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INDONESIA
Planta Tropika
Published by Universitas Muhammadiyah Yogyakarta
ISSN : 0216499X     EISSN : 25287079     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
PLANTA TROPIKA : Jurnal Agrosains (Journal of Agro Science) provides a forum for researchers on applied agricultural science to publish the original articles. PLANTA TROPIKA published two times a year (February and August) by Universitas Muhammadiyah Yogyakarta in collaboration with Indonesian Association of Agrotechnology / Agroecotechnology (PAGI). Planta Tropika focuses related to various themes, topics and aspects including (but not limited) to the following topics Agro-Biotechnology, Plant Breeding, Agriculture Waste Management, Plant Protection, Soil Science, Post Harvest Science and Technology, Horticulture.
Arjuna Subject : -
Articles 427 Documents
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Comparison of destructive and non destructive method in maturity index of Garcia mangostana Prabasari, Indira
PLANTA TROPIKA: Jurnal Agrosains (Journal of Agro Science) Vol 6, No 2 (2018)
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/pt.2018.086.100-105

Abstract

Postharvest maturity index for mangosteen (Garcinia mangostana L) is very important for picking and grading during postharvest processing. Skin color change is the primary maturity index for mangosteen. However, determination using human eyes needs many skilled labours and is inconsistent. Therefore, new method in image processing technology using SVM (Support Vector Machine) was employed in this study. Chemical analysis of mangosteen was performed and used as a reference of SVM method. The chemical analysis of mangosteen showed that anthocyanin content increased from 126.20 ppm at stage 1 to 213.98 ppm at stage 6. Reducing sugar content increased from 3.17% at stage 1 to 7.92% at stage 6. The same pattern was found for total soluble solid, an increase from 3.86% at stage 1 to 7.81% at stage 6. Whereas for total acid content and hardness the pattern was the opposite. Total acid content was decreased from 1.78% at stage 1 to 1.06% at stage 6 and the fruit hardness of mangosteen was also declined, showing the number from 4.30 N at stage 1 to 0.69 N at stage 6. For SVM method, image aquisition was conducted for mangosteen images from stage 1 to stage 6, followed by color feature extraction for each stages. The result was trained and tested using SVM and resulted accuracy level of 83.3%. 
Growth Performance of Mature Trees Resulted from Intra and Inter-specific Grafting on Robusta Coffee Evizal, Rusdi; Sugiatno, Sugiatno; Utomo, Setyo Dwi; Pujisiswanto, Hidayat; Widagdo, Setyo; Prasmatiwi, Fembriarti Erry; Stiawan, Aresta Dwi
PLANTA TROPIKA: Jurnal Agrosains (Journal of Agro Science) Vol 6, No 2 (2018)
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/pt.2018.083.77-83

Abstract

To improve yield and cup quality, mature coffee tree as rootstock could be grafted with scion of selected genotype. This research aimed to study growth performance of mature trees resulted from intra and inter-specific grafting on Robusta coffee. The research was arranged in Randomized Complete Block Design with 3 replications. There were 12 treatments of entrees/under-stump genotype for coffee grafting including 8 treatments of intraspecific local Robusta/Robusta grafting and 4 treatments of interspecific coffee grafting of Robusta/Liberica and Arabica/Robusta. The results showed that intraspecific grafting of Robusta/Robusta, Robusta/Liberica, and Arabica/Robusta resulted in grafting mortality of 9.8%, 10.9%, and 24.8%, respectively. Until 28 weeks after grafting, branch growth variables were significantly affected by scion/rootstock of Robusta/Robusta, Robusta/Liberica, and Arabica/Robusta grafting. Grafted Arabica/Robusta coffee showed the poor growth performance. In second year of Robusta/Robusta and Robusta/Liberica growth, generative growth of cherry inflorescence per branch and number of cherries per inflorescence were not affected by scion and rootstock genotypes. Leaf and branch growth were very important variables correlating with other variables.
Physiological Aspects of Cauliflower Plants Affected by Fertigation Intervals and Doses of Various Inter - Season Soil Ameliorants in Coastal Sandy Land Junaedi, Mahbub; Saparso, Saparso; Rif'an, Muhamamad
PLANTA TROPIKA: Jurnal Agrosains (Journal of Agro Science) Vol 6, No 2 (2018)
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/pt.2018.084.84-91

Abstract

Cauliflower is one of vegetable commodities mostly consumed. The study aimed to determine fertigation interval and application of soil ameliorants including the types, doses, and frequency that are appropriate for the growth and productivity of cauliflower plants in coastal sandy land. The research was carried out in the sandy beach area of Jetis, Banjarsari Village, Nusawungu District, Cilacap Regency from April 2017 to September 2017. The study was arranged in Randomized Complete Block Design (RCBD) factorial split plot. Data were analyzed by ANOVA followed by DMRT at 5 %. The results showed that (1) the fertigation interval did not significantly affect the growth, yield and physiology variables of cauliflower plants; (2) the frequency of soil ameliorants application had significant effect on the variable growth and yield of cauliflower plants. The application of soil ameliorants every season gave the best results compared to application every two seasons; (3) the application of soil ameliorants of Vertisol soil and manure could increase growth and yield variables compared but did not affect the physiology of cauliflower plants.
Effects of Plant Media And Fertilization on The Growth of Orchid Plant (dendrobium sylvanum rchb. F.) in Acclimatization Phase Hariyanto, Sucipto; Jamil, Ahmad Ridlwan; Purnobasuki, Hery
PLANTA TROPIKA: Jurnal Agrosains (Journal of Agro Science) Vol 7, No 1 (2019)
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/pt.2019.095.66-72

Abstract

This study was to evaluate the effect of plant media variation, time of fertilization, and combination of both on the growth of orchid plant Dendrobium sylvanum Rchb. f. in acclimatization phase. This study was designed using 6x4 factorial experimentation. The first factor was the variation of plant media: charcoals, coconut husk, bagasse, mixing of charcoal and coconut husk, combination of charcoal and bagasse, combination of coconut husk and bagasse. The second factor was fertilization time: no fertilization, 7 day-fertilization, 14 day-fertilization, and 20 day-fertilization for three months. The data were analysed by using Two Way MANOVA (α = 5%) and Duncan test. Based on the results, there were differences between media variation and fertilization time on the increase of leaf length and width, stem diameter, and root length of Dendrobium orchid in acclimatization phase. Combination of bagasse and coconut husk media showed the best result on media treatment. The best of fertilization time was 14 days. Moreover, the best of interaction between media and fertilization time showed by the combination of bagasse and coconut husk with 14 days-fertilization.
Response of Black Madras Purple Rice to Pruning and Application of Unitas Super Liquid Organic Fertilizer Jamilah, Jamilah; Haryoko, Widodo; Akriweldi, Weki
PLANTA TROPIKA: Jurnal Agrosains (Journal of Agro Science) Vol 7, No 1 (2019)
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/pt.2019.090.26-32

Abstract

Indonesian rice yields are still relatively low. One of the efforts to increase the yield of rice plants is to trim the foliages before flowering, in addition to the application of ‘Unitas Super’ liquid organic fertilizer (LOF). The study was carried out in the Lubuk Lintah Village, Padang City in May - September 2017. The aim of the study was to investigate the effectiveness of pruning, as a source of forage, and the concentration of ‘Unitas Super’ liquid organic fertilizer in improving rice yields. The experiment was arranged in split plot design with main plots consisting of 2 levels, namely pruning at 45 days and without pruning. The subplots consisted of 3 concentrations of ‘Unitas Super’ liquid organic fertilizer, namely 0 ml L-1, 50 ml L-1, and100 ml L-1. All treatments were replicated 3 times. Data were analyzed statistically using the F test at 5% and tested using LSD at 5%. According to the results of the observations, it can be concluded that pruning reduced the weight of 1000 seeds and panicle length, but did not reduce the yield of harvested dry grain and harvest index. Application of ‘Unitas Super’ liquid organic fertilizer did not significantly increase the growth and yield of Black Madras purple rice. The highest dry grain yield was 4.04 t ha-1 observed in plants sprayed with 50 ml L-1 ‘Unitas Super’ liquid organic fertilizer without pruning treatment.
Effects of Combination of Inorganic and Organic Fertilizers Application on Morphology and Physiology of Immature Oil Palm Fuady, Zahrul; Satriawan, Halus; Agusni, Agusni
PLANTA TROPIKA: Jurnal Agrosains (Journal of Agro Science) Vol 7, No 1 (2019)
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/pt.2019.096.73-81

Abstract

Oil palm requires nutrients both macro and micro nutrients for its growth and development processes. This study aimed to study the morphological and physiological responses of immature oil palm plantations at 1 year of planting to the provision of organic fertilizer and micro fertilizers as a complement to inorganic fertilizers.The research was arranged in a Randomized Completely Block Design (RCBD). The treatment applied consisted of 7 treatments, namely one control treatment (basic fertilizer) and six treatments from a combination of type and dose of fertilizer, consisting of single fertilizer, compound fertilizer, organic fertilizer and micro fertilizer. Based on the results, single and compound fertilizers accompanied by micro fertilizers (M1a, M1b) had a significant effect on plant height showing 13.78%, 27.55%, 25.11%, and 54.18% higher than others andon length and width of the 9th midrib reaching 7.47%, 22.40% and 51.04% better than others. The best response of growth of stem circumference at 6 MAT was observed in PO1 reaching 112.43%, better than M1a (111.96%)and M1b (109.20), while the lowest was observed in PO0 (97.84%). Meanwhile, chlorophyll and stomata were implied by a package of compound fertilizer and single fertilizer. The highest leaf chlorophyll content was in the M0a fertilizer treatment, while the highest stomata level was in the M1a treatment.
Effects of Ascorbic Acids on Post-Harvest Longevity of Chrysantemum Cut Flowers Budiarto, Kurniawan
PLANTA TROPIKA: Jurnal Agrosains (Journal of Agro Science) Vol 7, No 1 (2019)
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/pt.2019.091.33-40

Abstract

The longer vase life of chrysanthemum cut flower is one of the preferable quality traits in marketing for growers, retailers and consumers.  Several compounds, like ascorbic acid, have been reported to be able to prolong the post-harvest quality and longevity of cut flowers. Thus, the purpose of the study was to assess the ascorbic acid effects in several concentrations (0, 100, 200, and 300 ppm) in extending the fresh life of two chrysanthemum cultivars, i.e. cv. Remix (spray) and Yellow Fiji (standard).  The results showed that the termination of flower freshness was visually characterized by wilting of leaves and florets and the change in floret color (paler).  The supplementation of ascorbic acid solution at the concentrations of 200 and 300 ppm prevented and lengthened leaves and florets turgidity and postponed the wilting up to 2 – 3 days compared to control.  At the same concentrations, the solution also slowed down the degradation rates of chlorophyll content on leaves during vase life periods.
Characteristics of Dried Cocoa Beans (Theobroma cacao L.) Color Using Response Surface Methodology Hartuti, Sri; Bintoro, Nursigit; Karyadi, Joko Nugroho Wahyu; Pranoto, Yudi
PLANTA TROPIKA: Jurnal Agrosains (Journal of Agro Science) Vol 7, No 1 (2019)
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/pt.2019.097.82-92

Abstract

The research aimed to study the effects of storage time of cacao fruit before fermentation, aeration rate and temperature of fermenter during fermentation on the color value of dry cocoa  beans, including the value of L *, a *, b *, chroma, hue, and RGB, and their relationship using response surface methodology.. The results showed that storage time of cacao fruits before fermentation, aeration rate and temperature of the fermenter had an influence on the color values of L *, a *, b *, chroma, hue, and RGB of dried cocoa beans produced. The highest brightness prediction value of chroma color was ± 26 obtained in the treatment of the storage time of 9-day, aeration rate of 0.4 liters/minute, and fermenter temperature of 50 ℃. Meanwhile, the highest hue prediction value was 51.8 obtained in the treatment of storage time of 9 days, aeration rate of 0.3 liters / minute, and fermenter temperature of 50 ℃. Furthermore, the RGB color of dried cocoa beans showed that the color range of R (red) and G (green) of cocoa beans after fermentation was higher when compared to cocoa beans without fermentation, while the value of color B (blue) had a different tendency showing  that dried fermented cocoa beans had a lower blue range compared to unfermented cocoa beans.
Formulation of Biscuit Using Yellow Pumpkin Flour and The Addition of Coconut Flour as an Alternative for Complementary Feeding Miranti, Mauren Gita; Kristiastuti, Dwi; Kusumasari, Endah Dwi
PLANTA TROPIKA: Jurnal Agrosains (Journal of Agro Science) Vol 7, No 1 (2019)
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/pt.2019.092.41-47

Abstract

Complementary food should be added to the diet of the babies in addition to breast milk from 6 months onward and the food should be sufficient for the baby’s nutrition needs. Complementary feeding using baby biscuit made of yellow pumpkin flour and the addition of coconut flour is an effort to improve nutrition through local food diversification approach. The purpose of this study was to determine the best biscuit formulation and to test the physicochemical properties of the selected formula. This research used completely randomized experimental design consisting of four formulae of yellow pumpkin flour, i.e. 10%, 15%, 20% and 25%. The results of organoleptic tests showed that the best formula of the biscuit as complementary food is 25% yellow pumpkin flour and 12% of coconut flour. Consumption of two servings of biscuits can meet the nutritional adequacy of the babies except calcium. The biscuits can be kept for 92 days 8 hours under open conditions. In addition, the biscuits have good physical properties in terms of water absorption and hardness.
Indol Acetic Acid Production of Indigenous Plant Growth Promotion Rhizobacteria from Paddy Soil Purwanto, Purwanto; Agustono, Tridjoko; Widjonarko, Bambang Rudianto; Widiatmoko, Teguh
PLANTA TROPIKA: Jurnal Agrosains (Journal of Agro Science) Vol 7, No 1 (2019)
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/pt.2019.087.1-7

Abstract

The aim of this research was to examine the diversity of indigenous plant growth promoting rhizobacteria from paddy soil and to obtain a superior isolate that can support the growth and vigor of rice plants. This research was conducted in the Laboratory of Agronomy and Horticulture, Faculty of Agriculture, Jenderal Soedirman University from July to September 2017. The bacteria were isolated from paddy soil rhizosphere originated from rice production centers of Banyumas Regency i.e. Kebasen, Rawalo, Patikraja, Jatilawang, and Karangwangkal. Results showed that indigenous PGPR from paddy soil were able to produce Indol Acetic Acid (IAA) in the range 0.05-5.40 ppm, but did not have the ability to solubilize phosphate. Plant Growth Promoting Rhizobacteria (PGPR) inoculation in rice seedlings was able to increase seed vigor, plant height, root length, and seed germination. Based on morphological and biochemical characters, PGPR isolates were identified as Bacillus sp., Pseudomonas sp., Streptococcus sp., and Staphylococcus sp.

Page 12 of 43 | Total Record : 427

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