Aswan University Journal of Environmental Studies, 2020
Citrus trees (Citrus spp.) considered one of the major fruit worldwide, due to continuous and exc... more Citrus trees (Citrus spp.) considered one of the major fruit worldwide, due to continuous and excessive use of synthetic fertilizers, there is a severe hazard to human health and to environment. The integrated fertilizing system in citrus orchards contributes to improve crop production through eco-friendly nutrient supply, producing healthy fruits, enhancing the plant tolerance to biotic stresses, increases growers' profits, and sustains natural resources. There are numerous types of organic fertilizers used in citrus orchards include Compost, Vermicompost, Humic substances, Biochar, Farm manure, and, microorganisms in biofertilizers increase the amount and availability of essential elements to plant, there are various biofertilizers used for different purposes according to the role of microorganisms like Nitrogen-fixing microorganisms like Azotobacter, Azospirillum, Rhizobium and Frankia; Phosphorous solubilizing microbes such as Pseudomonas and Bacillus; Phosphorous mobilizing as Vascular arbuscular mycorrhiza, and Plant growth promoting rhizobacteria (PGPR). There are numerous beneficial effects of organic and biofertilizers include increasing availability of nutrients in soils, increase the tree productivity, enhancing fruit quality, improve soil properties, stimulate microflora population in the rhizosphere, reducing the harmful effects of pathogenic organisms, and improving plant tolerance to biotic and abiotic stresses, particularly using both organic and biofertilizers play a critical role in environmental conservation, they can compensate large amounts of inorganic, fertilizer , reducing the great amount of inorganic fertilizer used indiscriminately in citrus orchards. Using a consortium of organic and biofertilizers with mineral fertilizers provide a positive response in citrus orchards.
The present study was carried out on fruitful Washington navel orange trees budded on sour orange... more The present study was carried out on fruitful Washington navel orange trees budded on sour orange rootstock planted on clay loamy soil with flood irrigation in El-Qalyobia governorate during two successive seasons 2013 and 2014 to study the effect of foliar application with tryptophan (25 &50 ppm), amino calcium (1%) and potassium nitrate (0.5%) on: fruit set percentage, size of navel-end opening, fruit yield and fruit quality of “Washington” navel orange. Generally, results revealed that, tryptophan at 25 and 50 ppm, were the highest value concerning fruit set percentage, yield (kg/ tree) and improved vegetative growth characteristics. Whereas, amino calcium treatment showed the highest percentage of closed navelend opening fruits followed by tryptophan (25 & 50 ppm). While, potassium nitrate treatment significantly increased fruit total soluble solids.On the other hand, leaf chemical properties total sugars, tryptophan, indoles, N, P, K, Ca and B were determined and reflect varied...
Aswan University Journal of Environmental Studies (AUJES) , 2020
Citrus trees (Citrus spp.) considered one of the major fruit worldwide, due to continuous and exc... more Citrus trees (Citrus spp.) considered one of the major fruit worldwide, due to continuous and excessive use of synthetic fertilizers, there is a severe hazard to human health and to environment. The integrated fertilizing system in citrus orchards contributes to improve crop production through eco-friendly nutrient supply, producing healthy fruits, enhancing the plant tolerance to biotic stresses, increases growers’ profits, and sustains natural resources. There are numerous types of organic fertilizers used in citrus orchards include Compost, Vermicompost, Humic substances, Biochar, Farm manure, and, microorganisms in biofertilizers increase the amount and availability of essential elements to plant, there are various biofertilizers used for different purposes according to the role of microorganisms like Nitrogen-fixing microorganisms like Azotobacter, Azospirillum, Rhizobium and Frankia; Phosphorous solubilizing microbes such as Pseudomonas and Bacillus; Phosphorous mobilizing as Vascular arbuscular mycorrhiza, and Plant growth promoting rhizobacteria (PGPR). There are numerous beneficial effects of organic and biofertilizers include increasing availability of nutrients in soils, increase the tree productivity, enhancing fruit quality, improve soil properties, stimulate microflora population in the rhizosphere, reducing the harmful effects of pathogenic organisms, and improving plant tolerance to biotic and abiotic stresses, particularly using both organic and biofertilizers play a critical role in environmental conservation, they can compensate large amounts of inorganic, fertilizer, reducing the great amount of inorganic fertilizer used indiscriminately in citrus orchards. Using a consortium of organic and biofertilizers with mineral fertilizers provide a positive response in citrus orchards.
Aswan University Journal of Environmental Studies, 2020
Citrus trees (Citrus spp.) considered one of the major fruit worldwide, due to continuous and exc... more Citrus trees (Citrus spp.) considered one of the major fruit worldwide, due to continuous and excessive use of synthetic fertilizers, there is a severe hazard to human health and to environment. The integrated fertilizing system in citrus orchards contributes to improve crop production through eco-friendly nutrient supply, producing healthy fruits, enhancing the plant tolerance to biotic stresses, increases growers' profits, and sustains natural resources. There are numerous types of organic fertilizers used in citrus orchards include Compost, Vermicompost, Humic substances, Biochar, Farm manure, and, microorganisms in biofertilizers increase the amount and availability of essential elements to plant, there are various biofertilizers used for different purposes according to the role of microorganisms like Nitrogen-fixing microorganisms like Azotobacter, Azospirillum, Rhizobium and Frankia; Phosphorous solubilizing microbes such as Pseudomonas and Bacillus; Phosphorous mobilizing as Vascular arbuscular mycorrhiza, and Plant growth promoting rhizobacteria (PGPR). There are numerous beneficial effects of organic and biofertilizers include increasing availability of nutrients in soils, increase the tree productivity, enhancing fruit quality, improve soil properties, stimulate microflora population in the rhizosphere, reducing the harmful effects of pathogenic organisms, and improving plant tolerance to biotic and abiotic stresses, particularly using both organic and biofertilizers play a critical role in environmental conservation, they can compensate large amounts of inorganic, fertilizer , reducing the great amount of inorganic fertilizer used indiscriminately in citrus orchards. Using a consortium of organic and biofertilizers with mineral fertilizers provide a positive response in citrus orchards.
The present study was carried out on fruitful Washington navel orange trees budded on sour orange... more The present study was carried out on fruitful Washington navel orange trees budded on sour orange rootstock planted on clay loamy soil with flood irrigation in El-Qalyobia governorate during two successive seasons 2013 and 2014 to study the effect of foliar application with tryptophan (25 &50 ppm), amino calcium (1%) and potassium nitrate (0.5%) on: fruit set percentage, size of navel-end opening, fruit yield and fruit quality of “Washington” navel orange. Generally, results revealed that, tryptophan at 25 and 50 ppm, were the highest value concerning fruit set percentage, yield (kg/ tree) and improved vegetative growth characteristics. Whereas, amino calcium treatment showed the highest percentage of closed navelend opening fruits followed by tryptophan (25 & 50 ppm). While, potassium nitrate treatment significantly increased fruit total soluble solids.On the other hand, leaf chemical properties total sugars, tryptophan, indoles, N, P, K, Ca and B were determined and reflect varied...
Aswan University Journal of Environmental Studies (AUJES) , 2020
Citrus trees (Citrus spp.) considered one of the major fruit worldwide, due to continuous and exc... more Citrus trees (Citrus spp.) considered one of the major fruit worldwide, due to continuous and excessive use of synthetic fertilizers, there is a severe hazard to human health and to environment. The integrated fertilizing system in citrus orchards contributes to improve crop production through eco-friendly nutrient supply, producing healthy fruits, enhancing the plant tolerance to biotic stresses, increases growers’ profits, and sustains natural resources. There are numerous types of organic fertilizers used in citrus orchards include Compost, Vermicompost, Humic substances, Biochar, Farm manure, and, microorganisms in biofertilizers increase the amount and availability of essential elements to plant, there are various biofertilizers used for different purposes according to the role of microorganisms like Nitrogen-fixing microorganisms like Azotobacter, Azospirillum, Rhizobium and Frankia; Phosphorous solubilizing microbes such as Pseudomonas and Bacillus; Phosphorous mobilizing as Vascular arbuscular mycorrhiza, and Plant growth promoting rhizobacteria (PGPR). There are numerous beneficial effects of organic and biofertilizers include increasing availability of nutrients in soils, increase the tree productivity, enhancing fruit quality, improve soil properties, stimulate microflora population in the rhizosphere, reducing the harmful effects of pathogenic organisms, and improving plant tolerance to biotic and abiotic stresses, particularly using both organic and biofertilizers play a critical role in environmental conservation, they can compensate large amounts of inorganic, fertilizer, reducing the great amount of inorganic fertilizer used indiscriminately in citrus orchards. Using a consortium of organic and biofertilizers with mineral fertilizers provide a positive response in citrus orchards.
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Papers by Amgad Elazazy
production through eco-friendly nutrient supply, producing healthy fruits, enhancing the plant tolerance to biotic stresses, increases growers’ profits, and sustains natural resources. There are numerous types of organic fertilizers used in citrus orchards include Compost, Vermicompost, Humic substances, Biochar, Farm manure, and, microorganisms in biofertilizers increase the amount and availability of essential elements to plant, there are various biofertilizers used for different purposes according to the role of microorganisms like Nitrogen-fixing microorganisms like Azotobacter, Azospirillum, Rhizobium and Frankia; Phosphorous solubilizing microbes such as Pseudomonas and Bacillus; Phosphorous mobilizing as Vascular arbuscular mycorrhiza, and Plant growth promoting rhizobacteria (PGPR). There are numerous beneficial effects of organic and biofertilizers include increasing availability of nutrients in soils, increase the tree productivity, enhancing fruit quality, improve soil properties, stimulate microflora population in the rhizosphere, reducing the
harmful effects of pathogenic organisms, and improving plant tolerance to biotic and abiotic stresses, particularly using both organic and biofertilizers play a critical role in environmental conservation, they can compensate large amounts of inorganic, fertilizer, reducing the great amount of inorganic fertilizer used indiscriminately in citrus orchards. Using a consortium of organic and biofertilizers with mineral fertilizers provide a positive response in citrus orchards.
production through eco-friendly nutrient supply, producing healthy fruits, enhancing the plant tolerance to biotic stresses, increases growers’ profits, and sustains natural resources. There are numerous types of organic fertilizers used in citrus orchards include Compost, Vermicompost, Humic substances, Biochar, Farm manure, and, microorganisms in biofertilizers increase the amount and availability of essential elements to plant, there are various biofertilizers used for different purposes according to the role of microorganisms like Nitrogen-fixing microorganisms like Azotobacter, Azospirillum, Rhizobium and Frankia; Phosphorous solubilizing microbes such as Pseudomonas and Bacillus; Phosphorous mobilizing as Vascular arbuscular mycorrhiza, and Plant growth promoting rhizobacteria (PGPR). There are numerous beneficial effects of organic and biofertilizers include increasing availability of nutrients in soils, increase the tree productivity, enhancing fruit quality, improve soil properties, stimulate microflora population in the rhizosphere, reducing the
harmful effects of pathogenic organisms, and improving plant tolerance to biotic and abiotic stresses, particularly using both organic and biofertilizers play a critical role in environmental conservation, they can compensate large amounts of inorganic, fertilizer, reducing the great amount of inorganic fertilizer used indiscriminately in citrus orchards. Using a consortium of organic and biofertilizers with mineral fertilizers provide a positive response in citrus orchards.