ALLEVIATION THE NEGATIVE EFFECTS OF PHOSPHORUS- ZINC ANTAGONISM ON GROWTH AND YIELD OF WHEAT (Triticum aestivum L.) GROWN IN NEWLY RECLAIMED SANDY SOILS

Kotb, Maher Abd Alla

doi:10.21608/jpd.2007.44960

Cited by 1 publication

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“…Zinc is imperative for both human development and crop production. Egypt's soils are among those that tend to be deficient in zinc (Khafagy et al 2017 ), soils in areas where wheat is grown often have extremely low levels of plant-available P and Zn, causing widespread P and zinc deficiency in this crop (Kotb 2007 ). Zn deficiency can affect the development of plants and animals since Zn is a regulatory co-factor and structural constituent in proteins and enzymes involved in many biochemical pathways (Cakmak et al 2017 ).…”

Section: Introductionmentioning

confidence: 99%

Biofertilizer effect of some zinc dissolving bacteria free and encapsulated on Zea mays growth

2023

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Crop nutrition depends on zinc for enzymatic, oxidative, and metabolic processes. In the current study 20 different bacteria were isolated from five soil samples collected from different fields in Egypt. Bacterial isolates were screened for their ability to solubilize insoluble zinc oxide and zinc carbonate. The ability of selected isolates to tolerate soluble zinc was determined using different concentrations of (ZnSO4). Three bacterial isolates were selected with efficiency in solubilizing zinc oxide and zinc carbonate while tolerating high levels of soluble zinc. Molecular identification by 16S rRNA sequencing of the chosen isolates identified them as B3 (Acinetobacter calcoaceticus), B5 (Bacillus proteolyticus) and C6 (Stenotrophomonas pavanii). Sodium alginate beads formulated with the isolated bacteria were tested for stability under different storage conditions for 3 months. A pot experiment was conducted to study and compare the effect of using chosen isolates as an in vivo Zn solubilizer with amended ZnCO3 either alone or embedded in beads as carrier in the soil and its effect on growth parameters of Zea mays after 2 months. There was an increase in Zn uptake in all treatments compared to the control. However, plants grown in a pot treated with ZnCO3 and Acinetobacter calcoaceticus showed the highest zinc content and plant dry weight as compared to the control. Finally, selected isolates in both free and encapsulated forms showed improved plant growth parameters and higher zinc content and can be applied as biofertilizers to enhance soil fertility.

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Section: Introductionmentioning

confidence: 99%