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Articles by A.I. Rezk
Total Records ( 4 ) for A.I. Rezk
  El-Nwehy S.S. , A.B. El-Nasharty , A.I. Rezk and O.A. Nofal
  Background and Objective: The negative effects of using low water irrigation quality on plant growth are the major interest of many researchers. So, the present study aimed to use foliar spray with a by-product of yeast production as condensed molasses soluble (CMS), micronutrients and their interaction to improve growth and yield of faba bean and wheat is grown in a calcareous soil under saline stress conditions. Materials and Methods: Two field experiments were carried out at a private farm, in Mariut Sector at Alexandria, Egypt with three replicates by using RCBD design during the 2016/2017 and 2017/2018 seasons. Foliar spraying was applied twice by using (CMS), micronutrients and both of them on faba bean and wheat plants grown in calcareous soil and irrigated with drainage saline water. Results: The results indicate that all treatments led to a significant increase in all the character's under study for both faba bean and wheat. The combination of CMS with micronutrients was the best treatment where it gave the highest values of all the studied characters. Also, the results revealed that the percentage increases were 40, 33, 57 and 64% for seed yield, biological yield, protein (%) and Zn content in seeds, respectively for faba bean, however for wheat was 24, 11, 52 and 51% for seed yield, biological yield, protein (%) and Zn content in grains, respectively compared with the control treatment. Conclusion: It can be concluded that foliar spray by using CMS with micronutrients may help faba bean and wheat plants to decrease salinity effects and improving growth, quality and yield under salinity stress conditions in calcareous soil.
  B. Dib , A.I. Rezk and Mohamed M. El- Fouly
  Syrian Arab Republic is one of the producing and exporting countries of the natural rock phosphate. Its stock is about one billion tons. However, inspite of the existence of this huge amounts, no study has been done on the possibility of using this raw material as P-source for acidic soils, which covers more than 7% of Syrian agricultural areas. These areas are located in the humid and semi-humid regions and severely suffering from phosphorus deficiency. Powdered or dust natural rock phosphate were added to the soils at different rates (700, 1400, 2100 kg ha-1) and compared with Triple Super Phosphate (TSP) as control. Rye Grass was used as a test plant. P content in plants was determined after each cut. Phosphorus absorbed by ray grass plants was maximum by using natural rock phosphate compared with dust phosphate and control. Moreover, the available amounts of residual P2O5 in the soil after harvest give enough stock to the following crop. The addition of natural rock phosphate increased the soil pH with different values depending on kind and rate of the added phosphates, while the TSP reduced it.
  M.F. El-Masri , A. Amberger , Mohamed M. El-Fouly and A.I. Rezk
  A pot experiment was conducted under controlled conditions to study the effect of spraying Zn, Fe and their interactions on pod setting in faba beans. Fe and Zn concentrations were determined in leaves, stems and pods. Faba bean var. Giza 3 was used. Zn treatment increased the number of flowers and pods and percentage of pod setting. Fe showed adverse effects. Zn concentration in all organs was increased by spraying Zn, while it was not affected by spraying Fe. Fe spraying led to increases the Fe content in leaves and stems, while Fe content in pods was decreased. Spraying Zn caused Fe decreases in leaves and pods. Treatments which increased flowering and pod setting showed lower Fe/Zn ratios than the control and vice versa.
  S.S. El-Nwehy , A.I. Rezk , A.B. El-Nasharty , O.A. Nofal and Hanan H. Abdel-Kader
  Background and Objectives: The feasibility of cultivating seawater depends on finding a germplasm resistance to salinity and developing appropriate agricultural techniques. Halophytes have the requisite salt tolerance and produce high biomass or seed yields under seawater irrigation. One of the promising halophytes is Salicornia. The purpose of this study was to evaluate production of Salicornia (Salicornia bigelovii L.) under irrigation with high saline water and influence of fertilization on growth, yield and nutrient content. Materials and Methods: A field experiment was conducted during 2018-2019. Four irrigation treatments (100% seawater, 50% seawater, 25% seawater and 100% well water) were running twice per week. A six fertilization treatments (control, algae extract as foliar and soil applications, NPK (20-20-20) alone or with micronutrients fertilizer (Fe+Mn+Zn+Cu in chelated form) and NPK+micronutrients fertilizer+algae extract were applied in combined with the four irrigation treatments. Results: The highest mean values of growth and seed yield of Salicornia plants were obtained by 50% dilution of seawater treatment. The treatment of algae extract soil with NPK+micronutrients fertilizers were produced the highest relative increase percentages in growth and yield. The combined treatment of NPK+micronutrients fertilizer+algae extract soil treatment in combined with 50% diluted of seawater was recorded the highest values of all parameters. Conclusion: Soil applied of algae extract as a bio-fertilizer with NPK+micronutrients fertilizers gave the highest increasing in Salicornia growth, yield and contents of nutrients, especially at 25 and 50% seawater dilution treatments.
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