Response of flax plant to foliar spray by urea and some of micronutrients mixture under different nitrogen levels

الملخص EN

Two field trial were conducted at Sakha Agricultural Research Station, Kafr El-Sheikh Governorate, Egypt, during 2016/2017 and 2017/2018 winter seasons to study the physiological response of flax (Linum usitatissimum L.) Sakha 3, cultivar to three nitrogen fertilizer rates i.e; 25, 35 and 45 kg N/fad..

in a combination with foliar spray by urea 2(%) plus some of micronutrients mixture of (Fe + Zn + Mn) using concentration at 200 ppm for each element.

The maximum values of plant height, fruiting zone length, technical length, as well as, leaf area/plant and dry matter accumulation (g)/m2 at 80 and 95 days after sowing (DAS), crop growth rate (CGR) and net assimilation rate (NAR) at (80–95 DAS) period were obtained when plants received 35 kg N/fad.

and foliar spray with urea 2(%)plus 200 ppm micronutrients mixture of (Fe + Zn + Mn).

In addition, straw and seed yields, its components, fiber (%), fiber yield, total chlorophyll of leaves at 95 DAS, oil (%) and oil yield.

The total saturated fatty acids of flax oil were, gradually, increased with increasing nitrogen fertilizer rate from 25 up to 45 kg N/fad., whereas, the total unsaturated fatty acids were decreased.

The minimum value of the total unsaturated fatty acids were obtained from plants received [35 kg N/fad.

and a spray with 200 ppm micronutrients mixture of (Fe+ Zn +Mn)]