Using Some Organic Manures and Effective Microorganisms as a Partial Replacement of Mineral N Fertilizer in Sukkary Mango Orchards

摘要

This study was carried out during 2013 and 2014 seasons to examine the effect of using three organic manures namely plant compost (2%N), filter mud (2%N) and chicken manure (2.5%) applied at 50 to 75% of the suitable N (1000 g N/tree/year) with or without Effective microorganisms at 50 to 100 ml/tree/year as an attempt for reducing inorganic N partially in Sukkary mango orchards under Aswan conditions. Supplying the trees with N via 50% inorganic plus 50% any organic manures with or without biofertilization with EM had a striking effect on all growth characters leaf pigments, nutrients, yield and fruit quality comparing with using N as 100% inorganic N or when inorganic N was applied at 25% of N even with the application of organic and biofertilization. The best organic manures in this connection was chicken manure followed by filter mud and compost. Organic fertilization enriched with EM was materially superior than using organic fertilization alone. A great decline on the yield was observed with N was applied as 25% inorganic N + 75% plant compost. The best results with regard to yield and fruit quality of Sukkary mango trees grown under Aswan conditions were obtained due to supplying the trees with N (1000g N/tree) through 50% inorganic N + 50% chicken manure enriched with Effective microorganisms at 50 ml/tree/year.