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Merakati Handajaningsih
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Akta Agrosia
Published by Universitas Bengkulu
ISSN : 14103354     EISSN : 26157136     DOI : https://doi.org/10.31186/aa
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Akta Agrosia is dedicated to researchers or academics who intent on publishing research, scientific thinking, or other scientific ideas. The articles published in the Akta Agrosia are the author’s original works covering on Crop Production, Crop Physiology, Pest and Disease, Soil Science, Agronomy, Plant Genetics, Plant Breeding, Plant Biotechnology. Akta Agrosia is published by the Department of Crop Production, Faculty of Agriculture, University of Bengkulu, biennially in June and December. ISSN:1410-3354 (printed media) and eISSN: 2615-7136 (online media).
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Agronomi dan Ilmu Tanaman
Articles 7 Documents
 1 
Search results for , issue "Vol 22 No 2 (2019)" : 7 Documents clear
Effect Branch Pruning To Establishment On Shoot Growth and Flower Stimulation On Guava Nafisah, Dio; Supanjani, Supanjani; Suprijono, Eko
Akta Agrosia Vol 22 No 2 (2019)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

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GuavaCrystalsarefromTaiwan,released byministryofAgricultureDecreeNo.540/Kpts/SR.120/9/2007.GuavaCrystalvarietiesare very prospective forcommercial developmentbecauseitcanproduce   throughtheyearandhasahighvitaminCcontent. Increasingpublicawarenessoftheimportanceofconsumingfreshfruitforhealthincrease the market demandforfreshfruit.Butthe highdemandforfreshguavafruitisnotsupported bytheproduction offreshfruiteveryyear.Continueddecliningguavaproductionrequires theimprovementofcultivationtechniquessothat   thequalityandquantityofguavafruit increases. ThisneedstoImprove ofcultivationtechniquesformeetthe needsoffreshguava. One ofsimplestcultivationtechniquestoimprovethe yieldofCrystalguavaispruning. This research intendtodetermine the effectofcroplengthonthe growthoflateralshootsandthe flowering of Crystal guava.ThisresearchwasconductedinDecember2016untilMarch2017at guavaplantation locatedinBentiringSub-ProvinceofBengkuluProvince.ResearchusedRAKLwithone singlefactor.The factorislengthofpruning,whichcomprisedoffourlevels10cm,20cm,30 cm,40cmandcontrol.The resultsofthisstudyindicatedthatthe numberofshootsmost grownonbrancheswith 40cmlongtrimmingof 2.87shoots.Mostflowersaregeneratedon brancheswithcuttinglengthsof30cm,40cm andnottrimmed.Butbrancheswith30cm long cutsexperiencedthe mostnumberoffallenfruitswitha95% percentage ofunshelled branches.Themostfruit isproducedonbranchesthatarenotprunedthatisasmuchas8.7 will fruit.Keyword:Guava Crystals, Long Prune, Lateral Shoots, Flowering
Bio-fortified Compost as A Substitute for Chemical N Fertilizer for Growth, N Accumulation, and Yield of Sweet Corn Marwanto, Marwanto; Wati, Shinta Puspita; Romeida, Atra; Handajaningsih, Merakati; Adiprasetyo, Teguh; Hidayat, Hidayat; Purnomo, Bambang; Murcitro, Bambang Gonggo; Siswanto, Usman
Akta Agrosia Vol 22 No 2 (2019)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

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ABSTRACTFinding the appropriate method of fertilizer application to simultaneously enhance farm productivity and ensure ecosystem sustainability has been receiving a lot of attention. A field experiment was carried in the Research Plot Agriculture Faculty Bengkulu University Campus Indonesia in 2017. The purpose of this study was (1) to assess the significant effects of inorganic N fertilizer (IF) substitution with bio-fortified compost (BC) under equal N conditions on growth, N accumulation, and yield of sweet corn, and (2) to determine the appropriate level to which inorganic N fertilizer could be reduced and equivalently replaced by bio-fortified compost to promote sweet corn growth and yield. The treatments consisted of six different proportions of inorganic N fertilizer (IF) substitution with bio-fortified compost (BC). Each treatment was designed on the basis of equal amount of total N input from a combination of both fertilizers (138 kg N ha-1).  They were arranged in a randomized block design with 3 replications. They included (1) 100% IF plus 0% BC, (2) 75% IF plus 25% BC, (3) 50% IF plus 50% BC, (4) 25% IF plus 75%, (5) 0% IF plus 100% BC, and (6) no IF and no BC. The results showed that the increasing proportion of IF replaced by BC resulted in an increase for all variables (except for plant height) but they decreased when 100% IF substitution with 100% BC was applied. Among the partial substitution treatments, 50% IF plus 50% BC consistently produced the best growth, N accumulation, and yield increase. Treatments of 50% IF plus 50% BC and 25% IF plus 75% BC produced the highest green cob weight with husk per plot (10.74 – 10.84 kg plot-1), which was 16% to 19% higher than treatment of 100% IF plus % BC. The three partial substitution treatments produced crop yield components as good as treatment of 100% IF plus 0% BC. Treatment of 0% IF plus 100% BC reduced plant growth, N accumulation, and crop yield and its components. The appropriate level to which IF could be reduced and equivalently replaced by BC was at the range of 25% to 75%. Hence, a suitable replacement of inorganic N fertilizer with bio-fortified compost is considered a reasoned way to simultaneously increase crop yield and reduce environmental degradation.Keywords: organic fertilizer, chemical fertilizer, bio-fortification, chemical fertilizer substitution, bio-fortified compost
Induction and Growth of Endosperm Cali of Rimau Gerga Lebong (RGL) Citrus on Several Media Compositions Sari, Rossi Anandayu; Herawati, Reny; Herison, Catur
Akta Agrosia Vol 22 No 2 (2019)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

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Rimau Gerga Lebong (RGL) variety is one of the main orange fruit commodities in Lebong Regency of Bengkulu Province, which has a competitive advantage and has good market potential. However, high number of seed characteristic makes this orange fruit becomes less popular.  Triploid genotype formation through endosperm culture in vitro is an alternative solution to develop seedless orange fruit.  The objective of this study was to determine the best composition medium for callus induction of endosperm of RGL orange seeds as the foremost step of in vitro triploid plant development. The research was conducted from August  2017  until  December  2018 at the Plant  Tissue Culture Laboratory, Department of Agronomy, Faculty of Agriculture, University of Bengkulu.  The  experiment  was  arranged  in  a  completely randomized design, with eight treatment combinations i.e. G1 (MT + 5 ppm BAP + 2 ppm 2,4-D), G2 (MT + 5 ppm BAP + 2 ppm 2,4-D + 500 ppm CH), G3 (MT + 5 ppm BAP + 2 ppm 2,4-D + 500 ppm + 0.5 ppm Kinetin), G4 (MT + 5 ppm BAP + 2 ppm 2,4-D + 500 ppm CH + 0.5 ppm to 500 ppm Kinetin + ME) , G5 (MS + 5 ppm BAP + 2 ppm 2,4-D), G6 (MS + 5 ppm BAP + 2 ppm 2,4-D + 500 ppm CH), G7 (MS + 5 ppm BAP + 2 ppm 2,4- D + 500 ppm CH + 0.5 ppm Kinetin), G8 (MS + 5 ppm BAP + 2 ppm 2,4-D + 500 ppm CH + 0.5 ppm to 500 ppm Kinetin + ME), with three replications. The experimental unit was five culture bottles containing three explants per bottle.  Observations were conducted on days to callus formation, rate of callus formation, callus weight, callus diameter, callus color and texture.  The results showed that media of MS + 5 ppm BAP + 2 ppm 2,4-D + 500 ppm CH was the best media for callus induction, and MT + 5 ppm BAP + 2 ppm 2,4-D + 500 ppm CH was the best media for callus development.Keyword: RGL citrus, calli, endosperm, kinetin, BAP
The Growth and Yield of Sweet Corn under Minimum Tillage Technology by Using Various Doses of Herbicide Mixtures of Glyphosate and 2,4-D Simanuhuruk, Bilman Wilman; Simarmata, Marulak; Aprianto, Ayyi
Akta Agrosia Vol 22 No 2 (2019)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

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Glyphosate is a widely used herbicide for minimum tillage technology because it effectively kills broadleaf and grass weeds. Mixing glyphosate with other herbicide that has a different mechanism, such as 2,4-D may increase control efficacy and prevent the evolved of resistant weeds.  Research was conducted to obtain the effective dose of glyphosate and 2,4-D mixtures and to evaluate the effect of the herbicide mixtures on the growth rate and yield of sweet corn. Depression on summed dominance ratios (SDR) and increased number of dominant weeds were observed after the application of glyphosate and 2,4-d mixtures. The interaction of the herbicide mixtures was observed optimum at the doses of glyphosate and 2,4-D of 1.94 and 1.5 L ha-1, respectively, with maximum of net assimilation rates (NAR) at 4-6 weeks after planting of 0.0003617 g cm-2 days-1.  Plant growth rates (PGR) and NAR were observed maximum by a single treatment of glyphosate at a dose of 1.5 L ha-1 which were 2.23614 and 2.23607813 g cm-2 days-1, respectively.  Yield of sweet corn observed as fresh-weight of cobs was found maximum of 129.41 g with a single treatment of glyphosate at 2,018 L ha-1.
Effect of Tithonia Compost (Tithonia diversifolia) and Phosphorus On The Growth and Yield of Peanuts Hutabarat, Rudi Saputra; Turmudi, Edhi; Setyowati, Nanik
Akta Agrosia Vol 22 No 2 (2019)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

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ABSTRACT This study aims to determine the effect of phosphorus dosage and tithonia compost on the growth and of peanut.The research had been conducted fromNovember 2017 to March 2018atBentiring Permai Village, Muara Bangkahulu Sub-District, Bengkulu City, Indonesiaat ± 10 m above sea level using Completely Randomized Block Design, two factors. The experiment was replicated three times. The first factor was tithonia compost with 2 treatment levels namely 0 ton ha-1 (control)and 20 ton ha-1. The second factor was dosage of phosphorus(SP-36)with 4 treatment levels, 25, 50, 75 and 100 kg ha-1.The results showed no interaction between compost and phosphorus dosage treatment  on the growth and yield of peanut crops. Tithonia compost at 20 ton ha-1 increase the growth and yield of peanut crop. Application of tithonia compost paitanat 20 ton ha-1 resulted in higher increase plant height, crop dry weight, pod weightand yield of peanut53%, 58%, 67% and 71% respectively, compared to that of control plants (not compost). Phosphorus dosage had no significant effect on the growth and yield of peanut.Keywords: Peanut, Tithonia compost, Phosphorus
Growth Response and Yield of Pakcoy (Brassica rapa L.) on Various Concentrations Liquid Organic Fertilizer of Jiringa Hulls [Phithecellobium jiringa (Jack) Prain Ex King] Hardiansyah, Peri; Nurjanah, Uswatun; Widodo, Widodo
Akta Agrosia Vol 22 No 2 (2019)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

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ABSTRACT Pakcoy (Brassica rapa L.) is a type of vegetable crop and one of the short-lived species needed by the body because it contains good nutrition. In order to meet the needs of pakcoy, it must also be balanced with the production level. One of the efforts to increase the production of pakcoy is the nutrient application of liquid organic fertilizer (LOF) from jiringa hulls. LOF can be absorbed by plants quickly rather than solid organic fertilizers and it does not damage soil structures such as synthetic chemical fertilizers. This study aimed to determine the optimum concentration of LOF on growth and production of pakcoy. The research took place at the Green House Laboratory of Agronomy, Faculty of Agriculture, University of Bengkulu. This research used Completely Randomized Design (CRD) with one treatment factor and repeated 5 times, each treatment unit included 3 potted plants. Treatment of LOF concentration, consisted of 5 levels: T0: LOF 0% (Control), T1: LOF 25%, T2: LOF 50%, T3: LOF 75%, T4: LOF 100%. The concentration of L0F 100% produce the best growth and production of pakcoy and has longest canopy (22,18 cm), highest number of leaf (15,86 strands), widest leaf width (34,26 cm2), highest fresh canopy weight (68,85 gram), highest total dry weight (6.92 grams), highest greenish leaves (48.48), and highest dried root weight (1.72 grams). Keywords: LOF, Jiringa Hulls, Pakcoy, Concentration
Population Characteristic and Genetic Relationship on 25 Bengkulu Heirloom Rice Based on Morpgological Traits Rustikawati, Rustikawati; Simarmata, Marulak; Pujiwati, Hesti; Herison, Catur
Akta Agrosia Vol 22 No 2 (2019)
Publisher : Badan Penerbitan Fakultas Pertanian (BPFP), Fakultas Pertanian, Universitas Bengkkulu

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Bengkulu Province has many local rice germplasms that have adapted to specific areas. The germplasm has certain character advantages so that it is maintained by farmers. The characteristics of each germplasm need to be identified in order to improve the properties of the existing germplasm. This study aimed to determine the performance, to estimate the value of genetic parameters, and to determine the genetic relationship of local rice genotypes collected from four districts in Bengkulu Province. The results showed that the ‘Kuning Sulaowangi’ genotype was the earliest in maturity had the highest number of tillers amongst genotypes. Genotypes which have significantly the highest average component yields were ‘Kunig Air Dingin’ and ‘Impera’.  Traits that have a high heritability estimated value were weight of 100 grains (91.046%) and grain weight per panicle (80.252%). The weight of 100 grains also has the highest genetic variability value. Thus increasing local rice production is possible. Based on the results of the analysis with the similarity coefficient of 55%, the local rice genotypes could be grouped into two groups.  Group I consisted of 9 genotypes namely ‘Kuning Pendek’, ‘Humbur’, ‘Cantik’, ‘Pandak Kelabu’, ‘Cisadane Putih’, ‘Kuning Sulaowangi’, ‘China Abang’, ‘China Putih’ and ‘Impera’. Other genotypes were in Group II.  Trait improvement can be done through hybridization between individuals of different groups. To develope early in maturity and high-yielding varieties can be done through hybridization of the ‘Kunig Sulaowangi’ and ‘Kunig Air Dingin’

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