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| Articles
by
Mahmoud M. Shaaban |
Total Records (
6 ) for
Mahmoud M. Shaaban |
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Mahmoud M. Shaaban
,
Mohamed M. Housein
and
Abdel-Kareem M. El-Saady
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Pot experiment was conducted in the greenhouse of National
Research Centre with 6 barley (Hordeum vulgaris L.) genotypes (Giza
123, Giza 124, Giza 125, Giza 126, Giza 127 and Giza 128) to investigate
the effect of different salinity levels (250, 2000, 4000 and 6000 mg L–1)
in the irrigation water on the nutrient status (uptake, concentrations
and balance) in the shoot tissues. Variations in genotypic tolerance to
salinity stress were also under investigation. Uptakes of N, P, K, Mn
and Cu were significantly declined as salinity dose in the irrigation
water increased. The most affected nutrient ratios were N/P, P/Mn and
P/Zn. Concentrations of nutrients in all studded genotypes were disturbed
and N-concentration was deficient in the shoot tissues of all genotypes
grown under salinity stress, except of Giza 127. Nutrient balances in
all genotypes under investigation were also disturbed. Giza 127 was the
only genotype which nutrient ratios in its shoot tissues were near to
the sufficient ranges. |
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Mohamed M. Hussein
,
Mahmoud M. Shaaban
and
Abdel-Kareem M. El-Saady
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Pot experiment was conducted in the greenhouse of the
National Research Centre to study the effect of two doses (50 and 100
mg L-1) of PK foliar fertilization in the form of K2PO3
on leaf nutrient concentrations and growth parameters of cowpea (Vigna
unguiculata L.) grown under two diluted Mediterranean seawater levels
(3.0, 6.0 dS m-1) in the irrigation water in addition to tap
water (0.4 dS m-1) as control. Diluted seawater as irrigation
led to significant decreases of macro and micronutrients concentrations
in the leaves of cowpea plants. Plant height, number of green leaves,
fresh and dry weights were also negatively affected with high significance
(p0.05) as the plants irrigated with saline water. PK-foliar
fertilization in the form of K2PO3 could increase
P, K and other macro- and micronutrient concentrations in the leaves of
the salt-stressed plants. The most effective dose was the 100 mg L-1
K2PO3 with the lower salinity level (3.0 dS
m-1). Making the plants more tolerant to salinity stress, PK-foliar
fertilization could improve plant growth parameters and increase plant
heights, number of green leaves, fresh and dry weights. |
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Mahmoud M. Shaaban
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Boron is an essential micronutrient for plants. Because of the lake of boron isotope marker shows its physiological and biochemical behavior within the plant tissues, its role in plant cell reactions still unclear. This study reviews boron minerals and distribution in nature, its uptake by plants, its postulated functions in the plants and some of the recent hypotheses concerning the role of boron in plant nutrition. Boron deficiency and toxicity symptoms and their effects on the elemental status, growth and yield of some plants are also reviewed. Since, boron proved to be important for human body, the study reviewed also some of the physiological effects of boron on human health. |
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Mahmoud M. Shaaban
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The effect of two doses of a trace nutrient foliar fertilizer containing 5.2 % Mn, 0.65 % Zn and 0.65 % Cu was studied on the nutrient concentration and balance within the leaves and their impact on the yield and yield components of wheat and maize. Results showed that foliar fertilizer feeding increased the concentrations of Mg, Ca, Fe, Mn, Zn and Cu in the leaves of wheat and maize. In maize leaves, N, P and K were also enhanced especially with the higher dose (T2). Use of the fertilizer led also to nutrient ratios in the leaves near the recommended levels. In wheat, P/Mn, P/Zn and Fe/Zn while in maize, N/P, N/K, N/Fe, P/Mn and P/Zn approached the sufficient levels. This led to significant increases in yield and some of the yield components. Plant heights, number of tillers/plant, grain and straw yields of wheat were significantly increased using the higher dose (T2). Meanwhile, ears No./plant, ear weight, grains weight/ear, weight of 100 grains and yield of maize were significantly increased with both foliar doses (T1& T2) however, T2 was superior in increasing weight of 100 grains and yield. |
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