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Articles by Mahmoud M. Shaaban
Total Records ( 7 ) for Mahmoud M. Shaaban
  Mahmoud M. Shaaban and El-Zanaty A.A. Abou El-Nour
  Nitrogen fertilization under salinity stress is of main concern to be investigated, especially in the arid and semiarid regions. Pot experiment was conducted in the greenhouse of the "Micronutrient Project", Fertilization Technology Department, National Research Centre, Dokki, Cairo, Egypt with Wheat (Triticum aestivum L. var. Gemieza9 ). Plants were grown on sandy soil under salinity stress to study their response to soil application of different nitrogen sources compared to those irrigated with tap water. Nitrogen fertilization was added to the pots in the rate of 168 kg N ha-1 as urea, ammonium nitrate, calcium nitrate or ammonium sulfate. Fifteen days after sowing, half of the pots of every treatment were irrigated regularly with tap water (S1) and the other half was irrigated with saline water (S2). Results showed that salinity stress of irrigation water significantly inhibited growth parameters in terms of plant height, fresh weight and dry weight accumulation. Nitrogen form significantly interacted with salinity stress of irrigation water. The highest reduction in all determined parameters was recorded with urea, while very slight or none with calcium nitrate. Macro- and micro-nutrient concentration and uptake by wheat shoots were significantly affected by salinity stress of irrigation water. The best uptake of almost all determined nutrients was achieved by calcium nitrate fertilizer, especially under salinity stress conditions. Thus among the used N- forms, calcium nitrate is the best nitrogen form can alleviate the harmful effects of saline ions and realizing good plant growth under salinity stress of irrigation water.
  Mahmoud M. Shaaban and El-Zanaty A.A. Abou El- Nour
  Silicon was reported to play a role in increasing plant resistance to biotic and abiotic stress. Pot experiment was conducted in the greenhouse of the "Micronutrient Project", Fertilization Technology Department, National Research Centre, Dokki, Cairo, Egypt with (Zea maize L. var. Pioneer) grown on silty loam soil to study effect of K-silicate foliar fertilization on concentrations and uptake of nutrients by plant seedlings. The plants were sown on mid May, 2012 in Mitscherlich pots contained 7.0 kg sandy soil. The experiment followed the Randomized Complete Block Design (RCBD) with nine treatments, in three replicates. The K-silicate was foliar sprayed two times in the concentrations of 300, 600 and 900 mg L-1. The first spray was 21 days after sowing and the second was 10 days after the first one. One third of the experimental pots was irrigated with tap water, the second third was irrigated with water contains 4134 mg L-1 saline ions and the last third of pots was irrigated with water contains 5594 mg L-1 saline ions. Data revealed that despite the increase of sodium concentrations in the seedling tissues due to irrigation with saline water, other nutrient concentrations were slightly affected (p = 0.05). The K-silicate foliar fertilization found also to significantly affect concentrations and uptake of the determined micronutrients iron (Fe), zinc (Zn), manganese (Mn) and copper (Cu). Iron concentration was increased as K-silicate was added in the tissues of both plants irrigated with fresh or saline water. The best dose was 600-900 mg L-1. The same trend was almost found with Zn and Mn while Cu showed no trend, however, its concentrations were higher than that determined for control plants. The best dry weight accumulation (4.1 g per plant) was achieved by the treatment 600 mg L-1 K-silicate on the plants irrigated with fresh water. The best dose gave the highest dry matter accumulation with the plants irrigated with saline water was also 600 mg L-1 K-silicate with low level salinity (2.8 g per plant) and 300 mg L-1 K-silicate with the higher level salinity in irrigation water (2.13 g per plant). Despite K-silicate could keep the concentrations of nutrients in the normal ranges, however, salinity of irrigation water found to interfere with dry matter synthesis and negatively affect dry matter accumulation. Thus, silicon treatment can be only partially alleviating salinity stress on maize plants.
  Mahmoud M. Shaaban , Otmar Loehnertz and Mohamed M. El-Fouly
  Pot experiment was conducted in the greenhouse of Soil Science and Plant Nutrition Department, Geisenheim, Germay with 3 Egyptian and 3 German grapevine cultivars grown under low (1.5%) and high (20%) carbonate in the soil. The experiment aimed at studying the capacity of different grapevine cultivars to macro- and micronutrient utilization under high soil carbonate conditions and how far micronutrients foliar application can recover lime-induced chlorosis. Data revealed that high lime content of the soil caused depression of total concentrations of nitrogen, phosphorus, iron and manganese in the leaves of all cultivars and decreased magnesium, zinc and copper in leaves of Egyptian cultivars. Potassium and calcium concentrations in the leaves were increased as an effect of high lime in the soil. Acid soluble iron concentrations were decreased with the plant age, however decreases were more severe in the leaves of cultivars grown under high lime conditions, especially for the Egyptian cultivars. Acid soluble iron was mostly proportional to total chlorophyll content in the leaves and the German cultivars were more resistant to chlorosis than the Egyptian cultivars. Micronutrients foliar applications could increase acid soluble iron and zinc concentrations and consequently chlorophyll content of the leaves. The best treatment was the combination of iron, zinc and manganese.
  Mostafa S.A. Khattab , Ahmed M. Abd El Tawab , Fatma I. Hadhoud and Mahmoud M. Shaaban
  Background and Objectives: Improving ruminant environmental impacts and productivity get a great interest in last years, herbal plants were investigated as feed additive for decreasing gas production from rumen and enhancing nutrients digestibility. So, in the current study was carried out to investigate the effect of supplementing ruminant diets with different levels of thyme or celery on rumen fermentation, digestibility and gas production. Materials and Methods: Seven experimental treatments were done using rumen in vitro batch culture technique. Treatments were: 60% CFM, 40% clover hay (control), control diet+5 g thyme kg1 DM (T1), control diet+10 g thyme kg1 DM (T2), control diet+20 g thyme kg1 DM (T3), control diet+5 g1 celery kg1 DM (T4), control diet+10 g1 celery kg1 DM (T5), control diet+20 g celery kg1 DM (T6), control diet+0.4 g salinomycin kg1 DM (T7). Results: The obtained results showed no significant (p>0.05) change in ruminal pH, neutral detergent fiber (NDF) and acid detergent fiber (ADF) degradation. Thyme addition to diet (T1 and T2) significantly lowered (p<0.05) total gas production (TGP) compared with control (152, 152 vs. 157 mL, respectively). Dry matter and organic matter disappearance (DMd, OMd) appeared showed no significant difference (p<0.05) between control and thyme treatments (T1, T2 and T3) and celery treatments (T4, T5 and T6). Conclusion: It could be concluded the adding thyme or celery at low levels to ruminant diets could improve ruminal fermentation and reducing gas production without adverse effect on nutrients digestibility.
  Ahmed A. Aboamer , Hossam M. Ebeid , Mahmoud M. Shaaban , Ramadan M.A. Gawad , Mohamed M. Mostafa and Aboelfetoh M. Abdalla
  Background and Objectives: The use of non-traditional oilseeds such as Moringa oleifera Lam seeds has being an attractive as feed resource for livestock production. The objective of this study was to evaluate moringa seed cake (MSC) as an alternative source of protein in lactating ewe’s ration. Materials and Methods: The control diet consists of concentrate mix and Egyptian clover hay (50:50). Cotton seed meal was substituted by MSC at two levels (2.5 and 5%). Three trials were conducted. An in vitro true dry matter (IVTDM) and fiber fractions digestibility were determined using the batch culture system. In vitro gas production (GP) technique was used to determine the amount of gas produced over a 3, 6, 12 and 24 h incubation. For the lactation trial, twenty-one of lactating Ossimi ewes were assigned into three groups using complete random design to study the effect of MSC on animal performance. Results: Total GP after 24 h and potential extent of GP were significantly (p<0.05) increased, while the rate of release was significantly (p<0.05) decreased for ewes fed MSC levels. The highest digestibility values were observed for the group fed MSC at a level of 2.5%. Daily fat-corrected milk and composition were significantly (p<0.05) improved in ewes fed MSC at level 2.5%. However, increasing levels to 5% significantly (p<0.05) decrease milk production and composition. Conclusion: Moringa seed cake could be included in lactating ewes’ diets as a source of protein at a low level (2.5%) to improve milk production performance without any adverse effect.
  Mahmoud M. Shaaban
  The effect of using dry microalga (Chlorella vulgaris) as soil additives on the nutrient status and shoot and root growth of maize plants (Zea mays L. var. Triple-hybrid 310) was investigated. Algae were added to the soil before sowing in the rates of 50, 100, 150 and 200 Kg /Fed, in addition to the basic NPK fertilizers. Significant increase in the nutrient taken up by shoots and roots was calculated as a result of adding different alga-levels. Addition of algae has significant increases in root volume, chlorophyll formation, dry weight of shoots and roots as well as plant height. The best treatments were 150 and 200Kg algae/Fed.
  Mahmoud M. Shaaban , Mostafa A. El-Nabarawy and El-Zanaty A.A. Abou El-Nour
  A field study was carried out to determine magnesium and iron status in economically important field crops wheat, maize and sugarbeet as well as snap bean and potatoes grown under field conditions using the portable chlorophyll meter. The meter readings showed non-significant correlations with Mg-concentration in wheat leaves while iron concentrations were negatively correlated with the apparatus readings. Both Mg and Fe concentrations in maize leaves were negatively correlated with the meter readings. In contrast, Mg and Fe concentrations in sugarbeet, snap bean and potatoes leaves showed highly significant positive correlations with chlorophyll-meter readings. Thus, it is suggested that the apparatus can be used to predict Mg and Fe status for dicot short-life crops. Because of their accumulation under unbalanced fertilization, the meter, like any other tool, could not express the actual needs for Mg and Fe for monocot cereals.
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