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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 29 Documents
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Search results for , issue "Vol 7, No 1 (2019)" : 29 Documents clear
PLANTA TROPIKA: JURNAL AGROSAINS (JOURNAL OF AGRO SCIENCE) VOL. 7 NO. 1 Kurnia, Chandra
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

Abstract

Direction, Panel Height, and Tapping Frequency Affect The Daily Bark Consumption in Hevea Rubber Tapping Junaidi, Junaidi; Atminingsih, Atminingsih; Darojat, Muhammad Rizqi
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.2019.094.58-65

Abstract

Bark consumption is defined as the thickness of sliced bark per time unit. This research, aiming to identify the effects of direction, panel height, and tapping frequency on daily bark consumption, was carried out at Sungei Putih Research Center, North Sumatera and several estates in Lampung (Kedaton, Bergen, and Way Lima) from January to March 2018. The observations involved 15 tapping tasks consisting of GT 1, PB 260, and mixed clones. Bark samples were collected from 10 randomized trees in each task. Tapping direction was distinguished as downward tapping and upward tapping, while panel height was classified into 50 cm, 50 – 100 cm, and 100 – 130 cm in downward tapping and 130 – 150 cm, 150 – 170 cm, and 170 cm in upward tapping. Tapping frequency effect was investigated in a trial plot using frequency of once in three days (d3), once in four days (d4), once in five days (d5), once in six days (d6), and once in eight days (d8) on the basal panel (B0-2). Bark consumption was measured directly using a digital caliper. The observation result indicated that upward tapping had higher bark consumption than downward tapping. In downward tapping, the lower tapping position, the higher bark consumption would be, whilst in upward tapping, bark consumption increased along with the panel height. Low tapping frequency (d4, d5, d6, and d8) showed higher bark consumption per tapping than d3, yet they had lower cumulative bark consumption per year.
N Absorption in Nontidal Rice Fields Treated with Microalgae and Nitrogen Fertilizer Application Buyana, Nova Tri; Gofar, Nuni; Rohim, A. Madjid
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.2019.089.19-25

Abstract

Nutrient elements that are needed by plants during its growth and development is nitrogen. Nitrogen deficiency can cause plants to become necrosis so that plants are not able to photosynthesize well, thus result in lack of food needed by plants. Microalgae can provide nitrogen for rice crops due to its activity. The aim of this research was to know the effect of microalgae from nontidal swamp land to reduce the use of inorganic N fertilizer in paddy field. The study was conducted from January to April 2017, using factorial completely randomized design with two factors, namely isolate and dosage of nitrogen fertilizer. The first factor is the type of the isolate (I), consisting of cultures from the area of rice cultivation (I1), the culture originating from the area around the rice fields (I2) and the cultures of area without rice cultivation (I3) area. The second factor is the dose of nitrogen fertilizer (N) consisting of 0%, 50% and 100%. The results showed that the treatment of the isolate (I) or dosage of nitrogen fertilizer had a significant effect on the weight of 1000 filled grains and the weight of empty grains in the generative phase of rice plant. The interaction between both treatments had a significant effect on the generative (production) phase. The microalgae culture from area of rice cultivation (I1) can contribute nitrogen requirement of 16.23% - 48.71% with an abundance of 7.48 cells ml-1, with the requirement of rice plant nitrogen fertilizer of 45-135 kg ha-1.
Front Matter Planta Tropika: Jurnal Agrosains (Journal of Agro Science) Vol. 7 No. 1 Manager, Journal
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/planta tropika.v7i1.11287

Abstract

Back Matter Planta Tropika: Jurnal Agrosains (Journal of Agro Science) Vol. 7 No. 1 Manager, Journal
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.v7i1.11288

Abstract

Indol Acetic Acid Production of Indigenous Plant Growth Promotion Rhizobacteria from Paddy Soil Purwanto Purwanto; Tridjoko Agustono; Bambang Rudianto Widjonarko; Teguh Widiatmoko
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.
Physico-Chemical Properties of Volcanic Soils under Different Perennial Plants from Upland Area of Mt. Merapi, Indonesia Retno Kartikawati; Eko Hanudin; Benito Heru Purwanto
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.2019.098.93-102

Abstract

Vegetation recovery is essential in land restoration after the eruption of Mount Merapi in 2010. Vegetation is a source of organic material that produces root exudate containing organic acids. These acids accelerate the dissolution process of volcanic material so that it affects the soil characteristics. This study was conducted to analyze the effect of four types of perennial plants on soil chemical and physical characteristics. The soil samples were taken on the area planted with cinnamon, albizia, bamboo, and acacia, at depths of 0 – 10 cm, 10 – 20 cm, 20 – 30 cm, 30 – 40 cm, and 40 – 50cm. The soil chemical analysis carried out included pH H2O, pH KCl, pH NaF, C-organic, Humic acid and Fulvic acid, cation exchange capacity, Ca, Mg, K, Na, available P, base saturation, and particle size distribution. The results show that pH H2O, pH KCl, C-organic, humic acid and fulvic acid, CEC, K, Na, Ca, Mg, available P, base saturation, and particle size distribution were significantly affected by vegetation type. Meanwhile, the pH of NaF was not significantly influenced by vegetation type. Cinnamon is a plant that gives the strongest influence in the improvement of soil chemical-physical properties compared to the other three types of vegetation. Therefore cinnamon is quite prospective plant to be developed for post-eruption land reclamation.
The Resistance of Soybean Genotypes to The Pod Feeding Insects Krisnawati, Ayda; Adie, Mochammad Muchlish
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.2019.093.48-57

Abstract

One of the constraints impeding soybean production in the tropics is yield losses due to the damage by pod feeding insects. The research objective was to identify the resistance of soybean genotypes to the pod feeders. The existence of the pod feeding insects was evaluated on 24 soybean genotypes planted in Ngawi (Indonesia) in 2016. The experiment was arranged in a randomized block design with two environmental conditions. The first environmental condition was plants controlled by insecticide during plant growth, and the second condition was plants controlled by insecticide only up to 45 days after planting (dap). The pod feeding insects included pod sucking bug (Riptortus linearis), pod borer (Etiella zinckenella), and podworm (Helicoverpa sp.). The damage intensity of pod sucking bug at 45 dap of controlled environment reached 60.24%, meanwhile the damage intensity of pod borer and podworm were 46.08% and 3.85%, respectively. This indicates that the natural population of pod sucking bug is relatively high and dominant. Of 24 soybean genotypes tested, NSP-16-2-8 was consistently resistant on environments with and without insecticide application, whereas NSP-16-1-4 was consistently resistant to the pod borer attack. Those genotypes were potential to be used as source of genes for pod feeding insects’ resistance in the breeding program.
Tropical Vegetation and Land Cover Mapping Using LiDAR Nurcholis, Mohammad; Himawan, Iwan Qodar; Wijayanti, Syintianuri Intan; Darmaristianti, Ayu
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.2019.088.8-18

Abstract

LiDAR (Light Detection and Ranging) is a system of active remote sensing technology using a laser beam that has an invisible wave (Infrared) that can penetrate the leaf gap to produce topographic characteristics of the land surface. The research locations were in Tunas Baru Village Sekernan District, Muaro Jambi Regency, Jambi Province. The purpose of this study was to apply Airborne LiDAR technology along with interpretations in agriculture, especially land cover vegetation mapping in Jambi Province, which is a province that has a fairly extensive forest area. Speaking of that situation, a land cover map and classification are needed to find out which vegetation is dominant in the area. The data needed in this professional work class were DEM, DSM and orthophoto data to be processed into CHM (dataCrown Height Model) in order to facilitate digitization in determining density classes. At the same time, orthophoto was used to digitize the classification of vegetation types, which will produce output in the form of a map of land cover in Tunas Baru Village, Sekernan District, Muaro Jambi Regency, Jambi Province.
Effects of Plant Media And Fertilization on The Growth of Orchid Plant (dendrobium sylvanum rchb. F.) in Acclimatization Phase Sucipto Hariyanto; Ahmad Ridlwan Jamil; Hery Purnobasuki
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.

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