The investigation on nitrogen uptake at different growing stages of winter and summer cultivated barley under dryland Central Anatolia conditions using N-15 isotope technique
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Date
2019-06
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Turkish Atomic Energy Authority
Abstract
Orta Anadolu kuru koşullarında kışlık ve yazlık olarak yetiştirilen arpa (Hordeum vulgare) bitkisinin farklı büyüme dönemlerinde, H1: başaklanma, H2: dane dolum ve H3: hasat’a ait verim, N-15 alımları ve gübre kullanma randıman değerlerini belirlemek amacıyla bir tarla denemesi kurulmuştur. Deneme tesadüf blokları deneme desenine göre bölünmüş parseller olarak 4 tekrarlı kurulmuştur. Kışlık arpa Ekim’de ve yazlık arpa Mart’ta, ekim oranı 200.0 kg/ha ve sıra arası 20.0 cm olarak ekilmiştir. Kışlık arpa’ya 40.0 kgN/ha hesabıyla 3.02 % N-15 atom excess ve yazlık arpa’ya 40.0 kgN/ha hesabıyla 2.80 % N-15 atom excess’lik amonyum sülfat gübresi uygulanmıştır. Bitki örnekleri farklı gelişme dönemlerinde hasat edildi ve toplam azot analizleri Kjeldahl metodu ile ve % N-15 atom excess analizleri N-15 emisyon spektrometresi ile yapılmıştır. Elde edilen sonuçlarda kışlık arpanın kuru madde verimleri (dane+sap), N-15 alımı ve N kullanma randımanı değerlerinin yazlık arpa’dan yüksek olduğu görülmüştür. En yüksek N-15 alımı ve N kullanma randımanı değerleri dane dolum döneminde bulunmuştur. Hasat döneminde ortalama azot kullanma randımanı değerleri kışlık ve yazlık arpa için sırasıyla % 66.0 ve % 24.1 bulunmuştur.
In order to determine the yield, N-15 uptake and nitrogen use efficiency values at the different growing stages which were H1: heading, H2: grain filling and H3: harvesting stages of winter and summer cultivated barley (Hordeum vulgare) under dryland Central Anatolia, a field experiment was carried out. Experiments were conducted using randomized block design as split plot for 4 replications. Winter barley was sown in October and summer barley was in March as 200.0 kg/ha sowing rate and 20.0 cm row spacing. For winter barley 40.0 kgN/ha as 3.02 % N-15 atom excess and for summer barley 40.0 kgN/ha as 2.80 % N-15 atom excess ammonium sulphate fertilizer were applied. Plant samples were harvested at different growth stages and total nitrogen using by Kjeldahl method and % N-15 atom excess using by emission spectrometer analyses were done. Obtained results showed that the winter barley had higher dry matter yields (seed+straw), N-15 uptake and N-use efficiency values than summer barley. The highest amount of N-15 uptake and N-use efficiency were found at the grain filling stage. The average of nitrogen use efficiency values were found 66.0 and 24.1 % for winter and summer barley at harvesting stages, respectively.
In order to determine the yield, N-15 uptake and nitrogen use efficiency values at the different growing stages which were H1: heading, H2: grain filling and H3: harvesting stages of winter and summer cultivated barley (Hordeum vulgare) under dryland Central Anatolia, a field experiment was carried out. Experiments were conducted using randomized block design as split plot for 4 replications. Winter barley was sown in October and summer barley was in March as 200.0 kg/ha sowing rate and 20.0 cm row spacing. For winter barley 40.0 kgN/ha as 3.02 % N-15 atom excess and for summer barley 40.0 kgN/ha as 2.80 % N-15 atom excess ammonium sulphate fertilizer were applied. Plant samples were harvested at different growth stages and total nitrogen using by Kjeldahl method and % N-15 atom excess using by emission spectrometer analyses were done. Obtained results showed that the winter barley had higher dry matter yields (seed+straw), N-15 uptake and N-use efficiency values than summer barley. The highest amount of N-15 uptake and N-use efficiency were found at the grain filling stage. The average of nitrogen use efficiency values were found 66.0 and 24.1 % for winter and summer barley at harvesting stages, respectively.
Description
Keywords
N-15 isotope technique, N-15 izotop tekniği, Nitrogen use efficiency, Azot kullanma randımanı, Different growing stages, Farklı gelişme dönemleri, Barley, Arpa
Citation
Akın, Ali İ. (2019). The investigation on nitrogen uptake at different growing stages of winter and summer cultivated barley under dryland Central Anatolia conditions using N-15 isotope technique. Turkish Journal of Nuclear Sciences, 31(1), 1-13.