Response of mango trees to organic and bio fertilizers in North Sinai

الملخص EN

This study was carried out during the two successive seasons of 2017 and 2018 on Sukkary mango trees budded on Sukkary rootstock, grown in sandy soil under drip irrigation system at Baloza district, North Sinai Governorate, Egypt.

The aim of this study was to investigate the influence of using chicken manure or chicken manure tea as organic fertilizers combined with/without some bio fertilizes; mycorrhizae(Glomus macrocarbium), Azotobacter chroococcum and Bacillus circulans on improving yield and fruit quality characters of mango fruits (Sukari cv.).

The chosen trees have been subjected to eleven treatments.

The Chicken manure was added at 25 kg/tree in winter.

While, chicken manure teawas added at 30 L/tree/season (divided into three equal doses; the first was added at growth start season and once every two months after the first)and also the bio fertilizes were applied three times parallel with the time of chicken manure tea treatments application.

The obtained results indicated that chicken manure tea + mycorrhizae + A.

chroococcum + B.

circulans treatment increased leaf area, chlorophyll and nitrogen contents, fruit set, weight and number, total yield and vitamin C content and decreased fruit drop.

Furthermore, chicken manure tea + A.

chroococcum treatment increased leaf phosphorus and potassium content, fruit length, diameter, total soluble solids, total sugar and decreased fruit acidity.

Application of bio fertilization treatments with chicken manuretea; chicken manure tea + mycorrhizae + A.

chroococcum+ B.

circulans showed a positive effect on microbial determinations (total microbial counts, Azotobacter densities and Bacillus counts in the rhizosphere region of mango tree).

On the other hand, the colonization percentage of mycorrhizae and number of spores/g soil attained higher values from using chicken manure fertilizers + mycorrhizae + A.

chroococcum+ B.

circulansas compared to control.

Also, this treatment showed an effective role in improving soil fertility via increasing NPK content, decreasing EC and a slight significant difference in pH values.