The response of two naked barley varieties (Hordeum vulgare L.) to four phosphorus fertilizer levels
Journal Title: Journal of Agricultural and Crop Research - Year 2017, Vol 5, Issue 2
Abstract
The objective of this study was to determine the effect of phosphate fertilization on the biological and grain yield and to identify the optimum dose generating the best performance of these two varieties, which had extraordinary β-glucan content in previous study. Four rates of P (0, 50, 100, 150 and 200 kg of P2O5/ha) were applied at sowing date and two trials were carried out: the first was done in pots to exhibit the effect of (P) on plantlet root growth while the second was conducted in the field in a completely random design with three replications. In the last case, all elementary plots were fertilized with 25 kg/ha of ammonium nitrate at the elongation stage. The gradual increase in P-fertilization positively affects root growth of the first trial. It affects also biological and grain product of both varieties in the second trial in the field, up to 100 kg/ha. However, both varieties exhibited contrasting behaviour. The first variety «Tombari» showed a significant increase in the number of grains/spike and spike weight; while the second one «Giza 130» produced significantly more fertile tillers/m2 and more grain/spike according to P-fertilizer increase. Therefore, phosphate fertilization contributes to barley growth and yield up until 100kg/ha in a genotype-independent manner, which responded in different way. Beyond this dose, «Tombari» reacted negatively to the phosphate increase, while «Giza 130» exhibited an unaffected behaviour.
Authors and Affiliations
Amani Naceur, Hatem Cheikh-M’hamed, Jaime da Silva, Chedly Abdelly, M’barek Naceur
Keywords
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