|Author:||Al-Barrak, K. M.|
|Book Group Author:||NA|
A field experiment was conducted to determine the effect of irrigation intervals and nitrogen levels on rape cv. Fido on a sandy loam soil during 2000/01 and 2001/02 seasons in Al-Hassa, Saudi Arabia. Irrigation intervals had significant effects on growth characters as well as seed and oil yields/ha, but it did not induce marked effect on seed oil percentage. The highest values of plant height, stem diameter, number of pods/plant, number of seeds/pod, seed weight/plant as well as seed and oil yields/ha were produced with irrigation every 7 or 14 days. Nitrogen rates had significant effects on all estimated characters, except the harvest index and seed oil percentage. The highest nitrogen rates (120-180 kg N/ha) were associated with an increase in all estimated characters, except seed oil percentage, which took the reverse trend. The interaction between irrigation intervals and nitrogen rates had significant effects on seed and oil yields/ha. Irrigation of rape every 7 or 14 days and applying nitrogen fertilizer at 120-180 kg N/ha produced the highest seed and oil yields/ha. The optimum water use efficiency was obtained with the irrigation every 14 days, particularly with the addition of 180 kg N/ha. In general, it can be concluded that irrigation of rape plants at a regular interval of 14 days with 650 m3 water/irrigation/ha and adding nitrogen fertilizer with the rate of 120-180 kg N/ha produced the highest seed and oil yield/ha and increase the water use efficiency under the environmental condition of Al-Hassa region.
|Pages:||87 - 103|
|Journal:||Scientific Journal of King Faisal University (Basic andApplied Sciences)|
application rates, crop yield, growth, irrigation,irrigation scheduling, nitrogen fertilizers, plant water relations,pods, rape, seed weight, seeds, swede rape, water use efficiency, yieldcomponents, Saudi Arabia, Brassica napus var. oleifera, Brassica napus,Brassica, Brassicaceae, Capparidales, dicotyledons, angiosperms,Spermatophyta, plants, eukaryotes, West Asia, Asia, Middle East,Developing Countries, canola, Capparales, oilseed rape, watering, FieldCrops (FF005) (New March 2000), Plant Water Relations (FF062), PlantProduction (FF100), Fertilizers and other Amendments (JJ700), Soil WaterManagement (Irrigation and Drainage) (JJ800) (Revised June 2002)[formerly Soil Water Management]