النشر العلمي

  • Effects of Ethrel, packaging and waxing on quality and shelf life of guava (Psidium guajava L.) fruits

ABSTRACT

 

   Guava is one of the most popular fruits in the Sudan. It is usually harvested at the ripe stage which results in quick deterioration and huge post-harvest losses. Therefore, the objective of this work was to find out the effects of Ethrel, packaging and waxing on quality and shelf life of guava (Psidium guanjava L.) fruits. Experiments were conducted at the University of Gezira, Wad Medani, Sudan, during December of 2013 and  March of  2014. Guava fruits were harvested at the mature-green stage and treated with Ethrel or left as control. Fruits were packaged in either intact or perforated polyethylene film, waxed or left unpackaged. The treatments were set up in a completely randomized design with two replicates. Results showed that Ethrel treatment significantly accelerated the rate of fruit ripening as shown by an increase in total soluble solids, skin colour development, vitamin C content, taste and a decrease in fruit firmness in both seasons. Packaging and waxing treatments had significant effects on weight loss, TSS, vitamin C content, firmness, taste and skin colour in both seasons. Packaging guava fruits in intact polyethylene film resulted in the lowest weight loss, followed by waxing, perforated polyethylene film and the highest weight loss was recorded for the control treatment in both seasons. The highest vitamin C  content, the best  skin colour and the longest shelf life were recorded in fruits packaged in intact polyethylene film followed by perforated, waxing and control treatments in both seasons. However, the highest TSS content, the best taste and the shortest shelf life were recorded for the control fruits in both seasons. It could be  recommended that, in order to prolong the shelf life and maintain the quality of guava fruits, they should be packaged in intact polyethylene film or waxed and treated with Ethrel at destination markets.

 

 

published in مجلة الجزيرة للعلوم الزراعية 14, 2, 2016

  • Current status of sweet orange (Citrus sinensis L.) orchards in the River Nile State, Sudan.

ABSTRACT

Production of sweet oranges in the Sudan does not cover domestic needs and sweet oranges are currently imported from Egypt, Iran and South Africa to satisfy the increasing demand. Hence, there is a need to investigate factors involved in the decline of sweet orange trees in one of the most important States for orange production in the Sudan. This research aims to study and evaluate different agronomic practices contributing to the prevailing sweet orange performance in the River Nile State, Sudan. A questionnaire and interviews with 120 sweet orange growers from Ketiab, Zeidab and Gandato citrus projects indicated that 75.8% of the farmers have orchards less than 2.9 ha. Low yielding cultivars such as “Sinnari”, the local selection (Baladi), Hamlin and Nori 16 dominate in the areas, 96.7% of the trees were budded on sour orange rootstocks, 85.8% of the seedlings were budded in private nurseries using bud wood collected from non-certified mother trees from private orchards. All sweet oranges were grown with other fruit species in 100% of the orchards, 80.8% used flat surface irrigation. There is no fixed fertilizer program. The type and quantity of chemical and organic fertilizers varied with different growers. No foliar fertilizers were used and nutrient deficiencies of Zn, Fe and Mn were observed in most orchards. Extension services for citrus production are highly needed for improvement of yield and quality of sweet oranges in the River Nile State.

 

published in مجلة الجزيرة للعلوم الزراعية 14, 2, 2016

  • Chemical and Sensory Properties of Jam and Nectar Processed from Guava Fruit Fly Resistant Genotypes

Various genotypes of guava fruits from North kordofan and Sennar States were used in jam and nectar processing. The selection of genotypes was based on resistance to the fruit fly pest in addition to the quality of the fruits. The acidity,pH,total soluble solid,vitamin C and sensory evaluation were studied. The total soluble soli were in the range 68-69.Results on pH of jam made from the different of Guava (4,7,12,17 and 19 ) were 3.34,3.42,,3.40, 3.46 and 3.40 respectively. Vitamin C analysis of Kordofan genotypes were in the range 22-37 mg/100 g. The highest score in the sensory evaluation was recorded by jam made of White flesh ( genotype 19 folloed by jam made of  White flesh ( genotype 18 . Findings showed that the sensory evaluation were in the order of White flesh ( genotype 19 )>White flesh ( genotype 18>White flesh ( genotype 17 >White flesh ( genotype 12 >White flesh 7 > White flesh (genotype 4.

published in Journal of Avademia and Industrial Research(JAIR)

  • Greenhouse monitoring and control system based on wireless Sensor Network

published in 10.1109/ICCNEEE.7381396.2015

  • Industrial gamma tomography scan Based on Radiotracer Data Acquisition System

published in IJSR Journal Volume 3 Issue July 2014

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