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PENGARUH PENDINGINAN DAERAH PERAKARAN TERHADAP PRODUKSI CABAI (CAPSICUM ANNUUM L.) DI DALAM RUMAH TANAMAN KAWASAN TROPIKA Amaliah, Wenny; Syukur, Muhamad; Suhardiyanto, Herry
Jurnal Hortikultura Indonesia Vol. 9 No. 2 (2018): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (392.329 KB) | DOI: 10.29244/jhi.9.2.139-147

Abstract

ABSTRACTCultivation of chili plants in the tropical greenhouse requires cooling as a solution of high temperature inside the greenhouse. One of the cooling system can be applied is root zone cooling. The aim of this research is to apply root zone cooling system to cultivation of chili plant in tropical greenhouse with substrate system, and to know the influence root zone cooling system on growth and productivity of chili plant. Plants are cultivated with a hydroponics substrate system using a drip irrigation system where the cooling pipe is buried inside the substrate medium. First treatment is cooling the root zone with cooled water and the substrate temperature of root zone cooling was 14.1-26.9 0C (CH treatment). Second treatment is cooling the root zone with no cooled water (ambient temperature), and the substrate temperature was 24.8-34.2 0C (NC treatment). The air temperature inside greenhouse was 29.4 0C and 24.7 0C, day and night. Due to lack of intensity of sunlight into the greenhouse, the plants sustain etiolating. However CH treatment produced higher fruit weight per plant compared with NC treatment. The weight of fruit per plant is 873.60 g and 546.00 g, for CH and NC respectively. The fruit size in the CH treatment also produced longer and heavier fruits than the NC treatment.Keywords: hydroponics of pepper, productivity, root temperatureABSTRAKBudidaya tanaman cabai di dalam rumah tanaman daerah beriklim tropis membutuhkan pendinginan sebagai solusi tingginya suhu udara di dalam rumah tanaman. Pendinginan yang dapat diterapkan salah satunya yaitu dengan pendinginan terbatas di daerah perakaran. Penelitian ini bertujuan untuk menerapkan teknik pendinginan daerah perakaran pada budidaya tanaman cabai di dalam rumah tanaman iklim tropika basah dengan sistem substrat, serta untuk mengetahui pengaruh pendinginan daerah perakaran pada pertumbuhan dan produktivitas tanaman cabai. Tanaman dibudidayakan dengan sistem hidroponik substrat dan sistem irigasi tetes yang di dalam media tanam dibenamkan pipa pendingin. Perlakuan pertama adalah pendinginan daerah perakaran dengan air yang didinginkan dan suhu media tanam yang didinginkan berkisar antara 14.1-26.9 0C (perlakuan CH). Perlakuan kedua adalah pendinginan daerah perakaran dengan air yang tidak didinginkan (suhu lingkungan) dengan kisaran suhu media tanam sebesar 24.8-34.2 0C (perlakuan NC), dengan suhu udara rata-rata 29.4 0C pada siang hari dan 24.7 0C pada malam hari. Tanaman mengalami etiolasi akibat kurangnya intensitas cahaya matahari yang masuk ke dalam rumah tanaman. Perlakuan CH menghasilkan bobot buah per tanaman yang lebih tinggi dibandingkan dengan perlakuan NC. Bobot buah per tanaman sebesar 873.60 g dan 546.00 g, untuk CH dan NC berturut-turut. Ukuran buah pun pada perlakuan CH menghasilkan buah yang lebih panjang dan lebih berat dari pada perlakuan NC.Kata kunci: hidroponik cabai, produktivitas, suhu zona perakaran
PRODUKSI BENIH KENTANG SISTEM AEROPONIK DAN ROOT ZONE COOLING DENGAN PEMBEDAAN TEKANAN POMPA DI DATARAN RENDAH Sumarni, Eni; Sudarmaji, Arief; Suhardiyanto, Herry; Saptomo, dan Satyanto Krido
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 44 No. 3 (2016): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (516.529 KB) | DOI: 10.24831/jai.v44i3.12855

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ABSTRACTNutrition  pumps  pressure is important in aeroponic. Optimal  pump  pressure produces well oxygenation, so that increases the dissolved oxygen content in the nutrition. It is good for plant roots. The purpose of this study was to determine pump pressure on the growth and yield  potato seeds grown in aeroponics in lowland 125 m asl with root zone cooling. This study used a randomized block design non factorial. Data were analyzed using analysis of variance followed by a further test of orthogonal contrasts at the level of ? = 5%. Results showed that different pump pressure on the provision of nutrient, temperature cooling in the root zone gave different results on the number of potato tubers per plant and weight per tuber in each variety. Root zone cooling temperature 15 °C, the pump pressure> 1.5 atm produce highest number of tubers per plant, i.e. 11.8 tuber of Granola variety and 8.2 tuber of Atlantic variety.  The was no tuber produced from control (without referigeration). The highest weights per tuber (10.35 and 5.01 g for Atlantic and Granola variety, respectively) were reached with cooling temperature at 15 °C and the pump pressure > 1.5 atm.Keywords: evaporative cooling, hydroponics, potato, tuber, variety     
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

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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
PHOTOSYNTHETIC RATE OF LETTUCE CULTIVATED ON FLOATING RAFT HYDROPONIC WITH CONTROLLED NUTRIENT SOLUTION Lenni, Lenni; Suhardiyanto, Herry; Seminar, Kudang B.; Setiawan, Radite P. A.
HAYATI Journal of Biosciences Vol. 27 No. 1 (2020): January 2020
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.27.1.31

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Lettuce becomes the main ingredient of salad as one of the healthy foods. The lettuce cultivation in tropical areas is often performed in highland. To reduce soil erosion and pesticide contamination, the cultivation of lettuce plants in high open land needs to be reduced. The lettuce cultivation in hydroponic system at tropical lowland requires cooling. The root zone cooling requires enormous electrical energy. However, it can be solved by controlling the temperature based on the automatically. Therefore, it has been developed control and monitoring system for the root zone on floating raft hydroponic system. This study aimed to evaluate the photosynthetic rate of lettuce cultivated in floating raft hydroponic system whose nutrient solution was controlled by the developed control and monitoring system. Statistical analysis was performed to draw the conclusions about photosynthetic variance of lettuce on two hydroponic systems, namely controlled and uncontrolled system. Furthermore, this paper presents an artificial neural network (ANN) model to estimate the photosynthetic rate of lettuce cultivated in the hydroponic systems. The ANN model was comprised of eight input (nutrient temperature, EC, pH, DO, and ORP, air temperature, air humidity, and photon flux density of photosynthetic) and one output (photosynthetic rate). It was noted that the ANN model predicted accurately the photosynthetic rate of lettuce leaves whose R2 was 0.87 for plants cultivated in floating raft hydroponic system whose nutrient solution was controlled by control and monitoring system. The ANN was useful for identifying the photosynthetic rate of lettuce cultivated in floating raft hydroponic systems on tropical lowland.
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 : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (63.676 KB) | DOI: 10.24831/jai.v36i1.1361

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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
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

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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
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 : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (372.779 KB) | DOI: 10.24831/jai.v41i2.7522

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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
PENENTUAN WAKTU PENGGUNAAN WATER CHILLER PADA TANAMAN KENTANG BERDASARKAN SEBARAN SUHU DAERAH PERAKARAN Ciptaningtyas, Drupadi; Zaqlul, Iqbal; Suhardiyanto, Herry
TEKNOTAN Vol 11, No 1 (2017): TEKNOTAN, April 2017
Publisher : Fakultas Teknologi Industri Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jt.vol11n1.10

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Perbedaan suhu lingkungan sekitar 7°C, antara dataran rendah dan dataran tinggi adalah salah satu kendala untuk menanam tanaman dataran tinggi di dataran rendah. Oleh sebab itu, banyak metode digunakan untuk menyesuaikan kondisi tersebut, salah satunya adalah aplikasi water chiller untuk menurunkan suhu larutan nutrisi. Hingga saat ini aplikasi water chiller belum optimum, karena umumnya water chiller dibiarkan bekerja sepanjang hari selama 24 jam, tanpa mempertimbangkan kondisi lingkungan mikro tanaman yang sebenarnya. Penelitian ini bertujuan untuk mengoptimalkan penggunaan water chiller pada tanaman kentang yang ditanam di dataran rendah, dengan menentukan waktu penggunaan water chiller berdasarkan sebaran suhu media tanam yang disimulasikan dengan Computational Fluid Dynamic (CFD). Penelitian dimulai dengan membuat simulasi CFD oleh bantuan software Solidworks 2011 yang terdiri dari tahap pre-processing, solving, dan post-processing. Hasil penelitian menunjukkan, water chiller untuk tanaman kentang hanya perlu diaktifkan dari pukul 08.00 hingga pukul 17.00, karena hanya pada rentang waktu tersebut suhu daerah perakaran melebihi suhu optimum pertumbuhan tanaman kentang.Kata kunci: arang sekam, simulasi fluida, CFD, tanaman kentang, sebaran suhu
SIFAT THERMO-FISIK ARANG SEKAM Ciptaningtyas, Drupadi; Suhardiyanto, Herry
TEKNOTAN Vol 10, No 2 (2016): TEKNOTAN, November 2016
Publisher : Fakultas Teknologi Industri Pertanian

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Abstract

Efisiensi penggunaan water chiller di wilayah tropis, masih sangat rendah sehingga perlu dilakukan upaya peningkatan. Hal tersebut dapat dilakukan dengan cara mengidentifikasi sebaran suhu media tanam didaerah perakaran di waktu-waktu kritis, agar diketahui kapan sebaiknya water chiller digunakan. Sebaran suhu suatu media tanam dapat disimulasikan dengan computational fluid dynamic (CFD) setelah beberapa sifat thermo-physic media tanam tersebut diketahui. Pada penelitian ini, lima sifat thermo-physic media tanam arang sekam diukur, dihitung, dan dianalisis. Kelima sifat tersebut adalah massa jenis, porositas, panas jenis, konduktivitas panas, dan pressure drop. Hasil penelitian menunjukkan nilai-nilai karakteristik thermo-physic arang sekam adalah sebagai berikut; massa jenis 153.24 kg/m3, porositas 46%, konduktivitas panas 0.0719 W/mK, dan panas jenis 7.932 kJ/kg°C, sedangkan nilai pressure drop arang sekam menurun seiring dengan peningkatan debit fluida yang dialirkan. Kata kunci: arang sekam, simulasi fluida, CFD, sifat thermo-physic
SEBARAN SUHU DAERAH PERAKARAN PADA SISTEM HIDROPONIK UNTUK BUDIDAYA TANAMAN CABAI DI KAWASAN TROPIKA Amaliah, Wenny; Suhardiyanto, Herry; Syukur, Muhamad
Jurnal Keteknikan Pertanian Vol. 7 No. 1 (2019): JURNAL KETEKNIKAN PERTANIAN
Publisher : PERTETA

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Abstract

AbstractChili production in Indonesia is very unstable because most of chili production areas are open field that are quite influenced by weather. Therefore, it is important to develop hydroponic technology for chili cultivation under greenhouse. As energy-efficient cooling system for tropical greenhouses, root zone cooling could be applied by flowing cooled water in pipes that are burried in the root zone. Determining the space between the pipes for flowing the cooled water requires temperature distribution in the root zone. The objective of this research were to find out the temperature distribution in the root zone, to simulate temperature distribution with based on computational fluid dynamics, and to validate the simulated root zone temperature. The results showed that an uniform horizontal temperature distribution during the day time and night time. Uniform verticaltemperature distribution were also noted during the night time. There were quite wide temperature variation in the root zone during the day time, vertically. The validation results showed that temperature distribution in the root zone could be predicted accurately by computational fluid dynamics as indicated by the value of R2 obtained at 0.84 and the linear equation is y axis approaches the value of x axis. Therefore, the predicted temperature distribution would be very useful in determining zone cooling system for chili cultivation in hydroponic system under tropical greenhouse.AbstrakProduksi cabai di Indonesia sangat tidak stabil karena sebagian besar areal budidaya tanaman cabai dilakukan di lahan terbuka yang sangat dipengaruhi oleh cuaca. Oleh karena itu, penting untuk mengembangkan teknologi hidroponik untuk budidaya tanaman cabai di dalam rumah tanaman. Metode pendinginan yang efisien dari segi konsumsi energi untuk rumah tanaman di daerah tropika salahsatunya adalah pendinginan daerah perakaran. Pendinginan daerah perakaran dapat diterapkan dengan mengalirkan air dingin di dalam pipa yang dibenamkan dalam daerah perakaran tersebut. Penentuan jarak antar pipa pendingin tersebut memerlukan sebaran suhu di daerah perakaran tersebut. Tujuan daripenelitian ini adalah untuk memprediksi sebaran suhu daerah perakaran, melakukan simulasi suhu daerah perakaran menggunakan computational fluid dynamics, dan melakukan validasi hasil simulasi sebaran suhu daerah perakaran. Hasil penelitian menunjukkan bahwa sebaran suhu daerah perakaran secara horizontal ternyata seragam pada waktu siang maupun malam hari. Data sebaran suhu daerah perakaran yang seragam secara vertikal juga diperoleh pada waktu malam hari. Sebaran suhu daerah perakaran secara vertikal pada siang hari ternyata cukup bervariasi. Validasi menunjukkan bahwa sebaran suhu daerah perakaran dapat diprediksi dengan baik menggunakan computational fluid dynamics yang ditunjukkan dengan nilai R2 yang diperoleh sebesar 0.84 dan diperoleh persamaan y yang mendekati nilai x. Oleh karena itu, suhu daerah perakaran hasil prediksi dapat digunakan untuk perancangan zone cooling system budidaya tanaman cabai secara hidroponik di dalam rumah tanaman.