{"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}
{"title":"Response of Samany Date Palm to Different Methods and Times of Fruit Thinning Under Assiut Conditions","authors":"A. Ahmed","doi":"10.21608/ejoh.2022.120989.1190","DOIUrl":"https://doi.org/10.21608/ejoh.2022.120989.1190","url":null,"abstract":"T HIS experiment was conducted during 2020 and 2021 on Samany date palms grown in new reclaimed sandy soil at private orchard located at Al Assiuty valley, Assuit, Egypt, to improve yield and some physical and chemical fruit quality by strand thinning (shortening 25% of length of all strands from the terminal tips at pollination and one month after pollination or removing 25% of total strands from the center of the bunch at pollination and one month after pollination. These results indicated that the control gave the highest bunch and total yield than the other treatments but all thinning treatments increased most of physical properties; fruit weight, flesh weight, fruit length, and diameter and thickness . Also improved the chemical properties such as TSS, total sugars, and reducing sugars. Strand thinning by removal 25% of the total number of strands at month after pollination gave the highest physical and chemical properties.","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":"45868445","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}
{"title":"Effect of Shoots and Clusters Density on Microclimatic Changes, Yield, and Fruit Quality of King Ruby Grapevines","authors":"M. El-kenawy","doi":"10.21608/ejoh.2022.137167.1198","DOIUrl":"https://doi.org/10.21608/ejoh.2022.137167.1198","url":null,"abstract":"T HE fruit quality of grapevines is a great importance for local consumption and export. Shoots and clusters thinning are substantial agricultural practices in grapevines to improve the berries quality. Herein, 10-years-old King Ruby grapevines were examined in two successive seasons. Four different levels of shoots number were applied (48, 42, 36, and 30, shoots/vine) with two different levels of clusters (30 and 24 clusters per vine). Results showed that the gradual decrease of shoots and clusters/vine improved vegetative growth parameters (shoot length and leaf surface area), total chlorophyll content, and microclimatic characteristics (light intensity, air temperature, and relative humidity); however, decreased yield/vine was observed. Consequently, enhanced chemical properties of berries (SSC, SSC/acid ratio total sugars, total anthocyanins, and total phenols) were obtained. In addition, an improved coefficient of wood ripening and total carbohydrates in canes was recorded. Moreover, the progressive increase in the number of shoots/vines in parallel with the decreased number of clusters/vine raised the cluster weight, cluster length, width, berry weight, length, and width. The thinning application of 30 shoots + 24 clusters per vine collectively achieved the significant highest values of vegetative growth, microclimatic parameters and berries quality, therefore, it could be recommended for application in King ruby vineyards under the Egyptian climatic.","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":"45476991","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}