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Journal : Journal of Tropical Crop Science

Potassium Sources and Rates for Drip Irrigated Polyethylene Mulched Chilli Pepper Hamdani, Kiki Kusyaeri; Susila, Anas Dinurrohman; Purwono, Purwono; Suketi, Ketty
Journal of Tropical Crop Science Vol 6 No 02 (2019): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (365.497 KB) | DOI: 10.29244/jtcs.6.02.89-97

Abstract

Fertigation with drip irrigation is one of the technologies to solve fertilization and irrigation problems in chilli pepper production using polyethylene mulch. Potassium (K) is one of the important macro nutrients that affect plant growth and development due to its roles in the biochemical and the biophysical processes in plants. The objective of this study was to determine the best sources and the optimum rates of potassium for drip irrigated polyethylene mulched chilli pepper field production. The study was conducted in January until July 2018 at Tajur Experimental Farm, Center for Tropical Horticulture Study, Bogor Agricultural University. The experimental design was a split plot with the K sources (KCl, ZK, NPK) as main plots and K rates that consisted of five levels (0, 68, 136, 204, 272 kg K2O. ha-1) as sub-plots. The results showed that the best optimum rate of K to produce fruit is 101.11 kg K2O.ha-1 with a maximum yield of 2.26 t.ha-1. Chilli crops fertilized with NPK and KCl had the greatest fruit weight per plant, fruit weight per plot, and fruit weight per hectare.
Nitrogen Sources and Rate for Drip Irrigated Polyethylene Mulched Chilli Pepper Deli, Syekh Zulfadli Arofah; Susila, Anas Dinurrohman; Purwono, Purwono; Suketi, Ketty
Journal of Tropical Crop Science Vol 6 No 02 (2019): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (418.035 KB) | DOI: 10.29244/jtcs.6.02.112-120

Abstract

Chilli pepper is the one of most important vegetable crops in Indonesia, and nitrogen is an essential macronutrient ‎to support plant growth. This study was conducted to determine the best source of nitrogen (N) and its optimum rate ‎for drip irrigated polyethylene mulched chilli pepper at. The study site is located at ‎‎ Tajur II ‎Experimental Field of Center for Tropical Horticulture Studies Bogor Agricultural University, West Java, Indonesia, 250 m above the sea level (-6.6364580S, 106.8231460E) from January to August 2018. The experiments were organized in a factorial split-plot with sources of‎ N fertilizer as the main plots (Urea, ‎NPK, and ZA) and rates of N as a sub-plots (0, 115, 230, 345, and 460 kg.ha-‎‎1). The ‎results showed that NPK fertilizer had the best source of N compared to ‎other sources. The maximum yield of 9.01 kg per plot, or equivalent to ‎10.46 t.ha-1, was obtained with N fertilization at 265 to 295 kg.ha-1.‎
Sources and Rates of Potassium for Drip Irrigation of Polyethylene-mulched Bean Production Hulu, Versi Putra Jaya; Purnamawati, Heni; Susila, Anas Dinurrohman; Susanto, Slamet
Journal of Tropical Crop Science Vol 6 No 03 (2019): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (259.94 KB) | DOI: 10.29244/jtcs.6.03.182-192

Abstract

Common bean is a type of vegetable that can be consumed in the form of young pods. Potassium is one of the macronutrients needed to achieve maximum yield in common bean. Therefore this research is aimed at determining a suitable potassium source as well as an appropriate rate for drip irrigation in common bean using polyethylene mulch. The study was conducted from January to May 2018 at University Farm, IPB University. This experiment was set up as a nested randomized block design with two factors i.e. potassium sources as the main factor ( KCl, ZK, and NPK), and potassium rates (0, 37.5, 75, 112.5, 150 kg of K2O per ha). Fertilizer rates were nested in the main factor and fertilizers were applied Fertilization through a drip irrigation fertigation system with emitters placed close to the roots of plants. Fertilizer sources had significant effects on the variables of growth and bean yields. NPK resulted in a better growth and yield compared with KCl and ZK. Fertilizer sources that have very significant effect were likely related to the shape and solubility of the fertilizers, the ease of application, and also completeness of nutrient content in fertilizer. Based on the pod weight per plot, the productivity per hectare of bean pods produced in this study reached 7.52 ton.ha-1. Potassium (K2O) rate did not have significant effects on the variables of growth and yields of the bean.
Increasing Cauliflower Yields through Fertigation Majesta Esa Sofian; Anas Dinurrohman Susila
Journal of Tropical Crop Science Vol. 5 No. 1 (2018): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (246.538 KB) | DOI: 10.29244/jtcs.5.1.1-5

Abstract

Cauliflower is one the important vegetable crop in the tropics; the curd contains high fibres, potassium, carotene and vitamin C. However, the production and productivity of cauliflower in Indonesia has been low and cannot meet the demand, resulting in high importation of cauliflowers into Indonesia. Bogor Agricultural University has developed potential lowland cauliflower genotypes, BOB017 and BOB020, with higher productivity. In this study, we evaluated three fertigation methods on the growth, yield and economic returns of the two lowland cauliflower genotypes.  The experiment was arranged in a split-plot design with four replications. The main plot contained two cauliflower genotypes, BOB017 and BOB020. The subplot was three fertilizer application methods: through drip irrigation, soil drench, and drilled. The results showed that BOB020 had an earlier harvest time (60 days) compared to BOB017 (71 days). The soil drench fertigation method showed the highest curd weight (351.64 g), curd diameter (14.65 cm) and yield (12.39 t.ha-1) compared to the other two fertigation methods. The BOB017 genotype fertilized with soil drench method resulted in the highest B/C ratio (3.32). The study concluded that growing cauliflower using the soil drench method resulted in the optimum growth of cauliflower, high yield and net income.
Spray Hose Irrigation System Increased Yield of Polyethylene Mulched Shallot Raka Daniel Lihardo Sumbayak; Anas Dinurrohman Susila
Journal of Tropical Crop Science Vol. 5 No. 2 (2018): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (470.71 KB) | DOI: 10.29244/jtcs.5.2.49-54

Abstract

Spray hose is a micro-irrigation system using perforated hose as for micro irrigation. Shallot conventional cultivation requires lots of water and labor man days therefore is more efficient. Shallot cultivation system needs to be developed to increase yield and to reduce production cost. This research was conducted to compare conventional cultivation methods with using Spray hose and polyethylene mulch for shallot production. This research was conducted in a hydromorphic alluvial soil type at the Center for Tropical Horticulture Studies Field Station in Kersana, Brebes, Central Java (S 6 o, 55’, 20.536”; E 108o, 51”, 50618”) from May to July 2016. The experiment was arranged in a randomized complete block design (RCBD) with a single factor and three levels of planting system, i.e. conventional ‘Surjan’ system without mulch, one line spray hose with mulch, and two lines spray hose with mulch, with five replications. The result showed that shallots production using of polyethylene mulch and two-line spray hose had higher yields than the conventional method. In addition, this system is more efficient in terms of labor requirement. Cost Revenue Analysis shows that conventional cultivation R/C ratio was 1.72, one-line spray hose R/C ratio was 1.92, while two-line spray hose was 2.26. This study demonstrated that the use of polyethylene mulch combined with two-line spray hose significantly improved shallot growth and increased bulb production, and more cost efficient.Keywords: R/C ratio, micro irrigation, labor, ‘Surjan’ system, soil drench, fertilizerConclusionIrrigation of shallot with two-line spray hose resulted in a better crop growth and a higher yield than conventional planting system and one-line spray hose for polyethylene mulched shallot.  Conventional planting system using more water and labor requirement than the two other treatments. Combination of  two-line spray hose and polyethylene mulch had the most eficient cost production of shalot compared to the  conventional system and one-line spray hose.
Production of Fruits and Leafy Vegetables Solanum nigrum Linn under Different Shade Levels Nani Yulianti; Edi Santosa; Anas Dinurrohman Susila
Journal of Tropical Crop Science Vol. 5 No. 2 (2018): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (557.531 KB) | DOI: 10.29244/jtcs.5.2.64-72

Abstract

Fruits and young shoot of Solanum nigrum Linn are harvested and consumed as indigenous vegetables by different Indonesian ethnics. Preharvest factors and harvesting methods to maximize the quality of S. nigrum produce is still unknown. In this study S. nigrum was grown in full irradiance and under shading and assessed for their growth, and fruit and shoot yields. The experiment was conducted at the Leuwikopo Experimental Farm in Bogor Agricultural University, Indonesia from April-July 2017. The results demonstrated that plants produced more fruits and shoots in full irradiance, i.e., 687.9 g and 211.1 g per plant, whereas only 331.1 g and 116.9 g per plant were produced in 50% shading. Although fruit and shoot production were superior under full irradiance, shoot-harvested plants had healthier leaves and life span of about 2 months longer thus facilitating longer availability. Canopy of shoot-harvested plants formed a columnar shape with 23 to 45 cm in height,  in contrast to spherical shape with 48 to 203 cm in height of the fruit-harvested plants. It is likely that shading level might contribute to farmers’ decision to harvest the shoots or fruits of S. nigrum. Further studies are needed to determine the effects of shading levels on nutritional quality of the shoots and fruits of S. nigrum.  Keywords: African nightshade, canopy architecture, harvesting method, indigenous vegetable, intercropping
Potassium Fertilizer Application Rates for Fertigated Edamame Grown on Low-K Soils Fitri Alfiyah; Purnamawati, Heni; Purwono; Susila, Anas Dinurrohman
Journal of Tropical Crop Science Vol. 11 No. 03 (2024): 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.11.03.320-328

Abstract

Edamame, a legume consumed fresh as a vegetable, is highly nutritious, particularly protein-rich, and holds significant economic value. However, its cultivation faces challenges, especially on dry land, due to water scarcity and limited nutrient availability, particularly potassium (K). This study, which investigated the impact of potassium fertilization rate on edamame cultivation, underscores the need for further research. The study utilized a single factor, potassium fertilization rate, arranged in a completely randomized block design. Potassium rates consist of 0% X, 50% X, 100% X, 150% X, and 200% X, where X represents the recommended potassium fertilization rate according to the dry soil test device (DSTD) guidelines. Each treatment was replicated five times. Data were analyzed using ANOVA at a 5% significance level, and any significant effects were further examined using orthogonal polynomial and regression analysis. The results indicated that potassium fertilizer rates did not significantly affect edamame height, pod weight per plot, and marketable yield. However, the study identified the optimal potassium fertilizer rate, which was between 83%X and 119%X, equivalent to 83–119 kg.ha⁻¹ of KCl (50–72 kg.ha⁻¹ of K₂O). This range positively increased total branch yield, productive branches, number of flowers, pod weight per plant, number of pods per plant, and plant dry weight, producing a quadratic response pattern. The study recommends further research to optimize potassium fertilizer doses based on DSTD recommendations, particularly at a low K nutrient status, to maximize marketable yields through fertigation.
Analysis of the Morphology and Secondary Metabolite Content of Several Katuk (Sauropus androgynus) Accessions Hakiki, Firdha Annisa; Masruroh, Qibtiyatul; Kartika, Juang Gema; Susila, Anas Dinurrohman; Kyoung, Cheong Min; Rahmah, Yulia
Journal of Tropical Crop Science Vol. 12 No. 03 (2025): 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.12.03.639-646

Abstract

Katuk (Sauropus androgynus) is a species valued for its nutritional and medicinal properties, as well as its potential applications in food, herbal medicine, livestock feed, and cosmetics. This study aimed to evaluate the morphological diversity and secondary metabolite profiles of four katuk accessions. Two analyses were conducted: (1) morphological characterization using cluster analysis and (2) qualitative and quantitative assessment of secondary metabolites. Cluster analysis revealed that all accessions showed high similarity with the “Paris”, an accession widely grown in West Java, Indonesia (similarity coefficient = 1.00), and moderate similarity with accessions “K1”, “K2”, “K4”, “Bastar”, and “Zanzibar” (distance coefficient = 0.68). Metabolite profiling indicated variations in compound abundance among accessions. “Ciaruteun Ilir 1” exhibited the highest vitamin E content; “Ciaruteun Ilir 2” had the highest fatty acid and phenolic content; “Pager Jangkung 1” accumulated the most flavonoids, while “Pager Jangkung 2” contained the most terpenoids and carboxylic acids. The leaves of katuk accessions in this study contains 14-17% squalene; this is an important finding for the pharmaceutical and health industries.
Chili Yields, Nutrient Use, and Water Use Efficiency under Precision Fertigation at Different Plant Density and Drip Irrigation Lines Susila, Anas Dinurrohman; Suketi, Ketty; Purnamawati, Heni; Rusdan, Risna
Journal of Tropical Crop Science Vol. 12 No. 03 (2025): 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.12.03.594-603

Abstract

The study aimed to evaluate the effects of irrigation line number and plant density on the growth and yield of curly red chili pepper (Capsicum annuum L.) cv. Tangguh. The study was conducted from August 2023 to January 2024 at the Cikarawang Experimental Station of IPB University (6°32’56” S; 106°43’54” E; 240 m above sea level) on Ultisol characterized by severely low phosphorus (1.1 ppm) and high potassium content (66 ppm). A split-plot design within a randomized complete block design was employed, with irrigation line number (single or double drip lines per bed) as the main plot and four planting densities (26,666, 53,322, 80,000, and 106,666 plants.ha-1) as subplots. Each treatment was replicated three times, resulting in 24 plots (each 1.5 m × 10 m). Fertilizers applied included Urea (45% N), SP-36 (36% P2O5 ), cattle manure, dolomite, biofertilizers (Trichoderma spp.), and PGPR. Irrigation and fertigation were managed using the Nutrigads automatic drip system. The data collected included plant growth, yield components, nutrient use efficiency, water use efficiency, and partial factor productivity for nitrogen (N) and phosphorus (P). The results showed that the irrigation line number had no significant effect on individual plant growth parameters. However, using double lines significantly increased total fruit yield per bed and hectare, indicating its contribution to overall productivity. Conversely, the double line system reduced water use efficiency (WUE = 2.07 kg.mm-1) compared to the single line system (WUE = 3.64 kg.mm-1; P<0.0001). Higher planting densities (up to 106,666 plants.ha-1) enhanced total yield by promoting vertical growth but reduced individual plant performance, and had a positive effect on WUE, NUE, and PUE.
Evaluation of Silica Uptake from Foliar-Applied Silicon Nanoparticles in Melon (Cucumis melo L.) under Soilless Culture Badrieh, Haian Amin; Widodo, Winarso Drajad; Susila, Anas Dinurrohman; Suwarno, Willy Bayuardi
Journal of Tropical Crop Science Vol. 8 No. 03 (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.8.03.135-145

Abstract

Melon (Cucumis melo L.) is a fruit commodity that gets a great interest to be developed in Indonesia and has a high nutritional value. However, the fungal infection and pathogens in melon cultivation are considered significant problems that are difficult to manage. Therefore, efforts are needed to improve the productivity and quality of melon and prevent pest and disease attacks. One mineral nutrient that is assumed to enhance plant resistance and increase the quality and production of melon is silica. The purpose of the research was to evaluate silica absorption from foliar-applied silicon nanoparticles in melon under soilless culture and improve melon fruit's growth and quality by applying silica fertilizer. The experimental design used was a split-plot randomized complete block design 3 x 2 factorial pattern with four replicates. The main plot factor is silica fertilizer (Novelgro, water-soluble), consisting of three silica concentrations of 0.67; 1.33 ppm, and control. The spray volume of each treatment was 160 ml per plant with seven days' intervals and a frequency of three times. The subplot factor is melon varieties consisting of “Alisha” and “Glamour”. The findings showed that silica fertilizer significantly increased the plant height, stem diameter, internode length, total number of hermaphrodite flowers, number of hermaphrodite flowers that are swelling, while decreased the fruit moisture content and gave the best average fruit position. Instead, The “Glamour” variety gave the best response to plant growth and fruit quality. Moreover, the melon plant could absorb silica in the low category (<1% Si). The highest silica contents were found in the “Alisha” cultivar leaves and the “Glamour” cultivar's rinds treated with the silica concentration of 1.33 ppm as much as 0.34% and 0.30%, respectively.
Co-Authors , Amisnaipa ,, Sopiana A. HAITAMI Adji, Ibnu Surastyo Adolf P. Lonto Adolf Pieter Lontoh, Adolf Pieter Alghifari, Ahmad Fadli Alveno, Vitho Amanah, Mar'atus Sholihatul Amanda Sari Widyanti Angga Agung Gumelar Anita Maryam Aris Aprilianto Arisa Noguchi, Arisa Atang Sutandi Awang Maharijaya Azzuhdy, Muhammad Zakiyuddin Siroj Badrieh, Haian Amin Budi Nugroho Chin-Hua Ma Christian, Ramot D. Wasgito Purnomo Deli, Syekh Zulfadli Arofah Dermawan, Rahmansyah Dermawan Desi Hernita Dewa Gede Wiryangga Selangga Dewa Gede Wiryangga Selangga Dhika Prita Hapsari Dian Diani Tanjung Didy Sopandie Diny Dinarti Donatila Faranso Dwi Guntoro Edi Santosa Eko Sulistyono Endang Gunawan Endang Wijayanti Faqih Udin Febrianto, Miftakhur Rizki Hidayat Fita Lita Ramadiani Fitri Alfiyah Habibi, Irfan Hakiki, Firdha Annisa Hamdani, Kiki Kusyaeri Hati, Helena A P Haveel Luthfyrakhman Haveel Luthfyrakhman Herry Suhardiyanto Hulu, Versi Putra Jaya Jatsiyah, Venti Jian Ayu Pratiwi Juang G. Kartika Juang Gema Kartika Ken Takahata, Ken Ketty Suketi Krisantini Krisantini , Krisantini Kyoung, Cheong Min La Ode Safuan Lutfi Izhar Majesta Esa Sofian Manuel Celiz Palada Maryam, Anita Masruroh, Qibtiyatul Mathias Pratama Muhamad Syukur Munif Ghulamahdi Nani Yulianti Nicha Muslimawati Nobuo Sugiyama Nobuo Sugiyama Odit Ferry Kurniadinata Oktavia, Adea Paramyta Nila Permanasari Prathama, Mathias Purwono Purwono Purwono, Purwono Rahanita, Prima Rahmah, Yulia Rahmat Hadi Wibowo Rahmi Fauziah Raka Daniel Lihardo Sumbayak Rhoedy Poerwanto rina ekawati Risna rusdan Rizqi Utami Nugraha Roedhy Poerwanto Rykson Situmorang S Anwar Salvadore J. Locascio Sintho Wahyuning Ardie Siti Halimah Slamet Susanto Sobir Sobir Sofyan Zaman SRI HENDRASTUTI HIDAYAT SRI RAHAYU Sugiyanta Suryo Wiyono TAKAHISA MATSUOKA Tarigan, Hardi Satria Vivit F. Alviana Wibowo, Rahmat Hadi Wika Anrya Darma, Wika Anrya Willy Bayuardi Suwarno Winarso D. Widodo Wirabawana, Bartolomeus Varian Yuliharsa Yohanes Bayu Suharto Yoko Mine Yoko Mine Yudi Chadirin YULIN LESTARI Yuni Koerniawati