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Accueil du site → Doctorat → Turquie → DETERMINATION OF YIELD, NITROGEN USE EFFICIENCY AND QUALITY OF SOME BARLEY CULTIVARS IN RESPONSE TO NITROGEN FERTILIZATION AMOUNTS UNDER THE CENTRAL ANATOLIAN CONDITIONS

Ankara University (2019)

DETERMINATION OF YIELD, NITROGEN USE EFFICIENCY AND QUALITY OF SOME BARLEY CULTIVARS IN RESPONSE TO NITROGEN FERTILIZATION AMOUNTS UNDER THE CENTRAL ANATOLIAN CONDITIONS

KON Halil İbrahim Fırat

Titre : DETERMINATION OF YIELD, NITROGEN USE EFFICIENCY AND QUALITY OF SOME BARLEY CULTIVARS IN RESPONSE TO NITROGEN FERTILIZATION AMOUNTS UNDER THE CENTRAL ANATOLIAN CONDITIONS

ORTA ANADOLU KOŞULLARINDA, BAZI ARPA ÇEŞİTLERİNİN VERİM, KALİTE VE AZOT KULLANIM RANDIMANLARININ AZOTLU GÜBRELEME MİKTARLARINA GÖRE BELİRLENMESİ

Auteur : KON Halil İbrahim Fırat

Université de soutenance : Ankara University

Grade : DOKTORA TEZİ 2019

Résumé
Barley is an important cereal cultivated worldwide and mainly used as animal feed and also for malt production. This research is conducted to determine the effects of different doses of nitrogen fertilizers which is likely to increase the quality and quantity of barley cultivars under the Central Anatolian’ climate conditions. The experiment was laid out as a Randomised Complete Block Design (RCBD) with factorial combitantions and replicated three times in the experimental site of Ankara Central Research Institute for Field Crops. Different nitrogen fertiliser doses were applied on sub-plots with the amount of 0, 3, 6, 9 and 12 kg/da and barley cultivars Akar, Burakbey, Yalın and Özen were placed in main-plots. According to the results ; as the nitrogen doses increased, the plant height, the number of spike per unit area, the biological yield, the grain yield, the protein content in grain, nitrogen content in the grain and straw increased, while the harvest index decreased. In addition, the increase in nitrogen ratio did not change the beta-glucan content, grain size, hectoliter weight and thousand grain weight, however, significant differences were found among barley cultivars in terms of the other listed parameters. Nitrogen utilization efficiency’ parameters showed statistically significant differences among cultivars. It was determined that NUE decreased in parallel with the rise in nitrogen doses. It was found out that 6 to 9 kg/da nitrogen fertilizer use can be recommended for winter the barley cultivars Akar and Yalın namely, for grain yield purposes. It was detected that it is appropriate to consider Özen as a kind of spring hulles barley which needs irrigation in the arid areas such as Central Anatolia. In terms of biological yield, it was seen that 9 kg/da nitrogen dose for winter cultivars (Akar, Burakbey and Yalın) would be more economical. The higher amount of nitrogen fertilizers does not result in a significant increase except the protein and nitrogen content in the quality parameters. Therefore, excessive use of fertilizers are expected to increase the negative impact on the cost as well as on environment.

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