pangesti Wahyuni Lestari Wiwik Indrawati Yan Sukmawan Yan Sukmawan