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Articles by Syariful Mubarok
Total Records ( 9 ) for Syariful Mubarok
  Syariful Mubarok , Erni Suminar and Nadia Nuraniya Kamaluddin
  Ethylene regulates many aspects of plant growth and development. During the post-harvest handling of ornamental plants, ethylene presence must be minimized to prevent quality decrease of post-harvest life, such as petal abscission and leaf senescence. To minimize the ethylene effect, several prevention strategies were developed, such as inhibition of ethylene biosynthesis and ethylene perception. This review described the inhibition of ethylene perception through chemical compounds application. Inhibition of ethylene perception is a more effective technique compared to ethylene biosynthesis in preventing ethylene effect. This was due to both endogenous and exogenous ethylene can be blocked. 1-Methylcyclopropene (MCP) is one of the common chemical compound used as ethylene inhibitor. Two formulations of 1-MCP had been developed in the recent years, gas-released powder (volatile 1-MCP) and water-soluble powder (sprayable 1-MCP). Despite having the same active ingredient, the two formulations had different affinity in ethylene effect prevention. The effectiveness of 1-MCP had been widely investigated on several ornamental plants such as Chrysanthemum, Pelargonium, Kalanchoe, Grevillea. Recently, 1-MCP had been used to improve other plants such as and Phalaenopsis, Curcuma and Ginger.
  Sudarjat , Andra Leovika , Erni Suminar , Vijaya Isnaniawardhani , Muhamad Abdilah Hasan Qanit , Ardika Albi Fauzi and Syariful Mubarok
  Background and Objective: Dragon fruit is a popular cultivated fruit in Indonesia because of its nutritional value. Recently, farmers have begun to cultivate coloured varieties of dragon fruit such as yellow (Hylocereus megalanthus), red (H. polyrhizus), orange and black (H. Hybrid). However, the morphological characters of these varieties are yet to be elucidated. The objective of this study was to evaluate the morphological characters of four coloured dragon fruit varieties. Materials and Methods: Four dragon fruit genotypes (Hylocereus megalanthus, H. polyrhizus and two H. Hybrid) were cultivated in Pangandaran regency of Indonesia with an altitude of 10 m above sea level with the minimum and maximum temperature of 24 and 37°C, respectively. The experiment was conducted from November, 2017 to September, 2018. About 75 individual plants for each genotype were cultivated. Parameters related to plant growth such as growth rate, stem height, number of shoot and also plant phenotype were recorded during plant growth and development. Results: The result showed that the four dragon fruit genotypes each have different characterizations. The red variety has the best growth condition, while the yellow variety exhibited the lowest growth rate. Conclusion: This study concluded that the red variety is more suitable and adaptable to be cultivated in Pangandaran.
  Erni Suminar , Mita Indriani , Sulistyaningsih , Denny Sobardini , Noladhi Wicaksana and Syariful Mubarok
  Background and Objectives: Establishing new protocol for in vitro propagation of turmeric from vegetative tissue is needed to be studied more due to the demand of turmeric increased every year and also for producing a faster rhizome propagation and free-disease rhizome. The MS solid medium mostly used in in vitro culture. To make a faster explant multiplication, cytokinine must be supplemented to MS medium. The objective of this study was to study the effect of various cytokinins and concentration of Naphthalene Acetic Acid on the explant multiplication of turmeric. Materials and Methods: This study was conducted in the Laboratory of Tissue Culture, Faculty of Agriculture, Universitas Padjajaran. Young shoot of sprout rhizome was cultured in MS basal medium supplemented with different kinds of cytokinins (BAP, TDZ and Zeatin) were combined with 0.01 and 1.0 mg L–1 of NAA. All parameters were tested by analysis of t-student test at the 5% significance level. Results: Three kinds of cytokinins (BAP, TDZ and Zeatin) were combined with 0.01 and 1.0 mg L–1 of NAA and supplemented to MS solid medium. The result showed that TDZ was more effective than BAP and Zeatin for explant multiplication. The supplementation of TDZ combined with NAA resulted the best effect on shoot multiplication resulted in the highest shoot number compared with control but the supplementation of cytokinins affected in the root elongation resulted the short root length. Conclusion: It was concluded that supplementation of cytokinine in MS medium significantly effects on the shoot formation but inhibit the root elongation. The TDZ was the best type of cytokinine that affects shoot multiplication.
  Mira Ariyanti , Syariful Mubarok and Yenni Asbur
  Background and Objective: The study of cover crop in oil palm plantation is more emphasized on its function as soil and water conservation. Cover crop utilization is one of agronomic practice to protect soil surface from any damage caused by rainfall on to the soil surface. Rooting system of the cover crop is able to hold the rain water and in turn maintaining soil water content. This study is aimed to study the effect of Asystasia gangetica (A. gangetica) as cover crop in mature oil palm plantation toward soil water content. Materials and Methods: Research was conducted in mature oil palm plantation. The experiment was conducted by constructing 4×2 m experimental plot between rows of oil palm. The experiment consisted of 2 levels of treatment namely planting cover crop A. gangetica and without planting cover crop. It was repeated 3 times. Hydrological parameter data, precipitation, initial soil water content (SWC), SWC during the experiment at specified soil depth (10, 20, 30, 40 and 50 cm) were observed from each trial plot. Soil water content (SWC) was measured using a sensor that connected with GardSens. Results: The results showed that A. gangetica caused soil water dynamics at the depth 0-20 cm that was at rhizosphere of cover crop. This has a good impact on the water availability of oil palm especially in dry periods when the rate of rainfall less than 60 mm/month. Conclusion: It was concluded that cover crop was able to conserve rain water and increased the water infiltration into the soil. This indicates that cover crop was potentially used to maintain and improve the availability of water requirement for the oil palm plantation.
  Jajang Sauman Hamdani , Anne Nuraini and Syariful Mubarok
  Background and Objective: One problem in introducing potato cultivation in medium land of Indonesia is high temperature which causes low yield of the potato tuber. High temperature improves shoot growth but reduces the formation and development of tuber. To reduce high temperature and inhibit shoot growth, therefore new strategy must be conducted to resolve this problem such as by the application shading net and paclobutrazol during potato cultivation. The objective of this study was to evaluate the interaction effect between shading net and paclobutrazol on growth and yield of potato ‘medians’ tuber of G2 in medium land of Indonesia. Methodology: Randomized block design was used in this study with two factors, consisted of three levels of shading net density (0, 30 and 40%) and 4 levels of paclobutrazol concentration (0, 50, 100 and 150 mg L–1). All parameters were tested by two-ways of analysis of variance (ANOVA) using Fisher test followed by Duncan’s multiple range test at the 5% significance level. Results: The result showed that no significant interaction between shading net density and paclobutrazol concentration at all observed parameters. Shading net 30% increased plant height, leaf area index, tuber number, tuber weight and percentage of tuber for seed size that was significantly higher than without and 45% shading net. Moreover, paclobutrazol suppressed plant height and leaf area but it increased chlorophyll content, tuber number and tuber weight/plant and percentage of tuber for seed size. Conclusion: Paclobutrazol suppressed plant height and leaf area, however it increased leaves chlorophyll content, tuber number and tuber weight/plant. The highest tuber number and percentage of class tuber for seed size were obtained from plant with 50 mg L–1 of paclobutrazol application.
  Sudarjat , Vijaya Isnaniawardhani and and Syariful Mubarok
  Background and Objective: Plant propagation is one the important factors in plant and fruit production. Many problems have been arisen in dragon fruit propagation, such as the yellowing and the rooting inability of cuttings. To solve this problem, the understanding how to choose suitable growing media is needed. This study was conducted to investigate the effects of different growing media compositions on dragon fruit propagation. Materials and Methods: The experiment was conducted in Green House, Faculty of Agriculture, Universitas Padjadjaran from June to September, 2017. Six growing media compositions were used for two species of dragon fruit (H. undatus and H. polyrhizus): soil (v), soil+sand (1:1/v:v), soil+compost (1:1/v:v), soil+vermicompost (1:1/v:v), soil+sand+compost (1:1:1/v:v:v) and soil+sand+vermicompost (1:1:1/v:v:v). Results: The results showed that soil+vermicompost (1:1/v:v) and soil+sand+compost (1:1:1/v:v:v) gave the best growth results for the two dragon fruit species by increasing the number of shoots and the lengths of the shoots. Conclusion: It was concluded that vermicompost was better growing media than compost for propagating dragon fruit by cuttings.
  Anne Nuraini , Sumadi , Syariful Mubarok and Jajang Sauman Hamdani
  Background and Objectives: Potato production in Indonesia, at a medium altitude, can have a number of problems. Therefore, to increase potato productivity, there must be some alternative. One method is with the application of paclobutrazol. The objective of this study is to investigate the effects of application time and paclobutrazol concentration on the yield of potato seeds (G2 of cultivar medians) grown at a medium altitude. Materials and Methods: This experiment was conducted in the Research Station of Agriculture Faculty of Universitas Padjadjaran at an altitude of 685 m a.s.l. with a D3 rainfall rate and inceptisol soil. The experiment used a randomized plot design: The main plot factor was the application time of paclobutrazol at 30 DAP (days after planting) and 45 DAP, with the second factor being the concentration of paclobutrazol at 0, 50, 100 and 150 ppm. All parameters were tested by analysis of Variance (ANOVA), followed by Duncan's multiple range test at the 5% significance level. Results: Results showed there was no interaction between application time and paclobutrazol application on either the growth or yield of G2 potato seeds. However, application of paclobutrazolat45 DAP showed taller plants, with more and heavier tubers compared to application at 30 DAP. Paclobutrazol application reduced the plants’ height, leaf area and dry weight of the plants. On the other hand, it increased chlorophyll content index, numbers of tubers and weight per plant. The use of50 ppm paclobutrazol resulted in the highest number of potato seeds of cultivar medians at 92.3%. Conclusion: In summary, the application of paclobutrazol at 50 ppm and 45 DAP is an optimal application for increased plant productivity of potatoes at medium altitude.
  Jajang Sauman Hamdani , Kusumiyati and Syariful Mubarok
  Background and Objective: In cultivation of crops at medium plains which have a high temperature, the use of shade not only decreases the light intensity but also decreases the temperature and maintains the soil moisture in order to create suitable conditions for the growth of potatoes. Accordingly, the use of both shade and suitable interval of watering on potatoes cultivated at medium plains is expected to increase the yield. The objective of this study was to determine the effect of shade and water interval on plant growth. Materials and Methods: Experimental design used in this research was split- plot design with including some factors, namely, main-plot factor consisted of 2 levels of shading net (without and with), sub-plot factor consisted of 4 levels of watering interval (1, 2, 3 and 4 days). All parameters were tested by two ways of analysis of variance (ANOVA) by Fisher test followed by Duncan’s Multiple Range Test at the 5% significance level. Results: The results showed that there was efficiency on potato yield cultivated in medium plains by watering with the application shade. In shade treated plants the highest yield is obtained at interval watering every 2 day. In treatment with shade, the highest yield was obtained at watering every 3 days, whereas in without shade plants, the highest yield was obtained at watering every 2 days. Conclusion: It would be concluded that the use of shade on Atlantic cultivars potatoes can increase the efficiency of water use so that watering can be done once every 3 days.
  Yayan Sumekar , Denny Kurniadie , Uum Umiyati , Dedi Widayat and Syariful Mubarok
  Background and Objectives: The existence of weeds on potato crops could decrease the productivity of the crops, so that weed control efforts were absolutely necessary. The diversity of dominant weed types needed to be known so that weed control could be done correctly. This study aimed to make dominant weed mapping on potato cultivation in Garut regency. Materials and Methods: This research was conducted using the quadratic method. Two locations of potato plant areas as samples scattered at different altitude or topographic conditions were randomly selected in each sub-district. At each location the sample was weighed diagonally (5 times) for each plot of potato cropping using the iron squares of size 0.5×0.5 m. Field data was used to determine weed species, weed density, weed frequency, weed domination, importance value, summed dominance ratio, weed dry weight and species diversity index. Results: The results showed that the dominant weed species in Cisurupan, Pasirwangi, Cikajang and Cigedug Sub-districts were Galinosoga parviflora (29.66%), Amaranthus spinosus (34.62%), Drymaria vilosa (22.72%) and Cyperus rotundus (21,26%), respectively. The value of diversity index of potato crop acquired in Garut regency ranged from 1.46-2.26 including low-moderate. Conclusion: This study concluded that weeds in highland potato cultivation in Garut regency were dominated by broad-leaved weeds.
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