bluuebunny/crossref_metadata_2025_split huggingface dataset:
Morphological characteristic of Fusarium spp. in several highlands of North Sumatera
Authors: Minarni  , Hasanuddin  , Ginting J 
Published: June 2021

Abstract

Fusarium spp. is a genus of fungi that causes disease in many plants so that special attention, handling and control is needed for this pathogen. Morphological observations are needed to provide an overview of macroscopic and microscopic morphological variations that be used as basic information in the development of a Fusarium spp. control program. The research aims to determine the morphological characteristics of Fusarium spp. in several highlands of North Sumatra. The research was conducted at the Laboratory of Plant Diseases, Faculty of Agriculture, Universitas Sumatera Utara, Medan in September-December 2019. Fusarium spp. isolates obtained from several highlands of North Sumatra were rejuvenated on Potato Dextrose Agar (PDA) medium. All isolates were observed macroscopically and microscopically to determine colony morphology including macroconidium, microconidium and conidiophores. Microscopic morphological observations using a compound microscope. The results showed that Fusarium spp. obtained have almost the same morphology. Microscopic observation showed that there were differences in macroconidia morphology in Fusarium spp isolates found in Tanah Karo District with Simalungun and Dairi Districts.
The effect of the ratio of wheat flour with fermentation orange sweet potato flour and addition of baking powder on the quality of dried choux pastry
Authors: Rahmadani A , Lubis L M , Nainggolan R J 
Published: June 2021

Abstract
The research aims were to find out the nutritional value of wheat flour and fermented orange sweet potato flour and the addition of baking powder and to identify the best formulation of dried choux pastry making. The research was using completely randomized design with two factors. i.e., the ratio of wheat flour with fermented orange sweet potato flour (T): T1 = 50:50, T2 = 60:40, T3 = 70:30, T4 = 80:30. The second factors is baking powder (B): B1 = 1%, B2 = 2%, B3 = 3%. The ratio of wheat flour with fermented orange sweet potato flour had a highly significant effect on moisture content, cake volume specific, colour hedonic values, texture hedonic values, and texture score values. The addition of baking powder had a highly significant effect on moisture content, cake volume specific, texture hedonic values, and texture score values. The interaction of the ratio of wheat flour with fermented orange sweet potato flour and the addition of baking powder had a highly effect on cake volume specific. The best-dried choux pastry composition is treatment T4B3 which the ratio of wheat flour with fermented orange sweet potato of 80:20 and 3% baking powder addition.
The effect of sauerkraut liquid with sugarcane water and fermentation time on the quality of instant bekasam of mujair fish
Authors: Lubis N N , Suhaidi I , Yusraini E 
Published: June 2021

Abstract
The purpose of the study was to determine the effect of the addition of sauerkraut liquid with sugarcane water and fermentation time on the quality of instant bekasam of mujair fish. The research was using a factorial randomized design with addition of sauerkraut liquid with sugarcane water (P1=60%:40%, P2=70%:30%, P3=80%:20%, P4=90%:10%) and fermentation time (L1=12 hours, L2=24 hours, L3=36 hours). The addition of sauerkraut liquid with sugarcane water had a highly significant effect on moisture content, protein content, pH content, hedonic values of flavour and taste. Fermentation time had a highly significant effect on protein content, pH values, hedonic values of aroma and taste. The addition of sauerkraut liquid with sugarcane water of 80%:20% and fermentation time of 36 hours had the best quality of instant bekasam of mujair fish.
Taking essential oil by water distillation and antibacterial activity test of refined water from agarwood plant parts (Aquilaria malaccensis Lamk)
Authors: Nurminah M , Batubara R , Ismanelly T , Albert  
Published: June 2021

Abstract
Agarwood distilled water is a by-product produced during water distillation from wood containing resin in Aquilaria sp. Distilled water contains a small fraction of aromatic compounds obtained from plants during the distillation process which collects in distilled water. This research is expected to provide information about the potential of agarwood plant parts. The methods were raw material preparation, determination of water content, making distilled water, phytochemical screening and antibacterial activity test. The results were water content (average value 1.98-5.29 %) has met the BPOM RI standards, we met glycosides in leaf, trunk, skinned stems, bark. Parts of agarwood has antibacterial activity against Streptococcus mutants bacteria.
Edible coating made of taro starch and red dragon fruit peel extract
Authors: Sipayung K , Sinaga H , Suryanto D 
Published: June 2021

Abstract
Edible coating is a technique for food preservation that improves product quality. This research was conducted to introduce innovative edible coating packaging that is environmentally friendly and safe in food products with the aim to extend shelf life and the ability to prevent microbial growth. Edible coating was made from taro starch, CMC, glycerine, stearic acid, and dragon fruit peel extract, then pH analysis and antibacterial activity test against Staphylococcus aureus were carried out. It is known that the characteristic of the edible coating produce with the best pH value and antibacterial activity against Staphylococcus aureus were of obtained in 1.0 % concentration namely 5.197 and 1.685 mm, respectively. The average inhibition zone formed by dragon fruit peel extract has a weak inhibitory power against Staphylococcus aureus bacteria.
Effect of mackerel (Rastrelliger) arsik soup on the LDL levels of hypercholesterolemic rats
Authors: Mendrofa A M S , Julianti E , Nainggolan R J 
Published: June 2021

Abstract
Fish arsik soup is a popular traditional food in North Sumatera especially in Batak ethnic. This research aimed to evaluate the effects of different dose of mackerel fish arsik soup on body weight and LDL blood level in rats that were given a cholesterol rich feed namely quail egg yolk. Research was performed by using a Randomized Group Design. Forty male rats were grouped into 5 groups. The first group (K1) was the negative control group which was given distilled water and basal diet. The second, third, and fourth groups were given fish arsik soup with the dose of 1 ml/200 g body weight (bw)/day (K2), 2 ml/200 g bw/day (K3), and 3 ml/200 g bw/day (K4), and the last group was positive control group which was given gemfibrozil (K5). The result shows that rats fed quail egg yolk had a state of body weight gain and hypercholesterolemic. Administration of mackerel fish arsik soup to hypercholesterolemic rats with various dose had significantly (p<0.05) lower LDL level of rat blood compared to negative and positive control groups. The administration of mackerel fish arsik soup 1 ml/200 g bw/day resulted in the highest reduction in LDL levels in the rat’s blood.
Seagrass distribution in the east coast of Bintan
Authors: Khairunnisa  , Setyobudiandi I , Boer M 
Published: June 2021

Abstract
There is a lot of seagrass species in Bintan. This study aimed to assess the seagrass distribution and density in the east coast of Bintan Island. The sampling was conducted from January to March 2017 in three observation stations which were Berakit, Malang Rapat, and Teluk Bakau. The observation and assessment of seagrass distribution and density was conducted using line transect method and 0.5 m x 0.5 m quadrats along the transect. In total, 9 species were found during this study namely Syringodium isoetifolium, Enhalus acoroides, Thalassia hemprichii, Cymodocea rotundata, Halophila uninvervis, Halodule pinifolia, Halophila ovalis, Thalassodendron cilliatum, and Cymodocea serrulata. Highest seagrass composition is found in sampling point 3 and E. acoroides was found in all sampling point location. This could comparison study to the present status and be basic data for seagrass management in Bintan Island.
Inhibition effectivity of Halimeda macroloba seaweed extract against fish indigenous bacteria for safety fisheries product
Authors: Dewinta A F , Wahyudi Y A , Pratama R Y , Susetya I E , Siregar R F , Manurung V R 
Published: June 2021

Abstract
Concerns about the potential for residual antibiotics can cause adverse health effects for consumers. The use of inappropriate antibiotics is feared to lead to antimicrobial resistance by pathogens. New sources of antibacterial can be obtained from bioactive compounds from seaweed, one of which is a H. macroloba type. The research objective was to determine the effectiveness of H. macroloba seaweed extract inhibition against indigenous bacteria in fish. H. macroloba samples taken from the waters of Pane Island. The extraction process was carried out by maceration method with methanol p.a solvent. The secondary metabolites were obtained with phytochemical test. Inhibition test with the Kirby-Bauer agar diffusion method through experimental by adding DMSO. H. macroloba have secondary metabolite compounds, there are alkaloids and flavonoids which a function as an inhibitory force for bacteria. Different treatment of H. macroloba extract resulted in a significant effect on Vibrio parahemolitycus with an inhibitory value of 10.73 mm. Meanwhile, different treatment on Aeromonas hydrophyla and Aeromonas salmonicida was stated to have no significant effect in increasing the inhibition zone diameter. However, it was directly proportional to the increasing effectiveness of the inhibition zone diameter, the most effective treatment was at a concentration of 100%.
The effectiveness of contact fungicides mancozeb in controlling potato leaf blight disease (Phytophthora infestans (Mont) de Barry) in Karo District in the wet month and in the laboratory
Authors: Sari A L , Hasanuddin  , Lubis L 
Published: June 2021

Abstract
The increase of potato harvest area in North Sumatra was not accompanied by the production is caused by Phytophthora infestans, especially in the wet months. The most control method used in farming is using synthetic fungicides with mancozeb ingredients. To achieve efficiency, the effectiveness of management, and safety products, accuracy is needed in the use of concentration and application intervals. This research was conducted from December 2018 to December 2019 at the Laboratory of Plant Diseases, Faculty of Agriculture, Universitas Sumatera Utara and in an experimental field in Berastagi, Karo Regency. Laboratory experiment used a completely randomized design with fungicides concentrations 160 ppm, 240 ppm, 320 ppm and without fungicides. The field experiment was arranged in a Factorial Randomized Block Design with 1st factor was: concentrations of contact fungicide mancozeb 2 gr fungicide/L, 3 gr fungicide/L, 4 gr fungicide/L and without fungicides. The 2nd factor was: fungicide application interval 4 days, 8 days and 12 days respectively. The fungicide concentration could inhibit the growth of P. infestans in vitro. Consequently, the fungicides concentration and application intervals as well as their interactions were not effective in decreasing the severity of potato leaf blight in the field experiment during the wet months.
The application of Hydrogel (Super Absorbent Polymer) and chicken manure fertilizer to increase pH, N-total, C-organic and soil water content in Entisol
Authors: Sarifuddin  , Rauf A , Dewantari Y 
Published: June 2021

Abstract
Entisol is one of the soils which not only poor in nutrients, especially Nitrogen and organic carbon, but also has an acidic pH and low water-holding power due to the sandy soil fraction hence additional soil conditioners are needed to improve the soil, such as hydrogel and chicken manure as organic material. This research aimed to assess the ability of hydrogel and chicken manure to increase pH, N-nutrient, C-Organic and moisture content in Entisol soil. The research was conducted in a greenhouse using a randomized block design with 2 factors, factor I was the hydrogel consisting of H0 = 0 g/polybag, H1 = 100 g/polybag, H2 = 200 g/polybag, H3 = 300 g/polybag and factor II was chicken manure consisting of K0 = 0 g/polybag, K1 = 50 g/polybag, K2 = 100 g/polybag, and K3 = 150 g/polybag. The results showed that the hydrogel and chicken manure and its interaction were able to increase the pH, N-total, C-organic and soil water content of Entisol.
Response of edamame growth and production in the lowlands by spacing treatment and application of liquid organic fertilizers
Authors: Hasanah Y , Lahay R R , Pangestu W 
Published: June 2021

Abstract
Edamame soybeans have excellent prospects for development in the lowlands. In order to grow well, edamame soybeans need liquid organic fertilizer as a nutrient supply and proper spacing. The objective of the research was to evaluate the effect of spacing treatment and application of liquid organic fertilizer (LOF) on soybean edamame growth and production. A field research was conducted in Medan from September until December 2019, using a factorial randomized block design with two factors and three replications. The first factor is spacing treatment of edamame, namely 40cmx20cm; 30cm x 20 cm and 20cm x 20cm. The second factor is LOF application consisting of 40; 60 and 80 mL/L of water. Research result showed that spacing of 30cm x 20cm treatment increased the number of productive branches. LOF treatment of 40mL/L of water increased the dry weight of 100 seeds. The interaction between plant spacing and LOF application had no significant effect on all observed variables.
Growth and production of Cilembu sweet potatoes (Ipomoea batatas L.) varieties in the highlands with potassium fertilizer and pruning treatments
Authors: Hasanah Y , Rahmawati N , Nasution K H 
Published: June 2021

Abstract
The efforts to increase the productivity of sweet potatoes is applying of potassium and pruning treatments. The objective of the study was to evaluate the effect of potassium fertilizer and pruning treatments on the growth and production of Cilembu sweet potato varieties in the highlands (1.340 m above sea level). The study was conducted at “Balai Penelitian Tanaman Sayuran” (Vegetable Crops Research Institute), Tongkoh Village, Berastagi – Tanah Karo on September 2018 - March 2019, using a factorial randomized block design. The first factor was potassium fertilizer (0; 7; 14 and 21 g KCl/plant) and the second factor was pruning (without pruning; pruning till 3 tendrils; pruning till 2 tendrils and pruning till 1 tendril). The result of the research showed the treatment of potassium (7-21 g/plant) significantly increased the tuber size compared to without potassium fertilizer. The combination of 7 g KCl/plant and pruning till 2 tendrils treatments significantly increased the length of the main tendrils at 10-11 week after planting and tuber length per sample. While the combination of 14 g KCl/plant and pruning till 3 tendrils treatments produced the highest tuber weight per plot.
The health status of saga tree (Adenanthera pavonina) in campus area of Universitas Sumatera Utara (USU)
Authors: Susilowati A , Ahmad A G , Rangkuti A B , Harahap M M , Sujarwo  , Ginting I M 
Published: June 2021

Abstract
Saga (Adenanthera pavonina) is multipurpose tree species found in the Universitas Sumatera Utara (USU) campus. Along with broken branches and fallen trees on the USU campus, it is necessary to monitor the trees’ health. This study aimed to measure the saga trees’ health status at the USU campus. The research was conducted by the census method to 153 saga trees. The health monitoring was performed using Forest Health Monitoring (FHM) method. The results showed that the sixth damage type that occurred on saga trees are: cancer, decay further, open wounds, leaves decolourization, loss of dominant tip, and broken or dead branches. Based on its health status, four trees (2.61%) are in the very healthy category, 35 trees (22.88%) are in the healthy category, 88 trees (57.52%) are less healthy, and 26 trees (16.99%) are in the unhealthy category. The damage index value for saga trees at the USU campus is commonly on the moderate category, so maintenance activities are needed to improve tree health and avoid unwanted incidents.
Amount of applications biofertilizer and biological control agents (Beauveria bassiana Vuill) on growth and yield of red chili (Capsicum annuum L.)
Authors: Hapsoh I R , Dini  , Salbiah D , Saputra M 
Published: June 2021

Abstract
High chili production is inseparable from proper fertilization and control of pests and plant diseases. This is done because red chili is a plant that is quite susceptible to attack by pests and diseases, resulting in disruption of growth and decreased production of red chili. Efforts that can be made to overcome this problem are by applying biofertilizer and entomopathogenic fungi (Beauveria bassiana) as biological control agents. The application is expected to increase the production of red chili plants and reduce the use of inorganic fertilizers and chemical pesticides. The research objective was to determine the effect of amount of applications biofertilizer and biological control agents on red chili production. This study used a factorial completely randomized design consisting of two factors where the first factor was amount of applications biofertilizer and the second was amount applications of biological control agents. Each factor consists of four levels, namely zero time, one time, twice, and three times applications. The results showed that amount of applications three times of biofertilizer and biological control agents tended to give the best response to the yield of red chili.
Radio-sensitivity test of gamma irradiation of local chilli pepper seeds (Capsicum annum L.)
Authors: Tarigan R , Hanafiah D S , Sinurya M 
Published: June 2021

Abstract
Chilli pepper is a strategic horticultural commodity for its economic, nutritional, and medicinal values and is used as a spice in a variety of cuisines all over the world. Induced mutation by gamma ray’s irradiation has been used to increase chilli resistance and quality. The objective of this study was to determine the optimum dose of gamma irradiation in inducing resistance in putative mutation(M1) on chilli pepper seeds. The seeds induced were infected by Pepper Yellow Leaf Curl Virus (PYLCV) and were irradiated with 0, 25, 50, 100,150,200, 250, 300, 350, 400, 450, 500, 600, 700, 800, 900, and 1000Gy. The plants (M1) were observed for their seed germination, leaf length, leaf width, and plant height. The results indicated that the best LD50 irradiation was 288.269 Gy (y = 82.7847+ 0.0698x + 0.0002x2 + 2.0082x3). The results also revealed that plants irradiated with doses 150, 200, and 250 Gy were selected to be planted in the field.
The effect of biofertilizer, chicken manure and dolomite on chemical soil and the growth of soybean at potential acid sulphate soils
Authors: Lubis K S , Hanum H , Aulia G 
Published: June 2021

Abstract
The combination of Biotara bio fertilizer and dolomite is known to improve the potential acid sulphate soil fertility. This research has been carried out to examine the effect of Biotara as bio fertilizer, chicken manure, and dolomite on several soil chemical properties and soybean growth in potential acid sulphate soil from May 2018 to January 2019 at greenhouse of Agricultural Faculty, Universitas Sumatera Utara Medan. This research has been carried out using factorial randomized block design with 2 (two) factors and 3 (three) replications and analysed using ANOVA. The first factor is biofertilizer consist such as P0 (without biofertilizer), P1 (50 kg/Ha), P2 (50 kg/Ha with 1 ton/Ha of chicken manure). The second factor is the consist of dolomite, such as K0 (without dolomite), K1 (2 ton/Ha), and K2 (4 ton/Ha). The results showed that the combination of biofertilizer (50 kg/Ha) with chicken manure (1 ton/Ha) can increase pH, organic carbon, total-N, and available phosphate, height and dry weight of crop, N and P uptake of soybean. Interaction between biofertilizer (50 kg/Ha), chicken manure (1 ton/Ha) and dolomite (4 ton/Ha) showed the best yield on total-N and available phosphate, height, and dry weight, N and P uptake of soybean.
Study of some chemical properties of ultisol soil applied by biochar and compos from some biomasses and incubation time
Authors: Utami A , Hidayat B , Mukhlis  
Published: June 2021

Abstract
Biochar and compost applications are alternative in improving soil chemical properties, such as Ultisol soil and utilizing the current abundance of biomass waste. Biochar has long available properties and takes longer to decompose than compost. This study aims to compare the effect of biochar and compost for several months of incubation on soil chemical properties. This research was conducted with several pot from plastic cup and placed in a greenhouse using a non-factorial randomized block design with control, biochar and compost treatments taken from rice straw biomass, empty palm oil bunches, and cow dung, with 3 replications. The parameters measured were pH H2O, C-Organic, N-total, and available P. The results indicate that the provision of biochar and compost can increase the pH of H2O, C-Organic, N-total, and P available in Ultisol soil for 1,2 and 3 months of incubation. Biochar is better at increasing available pH, C-Organic, N-total, and P than compost with the best treatment found in Biochar from cow dung biomass and oil palm empty bunches. Meanwhile, the treatment of cow manure compost was better at increasing pH H2O during incubation time and nutrients in Ultisol soil, followed by compost of empty palm oil bunches and straw.
Morphophysiological characters of binahong (Anredera cordifolia (L.) Steenis) with application of natural growth regulators
Authors: Mawarni L , Hasanah Y , Rusmarilin H 
Published: June 2021

Abstract
The morphophysiological study of binahong is still limited. The objective of the research is to identify the morphophysiological characteristics of binahong plants through natural GR application. This study described the relationship of plant length, number of leaves, stomatal density, and the content of chlorophyll leaves of binahong due to the application of natural growth regulators from coconut water combined with red shallot extract, bamboo shoots, and banana weevils. The research used a nonfactorial randomized block design with 3 replications. The results obtained in general giving GR can reduce plant length and number of leaves. The highest stomatal density was obtained in the application of coconut water while the lowest as shown in the application of coconut water and bamboo shoots. Chlorophyll a and b, as well as the highest total chlorophyll, are found without growth regulators application and application of a mixture of coconut water, shallot, bamboo shoots and, banana weevils. Chlorophyll a and b and the lowest total chlorophyll are found in the application of coconut water and bamboo shoots.