SVU-International Journal of Agricultural Sciences http://portal.svu.edu.eg/svu-src/index.php/ijas <p>SVU-International Journal of Agricultural Sciences (SVU-IJAS) is a peer-reviewed international open access official Agricultural Journal of the South Valley University, Egypt and&nbsp;publishes original research articles dealing with Agricultural sciences. Open access: All articles published by SVU-IJAS are made freely and permanently accessible online immediately upon publication, without subscription charges or registration barriers.</p> SVU SRC en-US SVU-International Journal of Agricultural Sciences 2636-3801 Effect of some antioxidant treatments on physical and chemical characters of jerusalem artichoke tubers under cold storage conditions http://portal.svu.edu.eg/svu-src/index.php/ijas/article/view/80 <p>&nbsp;Jerusalem artichoke is one of the non-traditional crops of the family Asteraceae. Its tubers are considered one of the richest vegetable crop in sugars especially inulin. Jerusalem artichoke faces some problems during storage such as tubers browning. The aim of this study was to enhance tubers quality and storability by soaking treatments for 5 min with 3% ascorbic acid, 3% citric acid, 1% calcium chloride or water, which served as control, before storage. The results clearly indicated that 3% ascorbic acid reduced the weight loss and decay. Also, it maintained better tubers appearance as well as higher contents of carbohydrates, total soluble solids, protein and inulin compared to other treatments. The observed effects of ascorbic acid on the tubers quality and storability could be due to its effect on Polyphenol oxidase, whereas its activity was inhibited by ascorbic acid.</p> Mohamed Abdullah A.M. Mounir Copyright (c) 2019 SVU-International Journal of Agricultural Sciences 2019-04-14 2019-04-14 1 1 1 12 Forage and Seed Yield Variation of Alfalfa Cultivars in Response to Planting Date http://portal.svu.edu.eg/svu-src/index.php/ijas/article/view/89 <p>The current work was carried out during 2014/15 and 2015/16 seasons at the Experimental Farm of Agriculture Faculty, South Valley University, Qena Governorate, Egypt to study the direct and indirect effects of yield attributes on forage and seed yields of alfalfa. Six alfalfa genotypes from Egypt (Aswan population, Balady population, El-Dakhla population, Ismalia-1 cultivar, Nitrogen fixing population and Siwa population) beside one variety from USA (Genan) were used in this study. The experiments were laid out in randomized complete block design using split plot arrangement with three replications. Three sowing dates of 20<sup>th</sup> October (D1), 20<sup>th</sup> November (D2) and 20<sup>th</sup> December (D3) were allocated in the main plot while the seven alfalfa genotypes were arranged in the sub plots. Three cuts were taken from each sowing date at 80, 125 and 165 days after sowing at 80, 45- and 40-day intervals, respectively. After taking three cuts, the plants were left out until flowering and seed production which take place in the first week of April, May and June for studied sowing dates, respectively. The obtained results show that, the Ismalia-1 cultivar exceeded the other tested genotypes for seasonal fresh forage yield trait (6.16 kg m<sup>-2</sup>) under third planting date (20<sup>th</sup> December) while, El-Dakhla genotype superior with regard to seasonal dry forage yield (2.00 kg m<sup>-2</sup>) under the same planting date. Otherwise, Aswan population produced the maximum mean values of Seasonal protein forage yield (0.60 kg m<sup>-2</sup>) under second planting date (20<sup>th</sup> November). In addition, Genan cultivar which was introduced from USA gave the maximum seed yield plant (1.20 g) under the first planting date (20<sup>th</sup> October). Furthermore, the obtained results show that the fresh forage yield had the greatest influence on protein forage yield in each sowing date. Meantime, the results of path analysis show that, number of seeds/pod and number of pods/plant considered the most effective traits in seed yield/plant of alfalfa. Moreover, negative correlation between seed yield/plant and 1000-seed weight was observed. Therefore, selection for improving seed yield/plant may be carried directly through selection for number of seeds/pod and number of pods/plant.</p> Mohamed Sayed Hassan M.Z. El-Hifny B.R. Bakheit W.A. Abd El-Rady Copyright (c) 2019 SVU-International Journal of Agricultural Sciences 2019-05-07 2019-05-07 1 1 21 33 Applications of nanoparticles of zinc oxide on productive performance of laying hens http://portal.svu.edu.eg/svu-src/index.php/ijas/article/view/88 <p>This study was conducted to determine the effects of supplementation of nanoparticles of zinc oxide in laying hen diets on laying performance, egg quality, nutrient digestibility, and zinc retention. A total of one hundred and twenty Bovans Brown laying hens (55-week-old) were assigned to four treatment diets including nanoparticles of zinc oxide at 0, 20, 40, or 60 mg/kg, respectively, for 12 weeks. Each treatment had six replicates with five hens each. The results revealed that feed conversion ratio was significantly decreased (linear, P&lt;0.01) with increasing levels of nanoparticles of zinc oxide in laying hens diet from 55-59, 59-63, 63–67 and 55-67 weeks of age. Hen day egg production, egg mass were significantly increased (P&lt;0.05) by supplementation of nanoparticles of zinc oxide during the experimental periods. Moreover, Haugh unit, shell thickness and eggshell percentage were improved (P&lt;0.01) with increasing levels of nanoparticles of zinc oxide. Digestibility of crude protein, ether extract and crude fiber linearly increased (P&lt;0.001) with increasing levels of supplementation. Interestingly the serum biochemical analyses revealed that serum cholesterol, LDL, GOT, GPT, urea and creatinine linearly decreased with increasing Nano-ZnO levels in the diets. In conclusion, inclusion of nanoparticles of zinc oxide at 20, 40, or 60 mg/kg had improved productive performance, Haugh unit, shell quality, nutrient digestibility, cholesterol, liver and kidney functions and can be used as an effective feed additive in laying hens.</p> Mohamed Fawaz A.A.A. Abdel-Wareth H.A. Hassan Karl-Heinz Südekum Copyright (c) 2019 SVU-International Journal of Agricultural Sciences 2019-05-09 2019-05-09 1 1 34 45 Efficacy of Some Pesticide Alternatives on the Desert Locust Schistocerca gregaria (Forskal) Under Laboratory and Field Conditions http://portal.svu.edu.eg/svu-src/index.php/ijas/article/view/96 <p>The efficacy of chlorantraniliprole (Coragen®), spinosad (Tracer®) and fipronil (Coatch®) was tested under laboratory conditions against the 5<sup>th</sup> nymphal instars and adult stages of the Desert Locust <em>Schistocerca</em> <em>gregaria</em> (Forskal), using various concentrations of the mentioned compounds by feeding technique. Fipronil showed the highest efficacy on both stages, followed by spinosad while chlorantraniliprole caused lower mortality. The effect of sublethal concentrations (LC<sub>30</sub>) of the mentioned insecticides on the life span and fledging rate of 5<sup>th</sup> nymphal instar was investigated. 5<sup>th</sup> nymphal instar took 12.6, 15.6 and 11.6 days to fledge in the treatments of chlorantraniliprole, spinosad and fipronil respectively, which are significantly longer than the duration spent by the untreated 5<sup>th</sup> nymphal instar to fledge (8.8 days). Successful fledging rates of 5<sup>th</sup> nymphal instars were 42.6%, 75% and 25% for the treatments of chlorantraniliprole, spinosad and fipronil respectively, which are significantly lower than that of the untreated hoppers (100% fledged successfully). Deformation occurred in 30% of the 5<sup>th</sup> nymphal instars treated by LC<sub>30</sub> of fipronil and spinosad. Field tests, executed in Abu_Ramad, southeast Egypt, showed that chlorantraniliprole at dose rate of 24 g. a. i. /ha, spinosad at dose rate of 15.12 g. a. i. /ha, and fipronil at dose rate of 0.4 g. a. i. /ha, resulted in 98, 99 and 100% mortality to mixed populations of hoppers and adults of <em>S. gregaria</em> within two days of field application.</p> Mahmoud Soliman Karem Mohanna Tharwat Abdel-Fattah Osama Rabie Moustafa Copyright (c) 2019 SVU-International Journal of Agricultural Sciences 2019-05-13 2019-05-13 1 1 46 55 Characteristics of Isolated Starch Granules of Two Sorghum Varieties http://portal.svu.edu.eg/svu-src/index.php/ijas/article/view/73 <p>Sorghum, like other cereals, is a good source of starch, that reached to about 60– 80% of kernels which had an brilliant potential for global industrial claims. In this study, starch had been isolated from tow sorghum varieties (low tannin; Giza 15 and high tannin; Assiut 14) using different extraction procedures (boiling in water and in alkaline media and soaking in alkaline media).Starch yield, gel consistencies, degree of syneresis, gelatinization temperature range, shape and size of starch granules, and starch color had been assayed for the isolated starch. The results revealed that Giza 15 had higher starch yield for all extraction procedures, gels made from (Giza 15) was thinnest than that made from (Assiut 14), the degree of syneresis increased by way of starch gel decrease.&nbsp; Results also showed that neither significant difference of gelatinization temperature between white and pigmented sorghum starches nor between the extractions procedure for the pigmented starch was noted. Giza 15 starch had the highest <em>L</em>* value (91.3) however Assiut 14 variety gave a little darker starch. The pigmented sorghum starch appearance was comparable to that of white variety. The starch granules were mostly spherical and polygonal, with indentations and pores on the surface radial, tube-like channels of granules penetrate from the external surface into a cavity at the hilum, starch granule size of Giza 15 exhibited not significantly difference for larger size compared to that of Assiut 14 extracted using different extraction procedures. The result concluded that the starch isolated from pigmented sorghum grains using the alkaline procedure was comparable to white starches; thereby it could be replace it in the food industry fields.</p> M.A Sorour A.E. Mehanni Eman Mohamed Mamdouh Taha A. K. Rashwan Copyright (c) 2019 SVU-International Journal of Agricultural Sciences 2019-05-21 2019-05-21 1 1 56 69 The effect of dietary doum supplementation on productive and reproductive performance of male rabbits in Upper Egypt http://portal.svu.edu.eg/svu-src/index.php/ijas/article/view/87 <p>TThe objective of this work was conducted to study the effect of Doum <em>(Hyphaenethebaica)</em> supplementation on productive and reproductive performance of rabbit bucks in Upper Egypt during spring season. Thirty- two males16 California (CAL) and 16 Newzland (NEZ) rabbits 8 months old with average initial body weight 3.409±0.05 kg were randomly divided into four groups of 4 bucks each/breed (CAL and NEZ). Group 1 served as control fed a basal diet. Groups 2, 3 and 4 fed basal diets supplemented with 0.3, 0.6 and 0.9 g doum/kg diets, respectively for 12 weeks. The results revealed that doum supplementation significantly (p≤0.01) increased bucks live body weight compared with control group. Ejaculate volume, mass motility, sperm concentration, total sperm output, total motile sperms, live normal sperm, total functional sperm fraction and initial fructose were significantly increased, while reaction time significantly decreased in rabbit bucks received doum compared to control group. Administration of doum increased (P &lt; 0.05) seminal plasma total proteins, globulins, alkaline phosphatase, acid phosphatase and lactate dehydrogenase. Conversely, seminal plasma aspartate aminotransferase and alanine aminotransferase were significantly decreased compared to the control group. Seminal plasma lipid peroxidation as indicated by thiobarbituric acid-reactive substances was significantly decreased while, seminal plasma antioxidant enzymes were significantly increased due to doum supplementation Also, doum supplementation significant increased serum testosterone level .In conclusion, doum supplementation improved semen quality, and seminal plasma antioxidant status of rabbit bucks. Thus, the doum could help to improve productive and reproductive efficiency of rabbit bucks under Upper Egypt condition.</p> H.H.M Hassanien A.A. Baiomy H.A. Hassan Hanan Badry Copyright (c) 2019 SVU-International Journal of Agricultural Sciences 2019-05-21 2019-05-21 1 1 70 82 Effects of nanoparticles of zinc oxide on productive performance of laying hens. – a review http://portal.svu.edu.eg/svu-src/index.php/ijas/article/view/85 <p>Nanotechnology has the potential to revolutionize in poultry industry with new tools for the molecular treatment of diseases and enhancing the ability of animal to absorb nutrients and therefore improving productive performance response of poultry. The essential trace elements play important roles such as nutrients metabolism, antioxidant, component of numerous metalloenzymes and protein. Nanoparticles zinc oxide (Nano-ZnO) is the specially prepared mineral salt having particle size of 1 to 100 nm. It promotes growth can act as antibacterial agent, modulates the immunity and production of laying hens. Using of Nano-ZnO in laying hen's nutrition as nanoparticle size will help and improve the egg production sector. Therefore, the purpose of this study is to give an overview on the potential of Nano-ZnO as feed additives in laying hen diets, in order to explore the mechanism of the effects of Nano-ZnO supplementation on laying hen productive performance and to observe their influence on feed intake, ammonia emissions, digestibility, egg production, and egg quality.</p> Mohamed A. Fawaz Karl-Heinz Südekum Hamdi A. Hassan Ahmed A.A. Abdel-Wareth Copyright (c) 2019 SVU-International Journal of Agricultural Sciences 2019-05-05 2019-05-05 1 1 13 20