Awad,, H. (2000). EFFECT OF NUMBER OF IRRIGATIONS AND NITROGEN. Journal of Soil Sciences and Agricultural Engineering, 25(7), 4717-4726. doi: 10.21608/jssae.2000.259446
H. A. Awad,. "EFFECT OF NUMBER OF IRRIGATIONS AND NITROGEN". Journal of Soil Sciences and Agricultural Engineering, 25, 7, 2000, 4717-4726. doi: 10.21608/jssae.2000.259446
Awad,, H. (2000). 'EFFECT OF NUMBER OF IRRIGATIONS AND NITROGEN', Journal of Soil Sciences and Agricultural Engineering, 25(7), pp. 4717-4726. doi: 10.21608/jssae.2000.259446
Awad,, H. EFFECT OF NUMBER OF IRRIGATIONS AND NITROGEN. Journal of Soil Sciences and Agricultural Engineering, 2000; 25(7): 4717-4726. doi: 10.21608/jssae.2000.259446
Water Requirement and Field Irrigation Dept., Soil Water and Environ . Res. Inst., ARC EGYPT
Abstract
Field experiments were conducted at EL – Serw Agricultural Research Station (North Delta) in the two growing seasons 1997-1998 and 1998 –1999,to study the effect of number of irrigations and nitrogen rates on and the Canola yield,its components , water consumptive use, water use efficiency , and crop coefficient. Pactol cultivar was used in this experiment .
A split –plot design with four replications was used . Four irrigation treatments (I1 = five irrigations, I2=four irrigations ,I3= three irrigations and I4 =two irrigations ) in the main plots and four N-fertilizer levels (N1= 75kg N/fed , N2 =50 kg N/fed, N3 =25kg N/fed and N4 = zero kg N /fed )in the sub – plots were tested . Results indicated that there was significant effect for the treatments on Canola seed yield and its yield components . Seed yields for I2,I3 and I4 (four ,three and two irrigations) , respectively were 15 .9% ,27 % and 41% less than the yield of I1 (five irrigations )respectively . For the N– level of 75 . N kg /fed, seed yield was 14.6% , 51.2% and 65% more than the yield of N2, N3 and N4, respectively . The results showed also that there was a high significant effect for the treatments on yield components . Water consumptive use values were 34. 65 cm, 28.7cm , 20.6cm and 16.8 cm for irrigation treatment I1 ,I2, I3 and I4 respectively . Their values were 31.1 , 27.6 , 22.9 and 19.05 cm for N-rates 75, 50 ,25 and zero ( kg N/fed ), respectively . Water use efficiency for I1=five irrigations was 27.5 kg seed /cm water and the value was 39.3 kg/cm for 75 kg N/fed . Crop coefficient for Canola crop at North Delta area is 0.89 .
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