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All Journal Civil Engineering Forum Teknik Sipil Indonesian Journal of Science and Technology Jurnal Agrotek Tropika Journal of Tropical Crop Science Jurnal Plano Buana Indonesian Journal of Multidiciplinary Research (IJoMR)
Ali Rahmat
Staf Sabo Technical Centre, Yogyakarta
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Engineering Environmental Science Social Sciences Transportation Other

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PENGARUH IRIGASI DAN MULSA ORGANIK TERHADAP PERTUMBUHAN TANAMAN NANAS (Ananas comosus) DI DAERAH TROPIKA BASAH Rahmat, Ali; Afandi, Afandi; Manik, Tumiar K.B.; Cahyono, Priyo
Jurnal Agrotek Tropika Vol 2, No 1 (2014)
Publisher : Departement of Agrotechnology, Agriculture Faculty, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (60.409 KB) | DOI: 10.23960/jat.v2i1.1978

Abstract

Irigasi pada tanaman nanas sangat penting karena mempengaruhi pertumbuhan dan produksi terutama di daerah tropika basah, namun biaya untuk irigasi sangat mahal. Penelitian bertujuan untuk mengetahui pengaruh irigasi dan mulsa organik terhadap pertumbuhan tanaman nanas di daerah tropika basah. Penelitian dilakukan dengan rancangan perlakuan faktorial (5 x 2) dalam rancangan acak kelompok dengan 3 kali ulangan. Faktor pertama adalah lama irigasi (I) yang terdiri dari 5 lama irigasi yaitu tanpa irigasi (I0), diirigasi 1 bulan (I1), diirigasi 2 bulan (I2), diirigasi 3 bulan (I3), dan diirigasi 4 bulan (I4). Faktor yang kedua adalah dosis mulsa kulit singkong terdiri dari 2 taraf yaitu 0 t ha-1 (M0) dan 50 t ha-1 (M1). Data pertumbuhan tanaman dianalisis ragam dan dilanjutkan dengan uji BNT pada taraf 5%. Tinggi tanaman 6 BST perlakuan yang irigasi 4 bulan bermulsa dan tidak bermulsa tidak berbeda nyata, dengan tinggi tanaman tertinggi pada perlakuan I4M1 yaitu 80,39 cm. Berat basah tanaman 4 BST yang irigasi 4 bulan bermulsa, irigasi 4 bulan tanpa mulsa dan irigasi 3 bulan bermulsa tidak berbeda nyata. Terjadi pemulihan keragaan tanaman terutama berat basah setelah memasuki musim hujan dimana kadar air tanah maksimum.
Removal of Methylene Blue by Adsorption onto Activated Carbon From Coconut Shell (Cocous Nucifera L.) Khuluk, Rifki Husnul; Rahmat, Ali; Buhani, Buhani; Suharso, Suharso
Indonesian Journal of Science and Technology Vol 4, No 2 (2019): IJOST: VOLUME 4, ISSUE 2, 2019
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v4i2.18179

Abstract

This research has been conducted on process of production activated carbon from coconut shells, which are activated both physics and chemistry to improve the adsorption of methylene blue. The process of physical activation was done by burning the coconut shell using a furnace at a temperature of 700°C. The chemical activation was done using H3PO4 activator. The result of activated carbon physical activation (CAP) has a greater absorbency than activated carbon chemical activation (CAC) with each of the absorption of methylene blue at 99.42 and 98.64%. Analysis of surface morphology on the adsorbent was performed using a Scanning Electron Microscope (SEM). SEM results indicated that (CAP) has a surface morphology that is relatively similar to commercial activated carbon (CACm). Adsorption test was conducted on the determination of the optimum pH, adsorption rate, and isotherm adsorption of methylene blue. The results of the optimum pH on CAC, CAP, and CACm respectively obtained at pH 8 and the optimum contact time is obtained respectively at 40, 60, and 80 minutes. Adsorption kinetics data of methylene blue on CACm, CAP, and CAC tend to follow the pseudo second order kinetics with a correlation coefficient (R2) is 0.937; 0.950; and 0.999, respectively. Adsorption isotherm of methylene blue on CACm, CAP, and CAC tend to follow the model of Freundlich isotherms.
PENGELOLAAN SEDIMEN KALI GENDOL PASCA ERUPSI MERAPI JUNI 2006 Rahmat, Ali; Legono, Djoko; Kusumosubroto, Haryono
Civil Engineering Forum Teknik Sipil Vol 18, No 2 (2008): MEI 2008
Publisher : Civil Engineering Forum Teknik Sipil

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (442.364 KB)

Abstract

The Gendol River, with its catchment area of 66 km2 and the river length of about 22 km, originates from the south east of Mount Merapi. Nineteen sabo dams have been built in order to anticipate and control sediment disaster. The most upstream dam is Kaliadem (+1.100 msl) and the most downstream dam is consolidation dam of GE-C0 (+163 msl). Sand mining occurs at several points along the river and cause environmental damage. In order to conserve environment and to maintain sediment balance a proper sediment management is required. The research is conducted based on sediment balance. The analysis of transportable sediment volume (VS) is conducted using empirical formula of Takahashi (1991) and Mizuyama (1977). Over flow sediment volume (VE) was analyzed using empirical equation of Shimoda (1995). Sediment balance was analyzed based on maximum daily rainfall (R24) with 25 years return period. The result of the study shows that the sabo system in Gendol River effectively works to control lahar flow. As a conclusion, the existing sabo dams are able to maintain sediment balance in Gendol River. The possible amount of sand mining is estimated about 1.253.422 m3 and the allowable daily sand mining volume is estimated about 836 m3 per day.
Utilization of Stem Bark and Leaves of Kluwih (Artocarpus Altilis Park) as an Anti-Mosquito Repellent: A Case Study of Total Mosquito Mortality (Anopheles Sp) Kurniawan, Betta; Puspita, Laila; Kurnia, Yogi; Husna, Ismalia; Rahmat, Ali; Umam, Rofiqul; Andriana, Bibin B.; Jermsittiparsert, Kittisak
Indonesian Journal of Science and Technology Vol 5, No 3 (2020): IJOST: VOLUME 5, ISSUE 3, 2020
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v5i3.25370

Abstract

The purpose of this study was to demonstrate an alternative solution as an insecticide from Indonesian natural ingredients. We investigated the potential use of Artocarpus altilis park (known as kluwih plants in Indonesia) for an anti-mosquito repellent because it contains flavonoids and saponins. The use of this type of insecticide is harmless, inexpensive, and largely available in Indonesia. In the experiment, we extracted bark and leaves of kluwih to obtain insecticidal material to repel Anopheles sp. To ensure the precise extraction and insecticidial effect, the experiments were conducted four times with three repetitions. For each experiment, we used 8.4 mL with the concentrations of 20, 30, and 40% of flavonoid. The results showed that the higher the concentrations of bark and leaf extracts of Artocarpus altilis park the higher the mortality rate of Anopheles sp is.
The Combination of Biofertilizer and Organic Fertilizer to Improve Shallot (Allium ascalonicum L.) Production Widyastuti, R.A. Diana; Hendarto, Kus; Rahmat, Ali; Warganegara, Hayane Adeline; Listiana, Indah; Asmara, Sandi
Journal of Tropical Crop Science Vol 8 No 01 (2021): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jtcs.8.01.16-21

Abstract

Shallot is one of important horticultural crops in Indonesia; shallot consumption per capita is estimated to be 4.6 kg per year. The objective of this study was to evaluate the effect of combining biofertilizer and organic fertilizer on the production of shallot in Sukabanjar village, Pesawaran, Lampung, Indonesia. The study was set up using a randomized completely block design with two factors, biofertilizers and various organic fertilizers, i.e. cow manure, chicken manure, rice straw compost, oyster mushroom baglog. Our study demonstrated that combining biofertilizer and organic fertilizer significantly increased the number, diameter, and fresh and dry weight of tubers of “Bima Brebes” shallot. Shallots treated with biofertilizer combined with oyster mushroom baglog produced the highest tuber yield of 1788 g compared to 282 g in the control.
Analisis Tingkat Kehijauan Lahan Daerah Sukarame, Bandar Lampung Dengan Metode Ndvi Berdasarkan Citra Landsat Tahun 2000 dan 2020 Jannah, Anisa Miftakhul; Rahmat, Ali; Ramadhani, Winih Sekaringtyas; Istiawati, Novia Fitri
Jurnal Plano Buana Vol 2 No 1 (2021): Jurnal Plano Buana (Edisi Oktober 2021)
Publisher : Program Studi Perencanaan Wilayah dan Kota, Universitas PGRI Adi Buana Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (555.684 KB) | DOI: 10.36456/jpb.v2i1.3494

Abstract

Sukarame merupakan salah satu kecamatan yang ada di Kota Bandar Lampung dengan kepadatan penduduk yang tergolong tinggi. Secara administrasi pada tahun 2020, di wilayah Kecamatan Sukarame terdapat 6 kelurahan, 118 RT dan 12 lingkungan berdasarkan data dari kantor Kecamatan Sukarame. Jumlah penduduk di Kecamatan Sukarame yaitu, 66.124 jiwa. Kebutuhan akan tempat tinggal akan meningkat setiap tahunnya, namun tidak dibarengi dengan lahan pemukiman yang tersedia. Terbatasnya lahan pemukiman mendorong terjadinya perubahan penggunaan lahan dan penurunan kualitas lingkungan. Saat ini teknologi penginderaan jauh sudah semakin canggih, sehingga dapat mendeteksi sebaran vegetasi pada suatu wilayah, pola sebaran vegetasi, kerapatan vegetasi serta luas vegetasi. Indeks vegetasi digunakan untuk menggambarkan intensitas tanaman pada suatu wilayah pada citra. Indeks vegetasi yang banyak digunakan adalah NDVI (Normalized Difference Vegetation Index). Jumlah Ground Control Point (GCP) yang digunakan sebanyak 30 titik dengan rincian masing-masing 10 titik wilayah lahan terbuka dengan titik berwarna merah, vegetasi rendah dengan titik berwarna kuning dan vegetasi sedang dengan titik berwarna hijau. Pada tahun 2000 lahan yang memiliki vegetasi masih cukup banyak, namun pada tahun 2020 akibat meningkatnya lahan terbuka menyebabkan berkurangnya jumlah vegetasi. Untuk hasil yang didapat dari groundcek, terdapat beberapa lokasi yang kurang akurat sehingga tingkat keakuratan lokasi pada peta tutupan lahan tahun 2020 sebesar 93,3%.
Analysis of Cassava Peel and Pineapple Peel as Electrolytes in Bio Battery Sitanggang, Julia Elisabeth; Latifah, Nur Zahra; Sopian, Opi; Saputra, Ziyan; Nandiyanto, Asep Bayu Dani; Anggraeni, Sri; Rahmat, Ali
Indonesian Journal of Multidiciplinary Research Vol 1, No 1 (2021): IJOMR: VOLUME 1, ISSUE 1, 2021
Publisher : Universitas Pendidikan Indonesia (UPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1436.194 KB) | DOI: 10.17509/ijomr.v1i1.33774

Abstract

This study investigated the effect of the ratio of the electrolyte paste mixture of cassava peel (CP) and pineapple peel (PP) on the voltage and current strength. In the experiments, prior to using, CP and PP biomass waste was cleaned then soaked for 30 minutes. Furthermore, the biomass waste is mashed and put into the test media according to the comparison. In this study, CP/PP compositions were varied with the value of 100: 0; 75:25; 50:50; 25:75; and 0: 100. The results showed that the highest electrolyte obtained by voltage and current strength with a ratio of 100: 0. The more CP comparisons used, the greater the voltage and strong current. This research is potentially used as one of the renewable alternative energies and can utilize existing biomass waste.
Co-Authors Andriana, Bibin B. Asep Bayu Dani Nandiyanto Betta Kurniawan, Betta Buhani Buhani Djoko Legono Haryono Kusumosubroto Hayane Adeline Warganegara, Hayane Adeline Husna, Ismalia Indah Listiana Istiawati, Novia Fitri Jannah, Anisa Miftakhul Jermsittiparsert, Kittisak Khuluk, Rifki Husnul Kurnia, Yogi Kus Hendarto, Kus Laila Puspita, Laila Latifah, Nur Zahra Manik, Tumiar K.B. Priyo Cahyono, Priyo Raden Ajeng Diana Widyastuti Ramadhani, Winih Sekaringtyas Sandi Asmara Saputra, Ziyan Sitanggang, Julia Elisabeth Sopian, Opi Sri Anggraeni Suharso Suharso Umam, Rofiqul ZK Abdurahman Baizal