Pub Date : 2022-08-01DOI: 10.21608/ejoh.2022.141393.1202
Ahmed Abd El-Rahim, Hassan Elwakeel, A. Abdel-Hamid, N. Mansour
A TWO years study was carried out during two successive seasons (2017 and 2018) on seven years old Early Sweet grapevines budded on Freedom and Salt Creek rootstocks grown in sandy loam soil, spaced at 2 X 3 meters apart under a drip irrigation system in a private grapevines orchard located on Cairo-Alexandria desert road about 50 km from Cairo, Egypt. The main objective is to study the effect of nitrogen supported with potassium and two rootstocks salt Creek and Freedom as well as their combinations on yield and fruit quality properties of Early Sweet grape vine. The study was arranged in a split plot design, hence two rootstocks (Freedom and Salt creek) were occupied in the main plot, and the subplots were split by (N+K) application levels. Whereas, three levels of nitrogen (30, 40 and 50 kg /fed) as actual nitrogen were applied. Potassium levels were added at the ratio (1:1.5 and 1:2) from nitrogen level plus control treatment was (60kg N/fed+120kgK/fed). Obtained results showed that, fertilization with high rates of nitrogen reduced cluster weight, cluster length, and cluster width of “Early Sweet” Generally, Early Sweet grapevine grafted on Salt creek rootstock fertilized with 40kg N/fed plus 80kg K/fed proved to be the most efficient effect application on yield and fruit quality.
{"title":"Rootstock Effects on Yield, Fruit Quality and Nutrition Status of \"Early Sweet\" Grape Fertilized with Varying levels of Nitrogen and Potassium","authors":"Ahmed Abd El-Rahim, Hassan Elwakeel, A. Abdel-Hamid, N. Mansour","doi":"10.21608/ejoh.2022.141393.1202","DOIUrl":"https://doi.org/10.21608/ejoh.2022.141393.1202","url":null,"abstract":"A TWO years study was carried out during two successive seasons (2017 and 2018) on seven years old Early Sweet grapevines budded on Freedom and Salt Creek rootstocks grown in sandy loam soil, spaced at 2 X 3 meters apart under a drip irrigation system in a private grapevines orchard located on Cairo-Alexandria desert road about 50 km from Cairo, Egypt. The main objective is to study the effect of nitrogen supported with potassium and two rootstocks salt Creek and Freedom as well as their combinations on yield and fruit quality properties of Early Sweet grape vine. The study was arranged in a split plot design, hence two rootstocks (Freedom and Salt creek) were occupied in the main plot, and the subplots were split by (N+K) application levels. Whereas, three levels of nitrogen (30, 40 and 50 kg /fed) as actual nitrogen were applied. Potassium levels were added at the ratio (1:1.5 and 1:2) from nitrogen level plus control treatment was (60kg N/fed+120kgK/fed). Obtained results showed that, fertilization with high rates of nitrogen reduced cluster weight, cluster length, and cluster width of “Early Sweet” Generally, Early Sweet grapevine grafted on Salt creek rootstock fertilized with 40kg N/fed plus 80kg K/fed proved to be the most efficient effect application on yield and fruit quality.","PeriodicalId":40934,"journal":{"name":"EGYPTIAN JOURNAL OF VETERINARY SCIENCE","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46890480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-01DOI: 10.21608/ejoh.2022.165538.1212
M. El-kenawy, Bassam El-Sayed A. Belal, Magda N. Mohamed
T HE GENERAL trend of expanding in the cultivation of grapes in the Delta region de-pends on the cultivation of grafted cultivars on different rootstocks, with a preference for the cultivation of H4 strain grafted over the Thomson Seedless grafted. The aim of this study was to evaluate grafting Thomson Seedless and H4 strain cultivars on three different rootstocks (Freedom, Salt Creek, and SO4) compared with non-grafted (own rooted) to select the most suitable rootstock under clay soil conditions and surface irrigation system of the Delta region, Egypt. This experiment was conducted over four consecutive seasons (2019, 2020, 2021, and 2022), and the data were taken during the 2021 and 2022 seasons. Results showed that grafting Thomson Seedless and H4 strain cultivars on Freedom, Salt Creek and SO4 rootstocks was better than non-grafted(own rooted) on improving all studied parameters. The best results for all studied parameters were obtained when the vines were grafted on Freedom followed by Salt Creek followed by SO4. In addition, the obtained results showed that the H4 strain grafted on Freedom rootstock recorded the significant highest values as compared with Thomson Seedless grafted on Freedom in most studied parameters. Therefore, it is recommended to graft Thomson Seedless and H4 strain cultivars on Freedom rootstock under the conditions of clay soil and surface irrigation system in the Delta region, with preference planting of the H4 strain due toits good vegetative growth, high cluster weight, and yield. However, further studies to reduce the compactness coefficient of clusters are essential in this strain.
{"title":"Effect of Some Rootstocks on Vegetative Growth, Nutrient Content, Yield and Quality of Thompson Seedless Grapevines and H4 Strain under Conditions of Egyptian Delta Region","authors":"M. El-kenawy, Bassam El-Sayed A. Belal, Magda N. Mohamed","doi":"10.21608/ejoh.2022.165538.1212","DOIUrl":"https://doi.org/10.21608/ejoh.2022.165538.1212","url":null,"abstract":"T HE GENERAL trend of expanding in the cultivation of grapes in the Delta region de-pends on the cultivation of grafted cultivars on different rootstocks, with a preference for the cultivation of H4 strain grafted over the Thomson Seedless grafted. The aim of this study was to evaluate grafting Thomson Seedless and H4 strain cultivars on three different rootstocks (Freedom, Salt Creek, and SO4) compared with non-grafted (own rooted) to select the most suitable rootstock under clay soil conditions and surface irrigation system of the Delta region, Egypt. This experiment was conducted over four consecutive seasons (2019, 2020, 2021, and 2022), and the data were taken during the 2021 and 2022 seasons. Results showed that grafting Thomson Seedless and H4 strain cultivars on Freedom, Salt Creek and SO4 rootstocks was better than non-grafted(own rooted) on improving all studied parameters. The best results for all studied parameters were obtained when the vines were grafted on Freedom followed by Salt Creek followed by SO4. In addition, the obtained results showed that the H4 strain grafted on Freedom rootstock recorded the significant highest values as compared with Thomson Seedless grafted on Freedom in most studied parameters. Therefore, it is recommended to graft Thomson Seedless and H4 strain cultivars on Freedom rootstock under the conditions of clay soil and surface irrigation system in the Delta region, with preference planting of the H4 strain due toits good vegetative growth, high cluster weight, and yield. However, further studies to reduce the compactness coefficient of clusters are essential in this strain.","PeriodicalId":40934,"journal":{"name":"EGYPTIAN JOURNAL OF VETERINARY SCIENCE","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42947564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-01DOI: 10.21608/ejoh.2022.151882.1205
Mina S. F. Samaan, M. Nasser
T HIS work aimed to establish an in vitro protocol for Blackberry “Karaka Black” micropropagation. Stem node explants were experimented on three types of medium salts (WPM, MS and B5) in establishment stage. Also, three types of cytokinins were tested for multiplication i.e. BA (0.0, 0.4, 0.8 and 1.2 ppm), TDZ (0.0, 0.1, 0.5 and 1.0 ppm) and Kin (0.0, 1.0, 5.0 and 10.0 ppm). Two soil mixtures were used in acclimatization stage. Finally, the effect of passage time and number of subcultures on multiplication rate were investigated. The results indicated that WPM followed by MS medium gave the highest shoot length and leaf number. BA at 0.4 ppm, Kin at 5.0 ppm and TDZ at 0.1 ppm achieved the most preferable values for multiplication stage but the kinetin one gave the healthiest plantlets. The most microshoots got well-formed roots in multiplication phase. Consequently, rooting stage was not required. The multiplication rate slightly decreased after the 3 rd subculture and three months of culture date proved to be the most suitable passage time among subcultures. Peatmoss and sand mixture gave the highest plantlet quality during acclimatization.
{"title":"Micropropagation of Blackberry (Rubus fruticosus.) cv. Karaka Black","authors":"Mina S. F. Samaan, M. Nasser","doi":"10.21608/ejoh.2022.151882.1205","DOIUrl":"https://doi.org/10.21608/ejoh.2022.151882.1205","url":null,"abstract":"T HIS work aimed to establish an in vitro protocol for Blackberry “Karaka Black” micropropagation. Stem node explants were experimented on three types of medium salts (WPM, MS and B5) in establishment stage. Also, three types of cytokinins were tested for multiplication i.e. BA (0.0, 0.4, 0.8 and 1.2 ppm), TDZ (0.0, 0.1, 0.5 and 1.0 ppm) and Kin (0.0, 1.0, 5.0 and 10.0 ppm). Two soil mixtures were used in acclimatization stage. Finally, the effect of passage time and number of subcultures on multiplication rate were investigated. The results indicated that WPM followed by MS medium gave the highest shoot length and leaf number. BA at 0.4 ppm, Kin at 5.0 ppm and TDZ at 0.1 ppm achieved the most preferable values for multiplication stage but the kinetin one gave the healthiest plantlets. The most microshoots got well-formed roots in multiplication phase. Consequently, rooting stage was not required. The multiplication rate slightly decreased after the 3 rd subculture and three months of culture date proved to be the most suitable passage time among subcultures. Peatmoss and sand mixture gave the highest plantlet quality during acclimatization.","PeriodicalId":40934,"journal":{"name":"EGYPTIAN JOURNAL OF VETERINARY SCIENCE","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47973010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-01DOI: 10.21608/ejoh.2022.156300.1208
S. Attia
T HE effects of preharvest foliar application of salicylic acid, calcium acetate and proline alone or in combinations on fruit quality and storability of “Early Sweet” peaches cultivar were investigated during 2020 and 2021 seasons. The results showed that preharvest application of all treatments increased fruit flesh firmness as compared with control treatment. Salicylic acid treatment increased fruit weight, size and diameter. Moreover, decreased total sugars and fruit weight loss after storage. The results also showed that, calcium acetate treatment enhanced physical and chemical properties of fruits especially fruit firmness before and after harvest. Proline treatment increased fruit weight, fruit diameter, flesh firmness , TSS, peel anthocyanin content and total sugars. Furthermore, decreased fruit acidity and weight loss after storage on room temperature. In conclusion, the results of the present study recommended using the combination of salicylic acid plus calcium acetate and proline to enhance fruit quality and shelf life of peaches.
{"title":"Preharvest Application of Salicylic Acid, Calcium Acetate and Proline for Improving Fruit Quality and Shelf Life of “Early Swelling” Peaches","authors":"S. Attia","doi":"10.21608/ejoh.2022.156300.1208","DOIUrl":"https://doi.org/10.21608/ejoh.2022.156300.1208","url":null,"abstract":"T HE effects of preharvest foliar application of salicylic acid, calcium acetate and proline alone or in combinations on fruit quality and storability of “Early Sweet” peaches cultivar were investigated during 2020 and 2021 seasons. The results showed that preharvest application of all treatments increased fruit flesh firmness as compared with control treatment. Salicylic acid treatment increased fruit weight, size and diameter. Moreover, decreased total sugars and fruit weight loss after storage. The results also showed that, calcium acetate treatment enhanced physical and chemical properties of fruits especially fruit firmness before and after harvest. Proline treatment increased fruit weight, fruit diameter, flesh firmness , TSS, peel anthocyanin content and total sugars. Furthermore, decreased fruit acidity and weight loss after storage on room temperature. In conclusion, the results of the present study recommended using the combination of salicylic acid plus calcium acetate and proline to enhance fruit quality and shelf life of peaches.","PeriodicalId":40934,"journal":{"name":"EGYPTIAN JOURNAL OF VETERINARY SCIENCE","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46918726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-01DOI: 10.21608/ejoh.2022.145416.1203
M. Mohamed, Ebtsam M. Hamza
B acopa monnieri (BM) is an endangered plant with great pharmaceutical uses. This work aims to improve the protocol of mass propagation, establish a cultivation system in the newly reclaimed lands and estimate the quantitative phytochemical and fingerprint of the cultivated plants. Numerous factors affected micropropagation; i.e , MS strength, growth regulators concentrations and types of explant. The highest shoot number and growth vigor were observed on 3/4 MS strength supplemented with 0.5 mg/l BA and big cluster as an explant. The highest roots number was obtained from 2.0 mg/l IAA and 0.1%AC. The acclimatization systems significantly affected the acclimatization of B. monnieri . The culture mills system possessed the highest acclimatized number followed by pots. The cultivation distance affected plant fresh and dry weight through 80 days of cultivation, 60cm cultivation distance was the best. The fingerprint of the cultivated plants was determined through eleven RAPD and thirteen ISSR primers. The number of AF differed according to the implemented molecular marker. The RAPD primers produced 34 AF, while ISSR gave 24 AF. The RAPD and ISSR were effective to determine the BM fingerprint. The quantitative analysis using HPLC stated that the main phenolic components in the ethanol/water extract were Chlorogenic acid and Gallic acid (330.36 µg/g and 309.86 µg/g, respectively). The Quercetin concentration was 42.99 µg/g. While the main flavonoid compound was rutin with a concentration of 506.36µg/g.
{"title":"Mass propagation, Cultivation, Phytochemical and Fingerprint of Bacopa monnieri L. in Egypt","authors":"M. Mohamed, Ebtsam M. Hamza","doi":"10.21608/ejoh.2022.145416.1203","DOIUrl":"https://doi.org/10.21608/ejoh.2022.145416.1203","url":null,"abstract":"B acopa monnieri (BM) is an endangered plant with great pharmaceutical uses. This work aims to improve the protocol of mass propagation, establish a cultivation system in the newly reclaimed lands and estimate the quantitative phytochemical and fingerprint of the cultivated plants. Numerous factors affected micropropagation; i.e , MS strength, growth regulators concentrations and types of explant. The highest shoot number and growth vigor were observed on 3/4 MS strength supplemented with 0.5 mg/l BA and big cluster as an explant. The highest roots number was obtained from 2.0 mg/l IAA and 0.1%AC. The acclimatization systems significantly affected the acclimatization of B. monnieri . The culture mills system possessed the highest acclimatized number followed by pots. The cultivation distance affected plant fresh and dry weight through 80 days of cultivation, 60cm cultivation distance was the best. The fingerprint of the cultivated plants was determined through eleven RAPD and thirteen ISSR primers. The number of AF differed according to the implemented molecular marker. The RAPD primers produced 34 AF, while ISSR gave 24 AF. The RAPD and ISSR were effective to determine the BM fingerprint. The quantitative analysis using HPLC stated that the main phenolic components in the ethanol/water extract were Chlorogenic acid and Gallic acid (330.36 µg/g and 309.86 µg/g, respectively). The Quercetin concentration was 42.99 µg/g. While the main flavonoid compound was rutin with a concentration of 506.36µg/g.","PeriodicalId":40934,"journal":{"name":"EGYPTIAN JOURNAL OF VETERINARY SCIENCE","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42427058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-08-01DOI: 10.21608/ejoh.2022.124431.1193
Ahmed A. Aborawash, Hassan El Wakeel, N. Mansour, W. Elhelew, M. Nasser
T HIS study was conducted in two successive seasons 2017 and 2018 on ‘Crimson Seedless’ vines budded on Richter 110 rootstock at four years old, grown in a private orchard at Al Qattah, Giza Governorate, Egypt, to improving fruit quality, especially color. using three Spray machines ( 1- Electrostatic ESS 2- Cima 3- backpack sprayers) and six foliar applications of materials concentration (500ppm Ethephon, 1000ppm Ethephon, 2000ppm Ethephon, 500ppm Abscisic acid, 1000ppm Abscisic acid and 2000ppm Abscisic acid) at veraison. Fruit quality, especially TSS/acid ratio and Anthocyanin content were increased when spraying by ESS followed closely by Cima spray machines. 2000ppm of Abscisic acid gave the significant highest values of Anthocyanin content followed by 1000ppm ABA and 2000ppm Ethephon, while there was no significant differential effect of them on TSS/acid ratio. On the other hand, the firmness decreased when spraying by 2000ppm and 1000ppm from Ethephon and Abscisic acid. Therefore, it can be recommended to get the best color and TSS/acid ratio for berries of Crimson seedless grape should be spraying 1000ppm Abscisic acid or 2000ppm Ethephon at veraison by ESS or Cima spray machines.
{"title":"Improving Fruit Quality of Crimson Seedless by Ethephon and Abscisic Acid Foliar Applications Using Three Machine Types","authors":"Ahmed A. Aborawash, Hassan El Wakeel, N. Mansour, W. Elhelew, M. Nasser","doi":"10.21608/ejoh.2022.124431.1193","DOIUrl":"https://doi.org/10.21608/ejoh.2022.124431.1193","url":null,"abstract":"T HIS study was conducted in two successive seasons 2017 and 2018 on ‘Crimson Seedless’ vines budded on Richter 110 rootstock at four years old, grown in a private orchard at Al Qattah, Giza Governorate, Egypt, to improving fruit quality, especially color. using three Spray machines ( 1- Electrostatic ESS 2- Cima 3- backpack sprayers) and six foliar applications of materials concentration (500ppm Ethephon, 1000ppm Ethephon, 2000ppm Ethephon, 500ppm Abscisic acid, 1000ppm Abscisic acid and 2000ppm Abscisic acid) at veraison. Fruit quality, especially TSS/acid ratio and Anthocyanin content were increased when spraying by ESS followed closely by Cima spray machines. 2000ppm of Abscisic acid gave the significant highest values of Anthocyanin content followed by 1000ppm ABA and 2000ppm Ethephon, while there was no significant differential effect of them on TSS/acid ratio. On the other hand, the firmness decreased when spraying by 2000ppm and 1000ppm from Ethephon and Abscisic acid. Therefore, it can be recommended to get the best color and TSS/acid ratio for berries of Crimson seedless grape should be spraying 1000ppm Abscisic acid or 2000ppm Ethephon at veraison by ESS or Cima spray machines.","PeriodicalId":40934,"journal":{"name":"EGYPTIAN JOURNAL OF VETERINARY SCIENCE","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48831061","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-19DOI: 10.21608/ejoh.2022.134209.1197
Wathiq Hmood, M. Ragab, S. Mousa, A. Metwally
{"title":"Effect of Selenium and Silicon Foliar Applications on the Growth and Yield of Common Bean","authors":"Wathiq Hmood, M. Ragab, S. Mousa, A. Metwally","doi":"10.21608/ejoh.2022.134209.1197","DOIUrl":"https://doi.org/10.21608/ejoh.2022.134209.1197","url":null,"abstract":"","PeriodicalId":40934,"journal":{"name":"EGYPTIAN JOURNAL OF VETERINARY SCIENCE","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46750903","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-01DOI: 10.21608/ejoh.2022.137703.1200
Adel M. Gowda, H. Ali, T. El-Bolok
T HIS study was conducted during the 2018/2019 and 2019/2020 seasons on 12- year- old Picual olive trees grown in a private orchard located 182 kilometers south of Cairo on the Western Desert Road in Minia Governorate, and aimed to investigate the effect of foliar sprays with different potassium sources on growth, leaf mineral composition, yield and fruit quality. Foliar application potassium sources such as; potassium sulfate, potassium nitrate, potassium citrate and monopotassium phosphate were applied at 1.5 % and 3 % . Spraying is carried out three times immediately after the final fruit set (May), after hardening of the pit (first week of August) and after harvesting (October). The results showed that using the studied foliar potassium sources significantly improved vegetative growth, leaf mineral composition, fruit set, yield and fruit quality of Picual olive trees in comparison with control trees. Spraying of potassium nitrate at 3 % achieved the best results in terms of vegetative growth (shoot length - number of new laterals / shoot - number of leaves - leaf area) followed by spraying with potassium citrate at 3% in both seasons. As for leaf mineral content, nitrogen and potassium percentages were increased as a result of foliar application with potassium nitrate at 3 %. Picual olive trees were sprayed with potassium nitrate and potassium citrate at 3 % had the highest values in the flowering characteristics. Yield and fruit quality were significantly affected and the highest values were achieved in Picual olive trees sprayed with potassium nitrate at 3% followed by potassium citrate at 3% in both seasons.
{"title":"Effect of Foliar Spraying with Different Sources of Potassium on Growth, Leaf Mineral Composition, Yield and Fruit quality of Picual Olive Trees.","authors":"Adel M. Gowda, H. Ali, T. El-Bolok","doi":"10.21608/ejoh.2022.137703.1200","DOIUrl":"https://doi.org/10.21608/ejoh.2022.137703.1200","url":null,"abstract":"T HIS study was conducted during the 2018/2019 and 2019/2020 seasons on 12- year- old Picual olive trees grown in a private orchard located 182 kilometers south of Cairo on the Western Desert Road in Minia Governorate, and aimed to investigate the effect of foliar sprays with different potassium sources on growth, leaf mineral composition, yield and fruit quality. Foliar application potassium sources such as; potassium sulfate, potassium nitrate, potassium citrate and monopotassium phosphate were applied at 1.5 % and 3 % . Spraying is carried out three times immediately after the final fruit set (May), after hardening of the pit (first week of August) and after harvesting (October). The results showed that using the studied foliar potassium sources significantly improved vegetative growth, leaf mineral composition, fruit set, yield and fruit quality of Picual olive trees in comparison with control trees. Spraying of potassium nitrate at 3 % achieved the best results in terms of vegetative growth (shoot length - number of new laterals / shoot - number of leaves - leaf area) followed by spraying with potassium citrate at 3% in both seasons. As for leaf mineral content, nitrogen and potassium percentages were increased as a result of foliar application with potassium nitrate at 3 %. Picual olive trees were sprayed with potassium nitrate and potassium citrate at 3 % had the highest values in the flowering characteristics. Yield and fruit quality were significantly affected and the highest values were achieved in Picual olive trees sprayed with potassium nitrate at 3% followed by potassium citrate at 3% in both seasons.","PeriodicalId":40934,"journal":{"name":"EGYPTIAN JOURNAL OF VETERINARY SCIENCE","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43024653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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