Abstract:
This study was conducted to determine different nitrogen levels affect on nitrogen recovery efficiency, NRE, by use of
drip irrigation under partial root zone drying irrigation and fertigation techniques for sugar beet plant. Research was
performed in 2012 and 2013 at Konya - Çumra Plain of Turkey and Stine sugar beet cultivar was used. In study,
application of 100% irrigation water requirement of plant, FI (Full Irrigation) and 50% application of FI by using fixed
(FPRD50) and alternative partial root drying (APRD50) irrigation techniques, and application of 100% nitrogen
requirement of sugar beet, FN (Full Nitrogen) with two deficit nitrogen treatments of 75% (DN75) and 50% (DN50) of
FN levels were applied by drip irrigation. Different deficit nitrogen applications affect on crop nitrogen use was
researched comparatively under different irrigation techniques and fertigation method. The results showed that among
the irrigation treatments, differences in NRE from nitrogen fertilizer were found not significant. DN50 was found the
highest NRE of crop from nitrogen fertilizer. The greatest performances combinations in NRE of crop from fertilizer
nitrogen were, FIDN50 as 52.6%, APRD50DN50 as 48.5% and FPRD50DN50 as 41.0% interactions. Those results
showed that nitrogen requirement of crop can be reduced for drip irrigated sugar beet farming.
