BULETIN USAMV-CN, 62/2006(258-263) ISSN 1454-2382 INVESTIGATION OF WHEAT QUALITY ON DIFFERENT SAMPLES Gyıri Z., P. Sipos Department of Food Science and Quality Assurance, Faculty of Agronomy, Centre of Agricultural Sciences, University of Debrecen, 138. Böszörményi Street, Debrecen, Hungary Tel/Fax: 36-52-417-572; gyori@agr.unideb.hu Key words: winter wheat, quality, fertilizer response, reology Abstract. The technology quality parameters of winter wheat were analysed on the results of a variety and cropping site experiment and a variety and mineral fertilizer field plot experiment. Results proves that the examined quality parameters suit the requirements of the intervention standard of European Union and international requirements for bread flour at average, but to reach safely the so called milling quality by the Hungarian Standard required higher input, especially mineral fertilizer supply. Results also show that the performance of newly bred and registered varieties is better in numerous parameters in common conditions. Results clearly show that the response of varieties to increasing mineral fertilizer doses is advantageous, and an adequate nutrient supply is guided by the requirements of selected varieties makes the results of quality more secure and the production more economical INTRODUCTION There are several qualification methods to determine the quality of winter wheat, similarly to the varied demands of consumers (Kent, 1990). The quality parameters could be grouped as physical properties (hectolitre weight, one thousand kernels weight, grain hardness, moisture content), protein-linked properties (protein and gluten content, gluten index and expansiveness, sedimentation volume, protein and amino acid composition), rheologic properties (Farinograph or valorigraph test, Alveograph values, Extensograph test), enzymatic properties (Hagberg falling number, amylograph) and other examinations (ash content, test baking, micotoxin content and residues of pesticides and insecticides, e.g.). Beside inland consumption there is a significant wheat yield amount for export in Hungary, therefore it is important that our quality tests are known and accepted in several countries, and we also have to know the quality capacities of our varieties by different, rarely known methods. On the other hand, it is important to apply generally known, many times simple methods in production because of the quality based trading. The different varieties could be classified to different processing aims by breeders and analytic laboratories. On the base of their results the farmers can choose varieties for plant production, but they also have to know the effect of different external factors (mineral fertilization, plant protection) on both yield and quality. To get this knowledge there are several scientific publications (Haneklaus and Schnug, 1992; Ragasits et al., 2000; Triboi et al., 2000; Pepó, 2002; Dachler and Kochl, 2003; Tanács et al., 2004; Szentpétery et al., 2004), what examine the quality variety specific way. The Central Laboratory of Centre of Agricultural Sciences, University of Debrecen posses several equipments to examine the wheat and flour quality by several ways, and as it is a laboratory of the University and brought to you by CORE View metadata, citation and similar papers at core.ac.uk