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Effect of Different Levels of Nitrogen Fertilizer on the Grain Yield and its Components for Eight Varieties of Bread Wheat (Triticum aestivum L.). | ||
| Journal of Tikrit University For Agriculture Sciences | ||
| Article 1, Volume 18, Issue 1, 2018, Pages 14-27 | ||
| Authors | ||
| Hussein K. A. Al-azawi; Muhsin A. Ahmed Al-Janabi; Fakher- aldian A. Sedeeq | ||
| Abstract | ||
| A field study was carried out in the Diyala governorate about 50 km north of Baghdad during seasons 2014-2015 and 2015-2016 according to the design (RCBD) of factorial experiment in three replicates to study the effect of different levels of nitrogen fertilization (zero - 80 -160-240) kgN.ha-1 as urea (46%N) on grain yield and it's components for eight varieties of wheat, (Triticum aestivum L.) which are (Ibba-99, Tamuz-2, Rashed, Latifah, Abu-Ghraib, Bengal, Sham-6 and Sagittario). Nitrogen was added in three equal amounts for each level. The results showed that grain yield and its components (spike length - number of spikes – spikelet numbers.spike-1 - number of grains.spike-1 and thousand grain weight) were significantly affected (p<0.01) by increase nitrogen levels. The highest number of spike (344.67 and 362.67) was achieved with treatment of 240 kgN.ha-1, while the highest grain yield was obtained with 160 kgN.ha-1 about (550 and 559.31) g.m-2 for both season. Also varieties showed a significant difference in grain yield and its components. The highest amount of grain yield was obtained with varieties Rashed and Sagittario (502.24 and 525.31) g.m-2 in the first season and with Rashed and Sham-6 (565.88 and 554.81) g.m-2 in second season. The interaction between varieties and nitrogen fertilization also showed a significant difference affected all the traits. | ||
| Keywords | ||
| Bread Wheat; nitrogen; cultivars; Yields | ||
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