The Interaction of N Sources and Drought Stress at Flowering Stage of Maize on N and P Uptake and Efficiency

آب و خاک

Article 14, Volume 26, Issue 5, November 2012, Pages 1190-1199   

Document Type: Research Article

DOI: 10.22067/jsw.v1391i0.17047

Authors

S. Fallah; Fayez Raiesi

Abstract

The effects of organic and inorganic N sources on nutrient (N and P) efficiency under the water-stressed conditions have not yet been determined. Thus, a field study was conducted to determine the influence of N from different sources along with drought stress on nutrient efficiencies of maize. Main plots consisted of two irrigation treatments (i.e., optimum irrigation and cut-off irrigation at silking stage for two weeks), and subplots comprised N fertilizers (cattle manure: 40.8 Mg ha-1, poultry manure: 13.3 Mg ha-1, urea fertilizer: 435 kg ha-1, cattle manure + urea fertilizer: 20.4 Mg ha-1and 20.4 Mg ha-1, respectively) and control (without fertilizer). Results indicated that the imposition of water deficit and fertilizer type had a significant effect on N uptake while P uptake was significantly affected only by fertilizer type. The highest N and P uptake were obtained with poultry manure. Similarly, significant differences in N and P use efficiency and N physiological efficiency were observed between the water deficit and fertilizer type (P

Keywords

Efficiency; Fertilizer; Irrigation; Maize