EFFECT OF NITROGEN, PHOSPHORUS AND ZINC FERTILIZATION ON YIELD, QUALITY AND NUTRIENTS UPTAKE OF BERSEEM-BARLEY MIXTURE

Document Type : Research articles.

Authors

Soil, Water and Environment Res. Inst., A.R. C, Egypt

Abstract

Two field experiments were conducted in clay soil at the Agricultural
Farm of Sids Agricultural Research Station, Agricultural Research
Center during two seasons 2010/2011 and 2011/2012, consecutively to
investigate the effect of three nitrogen levels (0, 15 and 30 kg N/fed),
three phosphorus levels, i.e. 6.8, 9.6 and 13.1 kg P/fed and two zinc
application levels (0.0, and 10 kg zinc sulphate/fed) on total fresh and
dry forage yield, forage quality; namely, N, protein, P and Zn
concentration and N, P and Zn uptake by berseem-barley mixture.
Total fresh and dry forage yield significantly increased by N, P and
Zn fertilization. Nitrogen and protein percentage positively affected only
by nitrogen fertilization. While, phosphorus concentration significantly
affected by raising phosphorus levels only. Meanwhile, zinc
concentration increased by zinc application and decreased by increasing
phosphorus levels. Nitrogen, phosphorus and zinc fertilization increased
nitrogen uptake. Whereas, phosphorus or zinc uptake responded only to
phosphorus or zinc application, respectively. All studied parameters
affected by the interaction between phosphorus and zinc, where added
phosphorus at higher rate inhibited the effectiveness of zinc.

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