Al-Hussein S.A. Hamad and Maha M. Othman( 2021). Reducing Mineral Nitrogen Partially Using Different Sources of Organic and Bio-Fertilization and Its Effect on Fruiting In Keitte Mango Trees under Sandy Soil ConditionsResearcher 2021;13(4)
Abstract: This study was carried out during 2018, 2019 and 2020 seasons, a private mango orchard located at Kom Ombo district, Aswan Governorate, Egypt. An attempt to reduce mineral nitrogen fertilizers partially in Keitte mango trees orchards under sandy soil conditions by application of organic (filter mud and chicken manure) and biofertilizer (Minia Azotene) Mineral, Organic and biofertilizers were applied at various proportions. Obtained results indicated that supplying Keitte mango trees with N inorganic source 70% and organic and biofertilizers at 30% was very effective in improving all growth characters, percentages of initials fruit setting and fruit retention and yield/ tree compared with using N completely in inorganic from and 40% inorganic plus 60% organic and biofertilization. A gradual increase in leaf chemical composition as well as physical and chemical fruits reducing the percentages of inorganic N from 100 to 40% and at the same time increasing the percentages of organic and biofertilizers from 30% to 60% caused a gradual increase in the fruits quality increasing in fruit weight, total soluble solids, total sugars and vitamin C and decreasing percentage seed weight, fruit peel and total acidity. The used of organic fertilization source of chicken manure was better than the filter mud. However , to improve Keitte mango trees yield quantitively and qualitatively it is advisable to supply the trees with the suitable N ( 1000 g / tree / year) as 40% inorganic (ammonium nitrate) + 20% organic (filter mud)+ 20% organic (chicken manure) + 20% biofertilization (Minia Azotene) for producing organic fruits. [Al-Hussein S.A. Hamad and Maha M. Othman Reducing Mineral Nitrogen Partially Using Different Sources of Organic and Bio-Fertilization and Its Effect on Fruiting In Keitte Mango Trees under Sandy Soil Conditions
2021;13(4):22-30]. ISSN 1553-9865 (print); ISSN 2163-8950 (online).http://www.sciencepub.net/researcher. 3. doi:10.7537/marsrsj130421.03.
Keywords: (Reducing; Mineral; Nitrogen; Partially; Source; Organic; Bio-Fertilization; Effect; Fruiting; Keitte; Mango; Tree; Sandy; Soil; Condition .)
