Nihal Kayan, Nazife Gözde Ayter Arpacioglu, İmren Kutlu, Mehmet Sait Adak

Nohutta Farklı Toprak İşleme Sistemleri ve Bakiye Azota Bağlı Azot Kullanım Etkinliğinin Karşılaştırılması

Farklı toprak işleme yöntemleri ve bakiye azotun nohutun verim ve azot kullanım etkinliğine etkisini araştırmak bu çalışmanın temel amacıdır. Araştırma iki yıl süre ile (2012/2013-2014/2015) Eskişehir Osmangazi Üniversitesi Ziraat Fakültesi deneme alanlarında yürütülmüştür. Denemeler bölünen bölünmüş deneme desenine göre üç tekerrürlü olarak kurulmuştur. Ana parsellerde geleneksel ve azaltılmış toprak işleme metodları bulunmaktadır. Buğday-buğday, buğday-nadas ve buğday-nohut ekim nöbeti sistemleri alt parsellere yerleştirilmiş ve dört azot dozu (0, 50, 100, 150 kg ha-1 ) alt-alt parseller olarak değerlendirilmiştir. Bitkide protein oranı, bitkide azot oranı ve NUtE azaltılmış işlenen topraklarda daha yüksek iken, NUE ve NUpE geleneksel işlenen topraklarda daha yüksek olmuştur. Artan azot dozları bitkide protein oranı ve bitkide azot oranını beklendiği şekilde etkilememiştir. Artan azot dozları NUE ve NUpE azaltırken, NUtE artırmıştır. Tane verimi hariç incelenen tüm özelliklerde yıllar arasındaki farklılıklar önemli çıkmıştır.

Comparisons Nitrogen Use Efficiency in Chickpea under Different Tillage Systems and Soil Residual Nitrogen

The main objective of this study was to investigate the effects of different tillage methods and soilresidual nitrogen on chickpea nitrogen use efficiency and yield. This research was conducted with two years(2012/2013-2014/2015) period at research field of Faculty of Agriculture, Eskisehir Osmangazi University,Eskisehir, Turkey. The experiment was designed in randomized complete block design as split split plot withthree replicates. Main plots were composed to conventional (CT) and reduced tillage (RT). Wheat-wheat (WW);wheat-fallow (WF); wheat-chickpea (WC) crop rotations were placed in sub plots, and four nitrogen doses (0,50, 100, 150 kg ha-1) were evaluated as sub-sub plots. Plant protein ratio, plant N ratio and nitrogen utilizationefficiency (NUtE) were higher RT than CT, however nitrogen use efficiency (NUE) and nitrogen uptakeefficiency (NUpE) were higher CT than RT. Increasing nitrogen doses were not affected the plant protein ratioand plant N ratio as expected. NUE and NUpE decreased by increasing nitrogen doses but NUtE increased. Allof the traits except for seed yield were significantly affected by years.

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