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Published by Universitas Gadjah Mada

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Core Subject : Agriculture,

Agriculture, Biological Sciences & Forestry

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Articles 7 Documents

Search results for , issue "Vol 4, No 3 (2019): December" : 7 Documents clear

Root Morphology and Growth Response of Oil Palm (Elaeis guineensis Jacq) Hybrid to Al Toxicity at Nursery Tri Utami; Eka Tarwaca Susila Putra; Tohari Tohari
Jurnal Ilmu Pertanian Vol 4, No 3 (2019): December
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

The purpose of this study was to determine the response of eight oil palm hybrids through root morphological changes and growth to aluminum (Al) toxicity. The research was conducted in Sleman, Yogyakarta in June 2014 - June 2015. The study was prepared in a Factorial Randomized Block Design, with three replications as block. The first factor was was addition of aluminum in two rates (0 ppm and 300 ppm). The second factor eight oil palm hybrids (Yangambi, Avros, Langkat, PPKS 239, Simalungun, PPKS 718, PPKS 540 and Dumpy). The research was conducted at nursery stage. Observed variables include total root length, total root area, root volume, root diameter, aluminum uptake in root, fractal dimension, as well as fresh and dry root and shoot weight. The data obtained were analyzed by variant (ANOVA) at 5% level, followed by Duncan Multiple Range Test (DMRT) to find out if there was any real difference between the treatments. Aluminum at 300 ppm can change the morphological character of root, inhibiting root growth and biomass. All the hybrids give the same respon on root morphological and growth variables.

The Effects of Urea Fertilizing Techniques on Growth and Yield of Corn (Zea mays) in Vertisol Playen, Gunungkidul Heny Alpandari; Eka Tarwaca Susila Putra; Cahyo Wulandari
Jurnal Ilmu Pertanian Vol 4, No 3 (2019): December
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Corn production can be increased by proper urea fertilizers. Fertilization techniques commonly used by farmers are broadcast or buried into soil. But in both of these techniques can make to lose urea faster, because nature of urea is easily changed to ammonium (NH4+), then changed to ammonia (NH3) which leads to volatilization or leaching. This study aims to compare urea fertilization techniques commonly used by farmers and their effects on the growth and yield of corn in Vertisol on rainy season. The research method used was a single factor in randomized complete block design (RCBD) with four blocks as replications. The treatments were without urea (N1), buried urea into soil (N2), and broadcast of urea (N3), with a urea dose of 348 kg/ha obtained from soil sampling analysis. The observation of parameters (1) Climatic condition, (2) physical and chemical characters of soil, (3) Plant height, (4) Effect N fertilization on root and shoot, (5) Chlorophyll content and nitrate reductase activity, (6) observations of harvested. The data were analyzed using Analysis of Variance (ANOVA) at 5% levels, and continued Duncan Multiple Range Test (DMRT) at test level of 5%. The results showed that fertilization affecteds all parameters. Buried into soil (N2) and broadcast (N3) technique was significantly different only in leaf N content that is 3,31% (N2), 2,16% (N3) and also in higher plant, but not significantly different in other variables. Based on this research, farmers still use broadcast techniques because they are more efficient in terms of time and energy.

Characteristics of Soils Developing from Gabbro, Phyllite and Chert Parent Rock in Karangsambung District Ratna Taher; Makruf Nurudin; Eko Hanudin
Jurnal Ilmu Pertanian Vol 4, No 3 (2019): December
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Understanding the nature of the soil is very important to know the potential and the proper management of the soil. This study aimed to determine the differences in morphological, physical, and chemical properties of the soils developing from gabbro, phylitte and chert parent materials. The soil profile was made to represent each parent rock of gabbro, phyllite and chert located on the upper and middle slopes with pine-dominated vegetation and mixed gardens. Observation in the field is a professional description to observe soil morphology. Soil samples were taken at each horizon to analyze soil physical properties (bulk density, particle density, and texture), soil chemical properties (pH, exchanged cations, cation exchange capacity, available P, organic C, and total N). Texture analysis results showed that clay content of the soil developing from parent rock of Gabro 1 is the highest, followed by the soil clay content from Chert 1, Phyllite 1, Chert 2, Phyllite 2, and Gabbro 2, respectively. The order of soil acidity level (pH) is Gabbro 2 > Gabbro 1> Chert 1 ~ Chert 2 > Phyllite 1 ~ Phyllite 2. Meanwhile, the order of the cation exchange capacity is Gabbro 1> Gabbro 2> Phyllite 1> Chert 1> Phyllite 2> Chert 2, and the order of the base saturation is Chert 2> Gabbro 2> Chert 1> Phyllite 2 > Phyllite1> Gabbro 1.

Tolerance of T2 Generation ‘Kitaake’ Rice (Oryza sativa L.) CRISPR/Cas9-OsGA20ox-2 Mutant Strains to Drought Condition Husni Mubarok; Panjisakti Basunanda; Tri Joko Santoso
Jurnal Ilmu Pertanian Vol 4, No 3 (2019): December
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Rice (Oryza sativa L.) is important staple crop in Indonesia. Food demand that continues to rise while inadequate land could be managed by assembling superior cultivar using CRISPR-Cas9 system method. Editing the genome by mutating the GA20ox-2 gene could improve both crop yield and ability to thrive in marginal land (drought). This experiment aims to obtain non-transgenic mutant plants (non Cas9 and hpt genes), gain information on GA20ox-2 gene expression levels, and study the tolerance levels of the CRISPR /Cas9-OsGA20ox-2 mutant lines 'Kitaake' T2 generation against drought conditions. Planting material using a mutant gene GA20ox 2 ‘Kitaake’ (K23.1, K15, K29.1, K19.1) and wild-type comparison. From 20 plants, respectively the K23.1, K15, K29.1, and K19.1 lines have 50%, 50%, 0%, and 45% of non-transgenic plants. DNA mutations in the form of deletion 44 bases (K23.1, K29.1, K19.1) and insertion of two bases (K15) are transcribed into RNA. The transcription results in a number of lower amino acids compare to its wild type (389 amino acids). The lines K23.1, K29.1, K19.1 have 373 amino acids and the K15 line has 300 amino acids (frameshift). Differences in the number of amino acids result in different phenotypic expressions. K15 mutant line has lower plant height and leaf length than the other mutant lines and wild type. The decrease does not decrease the potential of the crop. Mutations in the K15 line did not indicate better tolerant response to drought stress than other mutant lines and wild type in both vegetative and generative phase.

Effects of Different Types and Dosage of Green Mulch on Yield and Quality of Aloe vera L. on Coastal Sandy Soil Maria Theresia Darini
Jurnal Ilmu Pertanian Vol 4, No 3 (2019): December
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

A complete content of chemical substance from Aloe vera leaf makes this plant has many functions such as the ingredient of functional food for health, cosmetics, and herbal medicines. This research was aimed to determine the yield and quality of Aloe vera L. on various types and rates of green mulch in coastal sandy soil. The research was conducted in coastal sandy soil of Poncosari Srandakan, Bantul, Yogyakarta and done in a Randomized Complete Block Design (RCBD) of two factors with three replications. The first factor was four types of green mulch (shrimp evergreen, cashew, acasia and gliricidia). The second factor was various rate of green mulch consisted of three levels rates of leave mulch (5.0, 10.0, and 15.0 tons ha-1). Soil without mulching was used as a control treatment. The variables observed were yield at the first harvest time and leaf content quality which includes water, protein, fat, carbohydrate, ash, fiber, and mineral (Ca, Fe and Zn). The results showed that there was interaction between types and rates of leave mulch in all variables observed. Gliricidia leaf mulch gave the best effect with optimum rate about of 10 ton ha-1. The effectiveness of green mulch abilities on improving the observed variables from higher order to low was gliricidia, acasia, cashew and shrimp-type evergreen with the rate range between 10 up to 15 tons ha-1.

The Growth, Production, and Quality of Shallot at Inland Quartz Sands (Quarzipsamments) in the off Season Anang Firmansyah; Andy Bhermana
Jurnal Ilmu Pertanian Vol 4, No 3 (2019): December
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

The development of shallot cultivation at back quartz sand during rainy or off season can be considered as new innovation. The objectives of this study is to obtain shallot varieties that are adaptive in terms of the growth, production, and quality parameters. The research was conducted during off season in Palangkaraya. The experimental design used in this research is randomized block design (RBD) 4x3 with 4 treatments of varieties (Maja Cipanas, Tajuk, Bauji and Bima Brebes), and 3 replication for each treatment. The results showed that soil bulk density increased with the deepening of the soil, however soil water content decreased. Based on growth parameter, Tajuk showed the best results and significantly different comparing to Bima Brebes, with plant height consecutively 46.88 cm and 39.52 cm, number of leaves 70.7 and 35.27 and number of shoot 13.43 and 6.60. For production parameter, the weight of varieties of Maja Cipanas, Bauji dan Bima Brebes is 10 grams more than Tajuk with weight is 6,97 grams only. The produstion of Tajuk is low and not significantly different from Bima Brebes, with production is respectively 15.28 ton/ha and 13.31 ton/ha, while the varieties of Bauji showed the highest dry production of 22.4 ton/ha although it is not significantly different with Maja Cipanas that can produce 18.49 ton/ha. For quality parameter, the varieties of Bima Brebes showed the optimum results in terms of parameter of hardness of tubers and total dissolved solids (TDS) with the value of 4.9 kg /cm2 and 16,42 % respectively.

The Effects of Silica on Growth and Yield of Chrysanthemum Plants (Dendranthema Sp.) Cultivar Sheena and Snow White Sylvatera Ayu Puspitasari; Didik Indradewa
Jurnal Ilmu Pertanian Vol 4, No 3 (2019): December
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Silica is one of beneficial nutrient in plants. Silica functions to strengthen epidermal wall and vascular tissues so that it can affect the stems that are getting bigger and stronger. The present study was conducted to determine the effects of silica fertilizers on growth and yield of chrysanthemum plants in Sheena and Snow White varieties that have different anatomies. The present study used Split Plot Design. The main plot was the concentration of silica with 4 levels, i.e. 0 mg/l/m2, 31.1 mg/l/m2, 62.2 mg/l/m2, and 93.3 mg/l/m2. The subplots were two varieties, Sheena and Snow White. The present study revealed that Si fertilizers with 62.2 mg/L concentration could accelerate harvest age and the stem hardness in Snow White aged 45 days. The Snow White which has bark stem anatomy was more responsive to silica fertilizers than the Sheena with the woody stem anatomy. This research provides benefits for researchers, farmers and policy stakeholders to increased yield and quality for local and international market competition.

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