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All Journal Journal of Tropical Soils Sains Tanah Agrotekma: Jurnal Agroteknologi dan Ilmu Pertanian JMM (Jurnal Masyarakat Mandiri) Jurnal Agrotek Tropika Abditani : Jurnal Pengabdian Masyarakat Jurnal Agrotropika Open Community Service Journal
Dedy Prasetyo
Jurusan Ilmu Tanah, Fakultas Pertanian, Universitas Lampung
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Environmental Science Social Sciences Other

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Succession of Fungal Community Structure in Degradative Land Caused by Basal Rot Pathogen of Garlic Cahyani, Vita Ratri; Rahayu, Devi Puji; Siswanto, Agus; Prasetyo, Dedy; Hadiwiyono, Hadiwiyono
Sains Tanah - Jurnal Ilmu Tanah dan Agroklimatologi 2014: Articles in Press (Vol. 11 No. 1)
Publisher : Faculty of Agriculture, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15608/stjssa.v0i0.216

Abstract

Land degradation causes a decreasement the ability of land in suppressing the development of pathogen FOCe that causes basal rot of garlic. In the garlic planting area in Tawangmangu discovered the fact that productive-suppressive land to FOCe the disease has low incidence (<1%) and degradative-conducive land with high incidens (≥60%). The research aims to study the succession of common fungal community structure and FOCe in the rhizosphere of garlic on both land for garlic plantation. The study was conducted from April to September 2013 in productive-suppressive land (Pancot) and degradative-conducive (Gondosuli) for soil sampling and laboratory analysis in Biologi Tanah UNS for fungi and FOCe analysis. The composite method used for sampling and the garlic rhizosphere samples  which is had healthy plants conditions aged 0, 20, 40, and 60 days after planting (DAP), and the garlic rhizosphere samples with healthy plants and diseased condition aged 80, 100, and 120 days after planting (DAP). Laboratory analysis using PDA culture medium as common fungi growing medium and SFA as a growing medium FOCe then observed population density and diversity. The method was pour plate method with 10-2 to 10-7 dilution. The results showed the population and diversity of fungi and FOCe have dynamics fluctuation. The fungi population in productive-suppressive land lower than degradative-conducive, with each value 108 and 3,5x108 CFU gram-1 soil. FOCe population on degradative-conducive land was higher than productive-suppressive land, and the highest population in both land at age 20 and 100 DAP with a FOCe density of each land about 1,25x107 and 1,66x107 CFU gram-1 soil. During the growth periode of garlic, the fungi diversity on productive-suppressive land always indicate higher than degradative-conducive land.
Isolasi Bakteri Rhizosfer Resisten Pestisida dan Herbisida pada Berbagai Jenis Tutupan Lahan Apriliya, Indah; Prasetyo, Dedy; Selvany, Remila
Agrotekma: Jurnal Agroteknologi dan Ilmu Pertanian Vol 5, No 1 (2020): Agrotekma: Jurnal Agroteknologi dan Ilmu Pertanian, Desember
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/agr.v5i1.4466

Abstract

The use of microbes as bioremediation agents is an alternative strategy to reduce residual or pesticide resistance. This study utilized rhizosphere microbes from various land covers as isolates. Soil samples used came from the rhizosphere of papaya, bamboo, peanuts, rice fields, maize, sweet potatoes, forest plants, cucumbers and guava. Isolation was carried out using Minimum Salt Agar (MSM) media which added 50 and 100 ppm of pesticide or herbicide. Microbes that were able to grow at a concentration of 100ppm were used as the selected isolates. Furthermore, the isolates were characterized by morphology and physiology such as; gram test, motility, pathogenicity, oxygen demand. As well as testing the microbial activity of selected isolates on the soil through a soil respiration test contaminated with herbicides and pesticides using sterile soil. A total of 5 selected isolates were used in the respiration test, namely with the code JMH, SH, HH, JP and TP. Of the 3 isolates that have the potential to degrade pesticides, the isolates with the JP code of 15.6 mg C-CO2 / g / day produced the highest respiration value. Meanwhile, of the 2 isolates had the potential to degrade herbicides, the isolates with the SH code of 9.6 mg C-CO2 / g / day produced the highest respiration value. These isolates have potential as biodegradation agents for pesticides and herbicides, so it is necessary to continue for further analysis regarding quantification and the mechanism of biodegradation.
Effect of the 32nd-year Soil Tillage and Nitrogen Fertilization on the Population and Biomass of Earthworm under Zea mays L. Prasetyo, Dedy; Imaria, Dwi; Niswati, Ainin; Yusnaini, Sri
JOURNAL OF TROPICAL SOILS Vol 26, No 2: May 2021
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2021.v26i2.105-113

Abstract

The abundance and biomass of earthworms are affected by soil tillage and fertilization. This research aimed to study long-term 32nd-year soil tillage and nitrogen fertilization on the population and biomass of earthworms under Zea mays L. The research was conducted using a randomized block design (RBD) which consisted of two factors. The first factor was the soil tillage that was Intensive Tillage (IT), Minimum Tillage (MT), and No-Tillage (NT). The Second factor was nitrogen fertilization that was N0 = 0 kg N ha-1 and N1= 200 kg N ha-1. Data of earthworm population and biomass were tested using analysis of variance and continued with the least significant difference (LSD) test at the 95% significant level. The population and biomass of earthworms at MT or NT were higher than IT. The population and biomass of earthworms in the plots without fertilization were higher than those at 200 kg N ha-1. There was an interaction between the soil tillage and N fertilization on earthworm biomass observed 60 days after planting at a 0-10 cm depth. There was a positive correlation between soil pH and earthworm population and biomass before the tillage phase.
Pembuatan dan Upaya Peningkatan Kualitas Pupuk Organik Cair Dedy Prasetyo; Rusdi Evizal
JURNAL AGROTROPIKA Vol 20, No 2 (2021): Oktober 2021
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/ja.v20i2.5054

Abstract

Conventional agricultural practices are very intensively utilizing synthetic agrochemicals. The resulting impact is a decrease in soil quality, thereby reducing fertilizer efficiency and plant yield. Efforts to maintain soil health include restoring organic matter. Organic fertilizers can be produced by utilizing the surrounding agricultural waste. Liquid organic fertilizer (LOF) can be produced from organic waste which should be chosen from high content of macro nutient. The quality of LOF could be increased by adding commercial decomposer starter or local microorganism. Organic matter of high energy should be added as well. The process of making liquid organic fertilizer is involved a fermentation process. Microbes will decompose organic material by breaking down the nutrients in the material to dissolve in solution. POC applications have been tested on various agricultural commodities. The provision of POC can increase the growth and yield of plants. In addition, the use of POC can improve soil health. Keywords : fermentation, fruit, industry, microbe, LOF, pulp, quality, vegetable, waste
PENGOMPOSAN LIMBAH PERTANIAN IN SITU MENGGUNAKAN STARTER MIKROORGANISME LOKAL DI DESA BAWANG SAKTI JAYA, PROVINSI LAMPUNG Septi Nurul Aini; Astriana Rahmi Setiawati; Liska Mutiara Septiana; Winih Sekaringtyas Ramadhani; Dedy Prasetyo
JMM (Jurnal Masyarakat Mandiri) Vol 6, No 3 (2022): Juni
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1337.665 KB) | DOI: 10.31764/jmm.v6i3.7696

Abstract

Abstrak: Kondisi lahan pertanian yang kurang produktif antara lain disebabkan oleh penggunaan pupuk kimia yang terus menerus. Kompos, yang dalam proses pembuatannya melibatkan mikroorganisme lokal (MOL) diyakini dapat menjadi solusi untuk mengatasi permasalahan tersebut. Tujuan dari kegiatan ini yaitu untuk memberikan pengetahuan dan ketrampilan kepada petani tentang pembuatan kompos dari limbah pertanian in situ dengan penambahan starter MOL. Kegiatan pelatihan ini ditujukan kepada petani di Desa Bawang Sakti Jaya. Kegiatan pelatihan meliputi ceramah, demonstrasi dan praktik pembuatan MOL dan kompos. Kegiatan berlangsung selama 6 bulan dan diakhir kegiatan diharapkan peserta pelatihan dapat membuat kompos tersebut. Salah satu indikator keberhasilan kegiatan pelatihan ini juga diukur dari peningkatan pengetahuan petani dilihat dari hasil pre-test dan post-test. Setelah melaksanakan kegiatan ini, pengetahuan petani terlihat sangat meningkat. Hal itu ditunjukkan dari peningkatan nilai post-test dibandingkan dengan pre-test dari 69% (pre-test) menjadi 95% (post-test). Hasil pre-test dan post-test ini menunjukkan bahwa setelah adanya pelatihan ini, pengetahuan petani meningkat sebesar 26%.Abstract: The continuous use of chemical fertilizers causes agricultural land to become less productive. Compost, which in the manufacturing process involves local microorganisms (MOL) is believed to be a solution to overcome these problems. The purpose of this activity was to provide knowledge and skills to farmers about making compost from agricultural waste in situ with the addition of MOL starter. This training activity was aimed at farmers in Bawang Sakti Jaya Village. The training activities include lectures, demonstrations and practice of making MOL and compost. The activity lasts for 6 months and at the end of the activity it is hoped that the training participants can make the compost. One indicator of the success of this training activity is also measured by the increase in farmer knowledge seen from the results of the pre-test and post-test. After carrying out this activity, the knowledge of farmers seems to have improved greatly. This is indicated by the increase in the post-test score compared to the pre-test from 69% (pre-test) to 95% (post-test). The results of the pre-test and post-test showed that after this training, farmers' knowledge increased by 26%.
APLIKASI BIOCHAR BATANG SINGKONG DAN PEMUPUKAN FOSFAT PADA TANAH ULTISOL TERHADAP P TERSEDIA, PERTUMBUHAN, DAN PRODUKSI JAGUNG (Zea mays L.) Dedy Prasetyo; Fadil fajarindo; Sarno Sarno; Supriatin Supriatin; Tamaluddin Syam
Jurnal Agrotek Tropika Vol 10, No 2 (2022): JURNAL AGROTEK TROPIKA VOL 10, MEI 2022
Publisher : Departement of Agrotechnology, Agriculture Faculty, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jat.v10i2.5949

Abstract

Penggunaan biomassa sisa hasil pertanian berupa batang singkong sebagai bahan baku pembuatan biochar dikarenakan jumlahnya cukup banyak, sehingga menyebabkan adanya penumpukan limbah hasil pertanian di sekitar lahan.  Limbah yang tidak digunakan ini dapat diolah menjadi biochar sebagai bahan pembenah tanah untuk meningkatkan P tersedia dalam tanah dan pertumbuhan serta produksi tanaman jagung.  Penelitian pengaruh pemberian biochar batang singkong dan pemupukan P terhadap P tersedia dan pertumbuhan serta produksi jagung (Zea mays L.) pada tanah Ultisol dilaksanakan di Laboratorium Lapang Terpadu Universitas Lampung dan analisis tanah dilakukan di Laboratorium Ilmu Tanah Fakultas Pertanian Universitas Lampung.  Metode yang digunakan dalam penelitian ini adalah Rancangan Acak Kelompok Lengkap (RAKL) dengan 2 faktor yaitu dosis biochar 0; 2,5; dan 5 ton ha-1 serta dosis pemupukan P 0; 36; dan 72 kg P2O5 ha-1. Hasil penelitian menunjukkan bahwa pemberian 5 ton biochar batang singkong ha-1 dengan pemupukan P 36 kg P2O5  ha-1 mampu meningkatkan P tersedia sebesar 13,42 ppm dan pH tanah sebesar 6,10 serta potensi produksi jagung sebesar 11,01 ton ha-1.
Pemanfaatan Larva Black Soldier Fly Dalam Mendukung Pengelolaan Sampah Terpadu Dan Meningkatkan Kegiatan Semi Urban Safe and Healthy Farm Winih Sekaringtyas Ramadhani; Ali Rahmat; Dedy Prasetyo; Nurwahidin; Ahmad Maulana Irfanudin; Ega Restapika Natalia; Jonah Febriana; Linandu Darmawan; Pandan Arum Irawan; Fazar Sidiq Kusumah Putra; Muhammad Frayoga Janata
Open Community Service Journal Vol. 1 No. 1 (2022): Open Community Service Journal
Publisher : Research and Social Study Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (643.876 KB) | DOI: 10.33292/ocsj.v1i1.1

Abstract

Pinang Jaya adalah sentra produksi sayur-mayur di Kota Bandar Lampung. Namun tidak semua sayur-mayur layak untuk dijual, akibatnya terjadi penumpukan limbah organik yang tidak dikelola dengan tepat. Solusi yang dimungkinkan yaitu pemanfaatan limbah organik menjadi kompos organik. Namun pengomposan dengan mikroba membutuhkan waktu lama. Salah satu organisme yang mampu merombak sampah dalam waktu yang cepat yaitu larva Black Soldier Fly (BSF). Sehingga perlu dilakukannya pendampingan, memberikan wawasan serta keterampilan dalam memanfaatkan larva BSF. Kegiatan pengabdian dilakukan dengan ceramah, demonstrasi, evaluasi dan demoplot. Mitra yang terlibat 15 orang perwakilan dari kelompok tani, tim PKK dan pengurus SHF. Indikator keberhasilan kegiatan pelatihan ini yaitu pemahaman petani terhadap keuntungan dari memanfaatkan larva BSF. Penilaian pemahaman dilakukan dengan pengambilamn sampel 10 warga untuk dilakukan pre-test dan post-test. Berdasarkan hasil pengamatan, terjadi peningkatan pemahaman dari 17% menjadi 95% terkait manfaat BSF. Sehingga terjadi peningkatan pemahaman terkait pemanfaatan limbah organik dengan larva BSF sebesar 78%. Masyarakat mampu memahami cara budidaya serta pemanfaatan larva BSF dalam mendukung Semi Urban Safe and Healthy Farm.
PELATIHAN PEMBUATAN PGPR UNTUK BAHAN PENGAYA BIOCHAR SEBAGAI MEDIA TUMBUH BIBIT KAKAO DI DESA SIDOMULYO, KABUPATEN TANGGAMUS Dedy Prasetyo; Rusdi Evizal; Liska Mutiara Septiana
Jurnal Abditani Vol. 6 No. 1 (2023): April
Publisher : FAKULTAS PERTANIAN UNIVERSITAS ALKHAIRAAT

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31970/abditani.v6i1.214

Abstract

Plant growth promoting bacteria (PGPR) merupakan sekumpulan mikroba bermanfaat bagi pertumbuhan tanaman dan sebagai bahan pengaya biochar untuk bahan media tanam. Di Desa Sidomulyo mayoritas bekerja sebagai petani perkebunan diantaranya kakao. Bibit kakao diusahakan sendiri oleh petani dengan metode stek. Kualitas bibit kakao dapat ditingkatkan dengan menggunakan media tanam yang tepat misalnya memanfaatkan PGPR dan biochar. PGPR berasal dari sumberdaya hayati lokal seperti akar bambu, sedangkan biochar berasal dari sekam padi. Kegiatan pelatihan dilakukan dengan metode ceramah, praktik pembuatan PGPR, dan demplot. Perlakuan yang digunakan sebagai demoplot antara lain: Kontrol, aplikasi PGPR, Biochar, dan kombinasi PGPR-biochar. Masing-masing perlakuan diulang 3 kali ulangan sehingga didapatkan 12 unit percobaan. Variabel yang diamati antara lain tinggi tanaman dan pH media tanam. Kegiatan dilaksanaan 22 Agustus 2022, dengan jumlah peserta sebanyak 15 petani. Hasil evaluasi pretest dan postest menunjukkan peningkatan pemahaman yang signifikan mengenai PGPR dari 13% menjadi 80%. Monitoring hasil pembuatan PGPR dinyatakan berhasil dengan indikator produk berbau seperti tape setelah 14 hari fermentasi. Hasil demplot menunjukkan bahwa perkembangan tinggi tanaman pada perlakuan biochar lebih baik dibandingkan dengan perlakuan lainnya. Nilai pH tanah pada perlakuan aplikasi biochar lebih baik dibandingkan perlakuan yang lainnya
Co-Authors . Hadiwiyono Ahmad Maulana Irfanudin Ainin Niswati, Ainin Ali Rahmat Astriana Rahmi Setiawati Devi Puji Rahayu Ega Restapika Natalia Fadil fajarindo Fazar Sidiq Kusumah Putra I Ketut Suada Imaria, Dwi Indah Apriliya Jonah Febriana Linandu Darmawan Muhammad Frayoga Janata Nurwahidin Pandan Arum Irawan Ramadhani, Winih Sekaringtyas Rusdi Evizal Sarno Sarno Selvany, Remila Septi Nurul Aini Septiana, Liska Mutiara Sri Yusnaini Supriatin Supriatin Tamaluddin Syam Vita Ratri Cahyani