Response of Zaghloul Date Palms Grown in New Reclaimed Lands to Application of Organic and Bio Nitrogen Fertilizers

Document Type : Original Article

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Horticulture Research Institute, Agric. Res. Center, Giza, Egypt.

Abstract

The present study was carried out during three seasons i.e. 2008, 2009 and 2010 on Zaghloul date palms grown in sand silty soil under surface irrigation in new reclaimed land in Mariot sector. The aim of this study was to investigate response of Zaghloul date palms to application of organic and bio nitrogen fertilizers along with mineral N and their combinations (11 treatments). The obtained results indicated that, all studied treatments of mineral, organic and bio nitrogen combinations were effective in improving yield, fruit quality and leaf mineral content compared with those of the control treatment (unfertilized) and 100% mineral nitrogen treatment. It was abvious that, the superior treatment which exerts positive effects on yield/palm, fruit and pulp weight, flesh thickness, TSS%, total and reducing sugars and leaf NPK content was treatment no.10 (25% Min. N + 50% Org. N + Bio. N) followed descendingly with treatment no.3 (50% Min. N + 50% Org. N). In the meantime, both of treatment no.6 (100% Org. N + Bio. N) followed descendingly by treatment no. 10 (above mentioned) were the most effective in inhancing fruit dimensions and leaf Fe, Mn, Zn content.
It could be concluded that, under the conditions of this study, 25% mineral nitrogen + 50% organic nitrogen + Bio nitrogen treatment was very superior one for minimizing the use of mineral nitrogen fertilization to the quarter, reducing environmental pollution and producing an economical yield with best fruit quality of Zaghloul date palms in new reclaimed lands.  

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