|Author:||Daneshvar, M. ; Sarvestani, Z. T. ; Sanavy, S. A. M. M.|
|Book Group Author:||NA|
Field studies were conducted in Iran, in 2005 and 2006, to investigate the effect of irrigation and nitrogen (N) fertilizer on the agronomic and physiological traits of 2 winter rape cultivars (Zarfam and SLM046). The treatments comprised 4 irrigation levels (I60, I90, I120 and I150) and 4 N levels (N0, N70, N140 and N210 kg N/ha). Thousand-seed weight (TSW) in all irrigation and N levels was lower in the 2006 than that of the 2005. Seed oil percentage (SOP) decreased with increasing water use only in the second year. As N rate increased, SOP decreased and seed oil yield (SOY) increased significantly in 2006. With increasing water supply, SOY increased in the first year. Zarfam had a higher TSW and SOP in both years. According to combined analysis results, seed and oil yield were not significantly affected by irrigation treatments and rape cultivars. Seed yield had no significant difference between the 70 and 210 kg N/ha treatments. Both water use efficiency (WUE) and dry matter remobilization efficiency (DMRE) were increased by decreasing water supply in the I90 to I150 treatments. But N0 and N210 resulted in the lowest WUE and DMRE, respectively. Considering all traits, the first year of experiment was better than second year. The irrigation × variety interaction had a significant effect on seed yield and WUE. Generally, I150N70V1 combination is recommended in the region of the study due to high performance in production of seed and oil yield.
|Pages:||1530 - 1540|
|Journal:||Pakistan Journal of Biological Sciences|
application rates, crop yield, cultivars, irrigation,nitrogen fertilizers, plant water relations, rape, seed weight, seeds,swede rape, water use efficiency, yield components, Iran, Brassica napusvar. oleifera, Brassica napus, Brassica, Brassicaceae, Capparidales,dicotyledons, angiosperms, Spermatophyta, plants, eukaryotes, West Asia,Asia, Middle East, Developing Countries, Threshold Countries, canola,Capparales, cultivated varieties, oilseed rape, watering, Field Crops(FF005) (New March 2000), Plant Breeding and Genetics (FF020), PlantWater Relations (FF062), Plant Production (FF100), Fertilizers and otherAmendments (JJ700), Soil Water Management (Irrigation and Drainage)(JJ800) (Revised June 2002) [formerly Soil Water Management]