Articles

Found 28 Documents
Search

Application of Deep Sea Water for Multi-Trusses Cultivation of Tomato Using A Nutrient Film Technique CHADIRIN, YUDI; MATSUOKA, TAKAHISA; SUHARDIYANTO, HERRY
HAYATI Journal of Biosciences Vol 15, No 2 (2008): June 2008
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Original Source | Check in Google Scholar | Full PDF (407.092 KB)

Abstract

Deep sea water (DSW) that was applied to 3 trusses of cultivated tomato for 2 weeks affected fruits properties. However, advantageous effects on the soluble solids content, acidity, and dry matter content of the fruit tend to decline from 1st truss to the successive trusses. Thus it is necessary to study the effect of DSW application when it is applied for longer than 2 weeks in cultivated multi-trusses. In this study, DSW treatment was applied for different durations to obtain effect on fruits development and fruit properties of the 1st to 3rd truss in a 3 truss tomato cultivation system using a nutrient film technique. The results of the study show that DSW treatment has strong effect on fruit enlargement during the stage of rapid fruit growth, which lasts until the fruit almost reaches the final size. Treated plants produced tomatoes with better organoleptic with higher soluble solids content and higher acidity, higher dry matter content, a thicker and more resistant cuticle and also gave higher yields (weight and no of fruits) than in single truss tomato cultivation. Key words: tomato (Lycopersicon esculentum), deep sea water, fruit development, fruit properties, multi-trusses cultivation, nutrient film technique
PLC-based Control System for Nutrient Solution Supply Control in Drip Irrigation Suhardiyanto, Herry; Sapei, Asep; Arif, Chusnul; Patappa, Adi Marjani; Astuti, Biana Dwi
Jurnal Ilmiah Ilmu Komputer Vol 4, No 2 (2006): Jurnal Ilmiah Ilmu Komputer
Publisher : Jurnal Ilmiah Ilmu Komputer

Show Abstract | Original Source | Check in Google Scholar

Abstract

In most hydroponics farms, nutrient solution is distributed into individual crop through drip irrigation. The growers operate the pump manually according to weather condition. Under such manual control, losses of nutrient solution are often reported. An automatic control system based on Programmable Logic Controller (PLC) has been developed to reduce the losses while accurately supply the nutrient solution needed by the crop. The control system was composed of water content sensor for growing medium, PLC, and electronic relay for nutrient solution pump. A computer program was written in ladder form based on an algorithm developed to control the pump. The computer program was installed into the PLC which was the main unit in the control system. Field test had been conducted to evaluate the performance of the system in controlling the supply of nutrient solution for cucumber and tomato crops. Results showed that the control system perform well in controlling the pump for nutrient solution supply. Keywords : hydroponics, drip irrigation, nutrient solution supply, programmable logic controller
Fertigation Scheduling in Hydroponics System for Cucumber (Cucumis sativus L.) Using Artificial Neural Network and Genetic Algorithms Suhardiyanto, Herry; Arif, Chusnul; Suroso, ,
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 36, No 1 (2008): Jurnal Agronomi Indonesia
Publisher : Bogor Agricultural University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (63.676 KB)

Abstract

A computer program for fertigation scheduling in a hydroponics system has been developed using Artificial Neural Network (ANN) and Genetic Algorithms (GA). The ANN model was used to establish the relationship between the environmental factors and outflow volume of fertigation in a hydroponics system for cucumber. The result showed that the predicted outflow volume agreed well with those of the measured values. The correlation coefficients (R2) between the predicted and measured values were 0.9673, 0.9432, and 0.8248 for vegetative, flowering and maturation stages, respectively. Optimum schedules for vegetative, flowering, and maturation stages were in a good coincidence at R2 of 0.8808 with the amount of fertigation required by the plants as calculated using the empirical method.   Key words :  System identification, optimization, plant water consumption, fertigation, hydroponics
Application of Deep Sea Water (DSW) for Nutrient Supplement in Hydroponics Cultivation of Tomato : Effect of supplemented DSW at Different EC Levels on Fruit Properties Chadirin, Yudi; Matsuoka, Takahisa; Suhardiyanto, Herry; Susila, Anas D.
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 35, No 2 (2007): Jurnal Agronomi Indonesia
Publisher : Bogor Agricultural University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (1062.763 KB)

Abstract

Deep sea water (DSW) has the potential characteristics for nutrient supplement in hydroponics cultivation. This experiment was carried out to evaluate the application of DSW as a nutrient supplement for tomato cultivation in hydroponics system. Tomatoes were grown on 4 beds in nutrient film technique (NFT) system circulated with 1.5 dS m-1(control), 10 dS m-1 15 dS m-1 and 20 dS m-1 of nutrient solution, respectively.  DSW was supplemented into nutrient solution of control to obtain high EC level. Fresh weight of fruits decreased varied from 10-20% by increasing DSW concentration in nutrient solution, but the effect of the treatment was not found on size of 3rd truss fruits.  The density of fruits increased as the DSW concentration increased in nutrient solution. Tomato stiffness of treated plants had almost the same value among EC levels although different among 3 trusses.  Fruit quality parameters increased by increasing the DSW concentration in nutrient solution. Treated plants circulated with EC 20 dS m-1 supplemented nutrient solution for 2 weeks produced tomatoes with highest soluble solids, 8.0% Brix or increased 30% of control (1st truss).  However there were no significant effect on fruits of 2nd and 3rd trusses.  DSW could be used as nutrient supplement for hydroponics cultivation of tomato.     Key words :   Deep sea water, fruit quality, electrical conductivity, tomato
Aplikasi Jaringan Syaraf Tiruan (JST) Untuk Pendugaan Suhu Larutan Nutrisi yang Disirkulasikan dan Didinginkan Siang-Malam pada Tanaman Tomat Hidroponik Arief, Chusnul; Purwanto, Yohanes Aris; Suhardiyanto, Herry; Chadirin, Yudi
Jurnal Keteknikan Pertanian Vol 24, No 2 (2010): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Original Source | Check in Google Scholar | Full PDF (356.255 KB)

Abstract

Abstract Cultivation of tomato plant under hydroponics system in the greenhouse is suitable way to improve fruit quality since it is easier to control environmental parameters. In this system, water and nutrition are two important things for plant to growth. In the tropical area such as Indonesia, air temperature is main constraint in the plant production system. Increasing air temperature inside the greenhouse has positive correlation to the raising temperature of nutrient solution which affected to the ability of the plant to absord the nutrition. The effective way to anticipate increasing of its temperature is by using the cooling system of nutrient solution before circulated to the plant. This paper presented the application of Articificial Neural Network (ANN) to estimate the temperature of nutrient solution which was cooled on day-night time and circulated to the plant. ANN models, called time delay neural network, consist of 3 layers with 4 input nodes and 1 output node. As input model were t (time), Tg(i) (air temperature inside the greenhouse on time i), Tt(i) (temperature of nutrient solution in the tank on time i), Tb(i-1) (temperature of nutrient solution in the plant plots on time i-1) and as output model was Tb(i) (temperature of nutrient solution in the plant plots on time i). The model was developed well with validation result better than heat transfer model previously indicated by coefficient determination (R2) of 0.9498. Keywords: cooling, nutrient solution, hydroponic, tomato, artificial neural network Diterima: 15 Juni 2010; Disetujui: 30 juli 2010 
Pendinginan Zona Perakaran (Root Zone Cooling) pada Produksi Benih Kentang menggunakan Sistem Aeroponik Sumarni, Eni; Suhardiyanto, Herry; Seminar, Kudang Boro; Saptomo, Satyanto Krido
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 41, No 2 (2013): JURNAL AGRONOMI INDONESIA
Publisher : Bogor Agricultural University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (372.779 KB)

Abstract

High temperature is the major constraint to potato cultivation in the lowland for it causes stress and inhibit initiation of potato tuber. This study was designed to investigate the effects of root zone cooling upon seed potato production using aeroponics system in lowland wet tropical climates. Cultivation techniques used in this study was the aeroponics system with three cooling temperatures (10, 15, and 20 oC) and control (greenhouse room temperature). Plantlet of potato ‘Granola’ variety derived from tissue culture propagation were used. The results showed that the highest number of tuber and tuber weight that can be harvested up to 90 days after planting were obtained from cooling the root zone temperature at 10 °C with the average number of tuber 14.85 tubers plant-1and average weight of tubers 409.15 mg tuber-1. Plants grown at root zone cooling at 15 and 20 °C treatments produced lower number of tubers and lower tuber weight than at 10 oC, while plants grown at greenhouse temperature did not produce tubers.Keywords: cultivation techniques, Granola, high temperature, lowland tropical, potato tuber
ANALISIS VENTILASI ALAMIAH UNTUK MODIFIKASI RUMAH KACA STANDARD PEAK TIPE CURAM Suhardiyanto, Herry; Widyarti, Meiske; Chrisfian, Fiendy; Muliawati, Iin Sundani
Jurnal Keteknikan Pertanian Vol 20, No 2 (2006): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Original Source | Check in Google Scholar | Full PDF (1386.672 KB)

Abstract

ABSTRACT In tropical region, greenhouses are built to protect plant from heavy rain and insects. However, climatic conditions in the tropics are often ignored by greenhouse designers. In such hot and humid environment, antural ventilation is the most important factors to be considered. There is no cost required to operate the natural ventilation, but it needs an accurate openings design. This paper deals with a modification analysis of the steep-type standard peak greenhouse where inside air temperature was very high. A computer program has been developed to calculate neutral pressure plane and natural ventilation rate. It was used in simulation to predict natural ventilation rate in five alternatives of modified and two alternatives of newly designed greendhouse. An alternative of modified greenhouse design was selected according to the highest natural ventilation rate at the lowest cost. Keyword:
Analisis Pindah Panas pada Pipa Utama Sistem Hidroponik dengan Pendinginan Larutan Nutrisi Choerunnisa, Nurul; Suhardiyanto, Herry
Jurnal Keteknikan Pertanian Vol 3, No 1 (2015): JURNAL KETEKNIKAN PERTANIAN
Publisher : PERTETA

Show Abstract | Original Source | Check in Google Scholar | Full PDF (726.484 KB)

Abstract

AbstractIn a hydroponic culture with root zone cooling system, the temperature of cooled nutrient solution rises during distribution to the root zone of the plants. The aims of the research were to analyze the heat transfer from environment to nutrient solution in the main pipe of irrigation for hydroponic system, to validate the heat transfer model, and to develop a guidance to determine the inlet temperature for nutrient solution cooling. Mathematical model for heat transfer in the pipe was developed from heat transfer and fluid flow equations. Temperature of nutrient solution at the inlet position in the main distribution pipe was calculated by using validated heat transfer model. Validation of heat transfer model was done to compare the calculated temperature of nutrient solution with that of measured temperature. The results of heat transfer model validation showed that the heat transfer model is accurate to predict the temperature of nutrient solution in the main pipe. Therefore, the heat transfer model has been used to develop a guidance to determine inlet temperature of nutrient solution for certain condition of thermal environment and expectedoutlet temperature of nutrient solution.Keywords: heat transfer analysis, nutrient solution cooling, main pipe, substrate hydroponic systemAbstrakDalam kultur hidroponik dengan sistem pendinginan terbatas, suhu larutan nutrisi mengalami kenaikan selama didistribusikan menuju zona perakaran tanaman. Tujuan dari penelitian ini adalah untuk melakukananalisis pindah panas pada pipa utama sistem hidroponik, melakukan validasi terhadap model pindah panas tersebut, dan mengembangkan panduan untuk menentukan suhu dalam pendinginan larutan nutrisi pada posisi inlet. Model matematika untuk pindah panas dalam pipa tersebut dikembangkan dari persamaan-persamaan pindah panas dan aliran fluida. Suhu dari larutan nutrisi pada posisi inlet dari pipa distribusi utama dihitung dengan menggunakan model pindah panas yang telah divalidasi. Validasi model pindah panas dilakukan untuk membandingkan suhu larutan nutrisi hasil perhitungan dengan hasil pengukuran. Hasil validasi dari model pindah panas menunjukkan bahwa model pindah panas akurat untuk memprediksi suhu larutan nutrisi di dalam pipa utama. Oleh karena itu, model pindah panas tersebut digunakan untuk mengembangkan panduan dalam menentukan suhu larutan nutrisi pada posisi inlet untukkondisi lingkungan tertentu dan suhu larutan nutrisi posisi outlet.Kata kunci: analisis pindah panas, pendinginan larutan nutrisi, pipa utama, sistem hidroponik substratDiterima: 09 Oktober 2014; Disetujui: 07 Januari 2015
ANALISIS VENTILASI ALAMIAH UNTUK MODIFIKASI RUMAH KACA STANDARD PEAK TIPE CURAM Suhardiyanto, Herry; Widyarti, Meiske; Chrisfian, Fiendy; Muliawati, Iin Sundani
Jurnal Keteknikan Pertanian Vol 20, No 2 (2006): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Original Source | Check in Google Scholar | Full PDF (1386.672 KB)

Abstract

ABSTRACT In tropical region, greenhouses are built to protect plant from heavy rain and insects. However, climatic conditions in the tropics are often ignored by greenhouse designers. In such hot and humid environment, antural ventilation is the most important factors to be considered. There is no cost required to operate the natural ventilation, but it needs an accurate openings design. This paper deals with a modification analysis of the steep-type standard peak greenhouse where inside air temperature was very high. A computer program has been developed to calculate neutral pressure plane and natural ventilation rate. It was used in simulation to predict natural ventilation rate in five alternatives of modified and two alternatives of newly designed greendhouse. An alternative of modified greenhouse design was selected according to the highest natural ventilation rate at the lowest cost. Keyword:
Aplikasi Jaringan Syaraf Tiruan (JST) untuk Pendugaan Suhu Larutan Nutrisi yang Disirkulasikan dan Didinginkan Siang-Malam pada Tanaman Tomat Hidroponik Arief, Chusnul; Purwanto, Yohanes Aris; Suhardiyanto, Herry; Chadirin, Yudi
Jurnal Keteknikan Pertanian Vol 24, No 2 (2010): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Original Source | Check in Google Scholar | Full PDF (356.255 KB)

Abstract

AbstractCultivation of tomato plant under hydroponics system in the greenhouse is suitable way to improve fruit quality since it is easier to control environmental parameters. In this system, water and nutrition are two important things for plant to growth. In the tropical area such as Indonesia, air temperature is main constraint in the plant production system. Increasing air temperature inside the greenhouse has positive correlation to the raising temperature of nutrient solution which affected to the ability of the plant to absord the nutrition. The effective way to anticipate increasing of its temperature is by using the cooling system of nutrient solution before circulated to the plant. This paper presented the application of Articificial Neural Network (ANN) to estimate the temperature of nutrient solution which was cooled on day-night time and circulated to the plant. ANN models, called time delay neural network, consist of 3 layers with 4 input nodes and 1 output node. As input model were t (time), Tg(i) (air temperature inside the greenhouse on time i), Tt(i) (temperature of nutrient solution in the tank on time i), Tb(i-1) (temperature of nutrient solution in the plant plots on time i-1) and as output model was Tb(i) (temperature of nutrient solution in the plant plots on time i). The model was developed well with validation result better than heat transfer model previously indicated by coefficient determination (R2) of 0.9498.Keywords: cooling, nutrient solution, hydroponic, tomato, artificial neural networkDiterima: 15 Juni 2010;Disetujui: 30 juli 2010