Comparison of soil organic matter accumulations under various soil management systems in vetch-wheat versus wheat-wheat rotaions in Central Anatolia using nuclear techniques
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Date
2006
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Azerbaijan National Academy of Sciences Institute of Radiation Problems ve Turkish Atomic Energy Authority
Abstract
With this research work the quantitative estimation of soil organic matter dynamics, water and nitrogen use efficiencies in wheat-wheat and vetch-wheat (where vetch is green manured at 10 % flowering stage) rotation systems will be compared by using 13C and 15N techniques. Specific objectives of this research work includes a) to find out the water and nitrogen use by wheat in vetch-wheat rotation, thus to find out the soil moisture conservation , b) to find out the influence of the soil organic matter by green manuring of vetch, c) to trace the quantitative soil carbon change in vetch-wheat rotation in the long run d) to find out the effects of different irrigation and N fertilization rates to wheat yields, water and nitrogen use efficiencies by using neutron probe water balance method and 15N techniques, respectively, d) to find out the N2-fixation (using isotope dilution method) of vetch in vetch-wheat rotation.
Significantly higher grain and stover wheat yields were obtained in the first year when irrigation was done and the N rate was increased. Nitrogen use efficiency of wheat increased with irrigation. Also, the N2- fixation of vetch at 10 % flowering (just before plowing down into the soil) in vetch-wheat rotation had been quantified by using wheat as reference crop. As expected with higher N rates and no irrigation less N2- fixation was obtained. Soil 13C analysis were done by IAEA Seibersdorf laboratoiy on the soil samples taken from different depths.of all treatments for the first year experiments.
In the begining of the second year (October 2005) wheat was the only crop sown in both rotations. Soil moisture readings, were done every month and are still continuing. The harvest of wheat will be relaized in July 2006. Then we will have the wheat dry matter yields (both grain and stover), also the total nitrogen and 15N analysis will be done on the wheat plant samples that will be taken at harvest, and thus we will have the second year data on nitrogen and water use of wheat. Also, soil samples will be collected from different depths for 13C analysis. After all the data for the second year are obtained and analyzed the conclusions drawn will be reported.
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Keywords
Central Anatolia, İç Anadolu, Comparison of soil organic matter accumulations, Toprak organik madde birikimlerinin karşılaştırılması, Wheat-wheat rotaions, Buğday-buğday rotasyonu, Soil management systems, Toprak yönetim sistemleri, Use of nuclear techniques, Nükleer tekniklerin kullanımı, Vetch-wheat, Fiğ-buğday
Citation
Halitligil, M. B. ve Kışlal, H. (2006). Comparison of soil organic matter accumulations under various soil management systems in vetch-wheat versus wheat-wheat rotaions in Central Anatolia using nuclear techniques. The Fourth Eurasian Conference on Nuclear Science and Its Application : Presentations, (s. 502-510). 31 October-3 November 2006. Baku, Azerbaijan.