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All Journal Jurnal Akuakultur Indonesia Jurnal Keteknikan Pertanian Jurnal Scientia Leuit, Journal of Local Food Security
Yayu Romdhonah
Jurusan Agroekoteknologi, Fakultas Pertanian, Universitas Sultan Ageng Tirtayasa, Banten
Agriculture, Biological Sciences & Forestry Education Mathematics

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Effects of dietary Bacillus NP5 and sweet potato extract on growth and digestive enzyme activity of dumbo catfish Clarias sp. Achmad Noerkhaerin Putra; Yayu Romdhonah
Jurnal Akuakultur Indonesia Vol. 18 No. 1 (2019): Jurnal Akuakultur Indonesia
Publisher : Indonesian Society of Scientific Aquaculture (ISSA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3508.494 KB) | DOI: 10.19027/jai.18.1.80-88

Abstract

ABSTRACT This study aimed to investigate the effects of probiotic (Bacillus NP5), prebiotic (extracted from Ipomoea batatas var. sukuh,), and synbiotic on growth and digestive enzyme activity of dumbo catfish (Clarias sp.). Four treatments with 3 replications were used in the experiment, i.e; control, probiotic (1% Bacillus NP5 in feed), prebiotic (2% sweet potato extract in feed), and synbiotic (1% probiotic and 2% prebiotic in feed). After 45 days of rearing, catfish that were given probiotic, prebiotic, and synbiotic showed significantly (P<0.05) higher growth than that of the control. The average results on digestive enzyme activities in probiotic, prebiotic, and synbiotic treatments were significantly different (P<0.05) from that of the control. The addition of synbiotic to diets showed the best result on final weight, specific growth rate, feed conversion ratio, protein retention, protein efficiency ratio, and protease activities among other treatments. Keywords: catfish, growth, probiotic, prebiotic, symbiotic  ABSTRAK Penelitian ini bertujuan untuk menginvestigasi pengaruh dari probiotik (Bacillus NP5), prebiotik (ekstrak ubi jalar varietas sukuh), dan sinbiotik terhadap pertumbuhan dan aktivitas enzim perncernaan ikan lele dumbo (Clarias sp.). Penelitian terdiri dari 4 perlakuan dan 3 kali ulangan, yakni: probiotik (Bacillus NP5 sebanyak 1% dalam pakan), prebiotik (ekstrak ubi jalar sebanyak 2% dalam pakan), dan sinbiotik (Bacillus NP5 1% + ekstrak ubi jalar sebanyak 2% dalam pakan). Setelah pemeliharaan selama 45 hari, ikan lele pada perlakuan dengan suplementasi probiotik, prebiotik, dan sinbiotik dalam pakan secara signifikan (P<0,05) menghasilkan pertumbuhan yang lebih baik dibandingkan dengan kontrol. Nilai aktivitas enzim pencernaan pada perlakuan probiotik, prebiotik, dan sinbiotik secara signifikan berbeda (P<0,05) dari kontrol. Penambahan sinbiotik pada pakan memberikan hasil terbaik pada parameter bobot akhir, laju pertumbuhan harian, FCR, retensi protein, rasio efisiensi protein, dan aktivitas enzim protease dibandingkan dengan perlakuan lainnya. Kata kunci: ikan lele, pertumbuhan, probiotik, prebiotik, sinbiotik.  
ANALlSIS SUDUT DATANG RADIASI MATAHARI UNTUK PENGEMBANGAN MODEL PINDAH PANAS PADA RUMAH KACA DI DAERAH TROPIKA Herry Suhardiyanto; Yudi Chadirin; Titin Nuryawati; Yayu Romdhonah
Jurnal Keteknikan Pertanian Vol. 21 No. 1 (2007): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.021.1.%p

Abstract

ABSTRACT A heat transfer model has been developed for a naturally ventilated greenhouse under the tropical climatic conditions. In the tropical region, greenhouses are characterized by high exposure in solar radiation and air exchange through natural ventilation. Therefore in this research, incident angle of solar radiation on the greenhouse roof surface has been considered as an important factor to improve the accuracy in calculating the radiation received by the greenhouse. The heat transfer model consists of four layers represent the cover, inside air, floor surface and soil layers of the greenhouse. The model was applied to a naturally ventilated standard-peak greenhouse. A computer program was developed to predict the temperature of the inside air. Incident angle of direct solar radiation on roof surface and outside microclimate parameters data were used as the input values. Heat transfer equations were solved by using the Runge-Kutta Method while the angle of direct solar radiation with the roof surface was calculated by using the principles of geometry. Results show that the model performed well in predicting the temperature of the inside air as compared to that of the measure value.Diterima:  4 Januari 2007; Disetujui: 26 Pebruari 2007
RESEARCH ON GREENHOUSE APPLICATION IN THE TROPICS Herry Suhardiyanto; Yayu Romdhonah
Jurnal Keteknikan Pertanian Vol. 21 No. 4 (2007): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.021.4.%p

Abstract

ABSTRACTStudies on greenhouse technology for tropical conditions show significant progress in the last decade. Several concepts of adapted greenhouse structure heve been proposed by scientists in ordor to provide optimum environment for the growing plants inside, This paper reviews on some studies concentrated on Improving the performance of greenhouse structure for tropical conditions. It presents some information on the design. material selection and the construction of several proposed greenhouses. It is hoped to give helpful information for future research as well as be implemented in commercial greenhouses In the tropics Keywords: greenhouse. natural ventilation. structural design, tropics. Diterima: 17 September 2007; Disetujui: 28 Oktober 2007 
The Effect of Adding Rabbit Urine POC on the Production of Three Pak choi Plants by Hydroponic Wick System Ahmad Aliwinarjo; Nur Iman Muztahidin; Abdul Hasyim Sodiq; Yayu Romdhonah
Leuit (Journal of Local Food Security) Vol 3, No 2 (2022)
Publisher : Pusat Unggulan Iptek Ketahanan Pangan Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37818/leuit.v3i2.17323

Abstract

The hydroponic system is still constrained by the high cost of AB mix nutrients. This study aimed to determine the effect of adding rabbit urine as Liquid Organic Fertilizer (LOF) to the nutrient solution on the growth and yield of three varieties of pak choi (Brassica rapa L.) with a wick hydroponic system. The experiment used a split plot design for the main plot of LOF (K) which consisted of 3 levels, namely control (K0), mixture AB + 6 ml/l LOF (K1), and mixed AB + 12 ml/l LOF (K2), and sub plot of varieties (V) consisting of 3 levels, namely Nauli f1 (V1), Emone 26 (V2) and Green (V3). The results showed that increasing the concentration of LOF in rabbit urine in 12 ml/l nutrient solution did not have any significantly different result on the growth and yield of pak choi plants. However, Emone 26 varieties showed a very significant effect on growth and yield, with average values on the parameters of plant height, number of leaves, fresh weight, crown fresh weight and crown dry weight at 35 Days After Planting (DAP). 25.14 cm, 14.22 pieces, 94.69 g, 79.06 g, and 4.43 g, respectively. There was no interaction between the addition of LOF rabbit urine to the growth and yield of three varieties of pak choi on all parameters observed. Further research needs to be done on other hydroponic systems in order to obtain the right POC concentration to reduce the use of AB mix nutrients.
EFFECT OF TREATMENT OF VARIOUS PHYSICAL SCARIFICATIONS AND CONCENTRATION LEVELS OF POTASSIUM NITRATE SOLUTION (KNO3) ON THE GERMINATION OF MOUNTAIN SOURSOP SEEDS (Annona montana Macfad) Aliffia Pratiwi; Yayu Romdhonah; Dewi Ayu Lestari; Nur Iman Muztahidin; Imas Rohmawati
Jurnal Scientia Vol. 12 No. 01 (2023): Education, Sosial science and Planning technique
Publisher : Sean Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58471/scientia.v12i01.1068

Abstract

This study aimed to determine the effect of various physical scarification and the level of potassium nitrate (KNO3) concentration on the germination of mountain soursop (Annona montana Macfad) seeds. This research was carried out at the Research Greenhouse in Purwodadi Botanic Garden, Research Center of Plant Conservation, Botanic Garden and Forestry, National Research and Innovation Agency from January to March 2022. The study used a randomized block design (RBD) which was arranged in a factorial manner and consisted of two factors. The first factor was various physical scarification of the seeds (without scarification, scratching, shearing, and sanding). The second factor was the concentration level of the KNO3 solution (0,2%, 0,4%, and 0,6%). There were 12 combinations with 3 replications so there were 36 experimental units. The parameters measured were germination age (days), normal germination percentage (%), abnormal germination percentage (%), maximum growth potential (%), germination capacity (%), and growth rate (%/day). The results showed that sanding physical scarification gave the best affect on parameter germination age (days) and germination capacity (%) of mountain soursop seeds. The concentration level of the KNO3 solution 0,6% gave the best affect for all parameters observed of mountain soursop seeds. There was no interaction between physical scarification and concentration level of the KNO3 solution for all parameters observed of mountain soursop seeds.
Co-Authors Abdul Hasyim Sodiq Achmad Noerkhaerin Putra Ahmad Aliwinarjo Aliffia Pratiwi Dewi Ayu Lestari Erizal -, Erizal HERRY SUHARDIYANTO Imas Rohmawati Nur Iman Muztahidin Nur Iman Muztahidin Satyanto Krido Saptomo Titin Nuryawati Yudi Chadirin