Thomsen, I.K.; Samson, M.-F.; Carcea, M. and Narducci, V. (2011) The influence of long-term inputs of catch crops and cereal straw on yield, protein composition and technological quality of a spring and a winter wheat. International Journal of Food Science and Technology , 46, pp. 216-220.
- Published Version
Under conditions of restricted nitrogen (N) input such as in organic farming systems, crop N uptake must rely on N mineralised from applied animal manure, crop residues and native soil organic matter. Scarcity of N may impede the production of quality grain for bread production, and input and retention of N in soil are therefore important parameters for soil fertility. Toretain N in the crop-soilsystem, catch crops may be grown in breaks between main crops where they provide a signiﬁcant sink for N mineralised in late summer and autumn (Thomsen, 2005). In corporation of straw may likewise retain mineralised N by microbial immobilisation (Christensen, 1986) and will also directly add to the N mineralisation potential when the N supplied in the straw accumulates (Thomsen & Christensen, 2004). Under northern European conditions, winter wheat may generally be of lower quality than spring wheat, but winter wheat has a higher yield potential. When the N uptake is mainly based on N mineralised from either applied or indigenous soil organic matter, however, this may even out the quality diﬀerence between winter and spring wheat as the longer growing season of winter wheat may boost its N utilisation. Growing conditions are highly important for protein quantity whereas main lygenetic factors inﬂuence protein composition (Amesetal., 1999; Luoetal., 2000). Wheat grain proteins have been classiﬁed as albumins, globulins, gliadins and glutenins on the basis of their solubility (Osborne, 1907). Reverse-phase (RP) high performance liquid chromatography (HPLC) allows the quantitative determination of these diﬀerent ﬂour protein groups together with single proteins (α5-, α1,2-, α-, γc-type gliadins, x- and γ-type high (HMW) and low (LMW) molecular weights subunits of glutenin) (Wieser & Seilmeier, 1998). The proteins can also be divided into polymers (glutenins) or monomers (gliadins, albumins, globulins) based on their aggregating properties. The polymeric proteins are critical for governing wheat ﬂour processing properties, and their quantity and size distribution reliably measured by size-exclusion (SE) HPLC techniques have been shown to be important indicators of baking quality (Dachkevitch & Autran, 1989; Bateyetal., 1991). The aim of this study was to examine whether wheat yield and baking quality determined by chromatographic techniques together with rheological and chemical quality measurements could be improved by combining agronomic strategies consisting of wheat cultivars and long-term organic matter inputs. The variables tested were (A) a winter wheat and a spring wheat cultivar, (B) three catch crop strategies and (C) four straw incorporation rates.
|EPrint Type:||Journal paper|
|Keywords:||Animal slurry, clover, gluten proteins, nitrogen, rye grass|
|Subjects:|| Crop husbandry|
Farming Systems > Farm nutrient management
|Research affiliation:|| European Union > CORE Organic > AGTEC-Org|
Denmark > AU - Aarhus University > AU, DJF - Faculty of Agricultural Sciences
|Deposited By:||Hansen, Grethe|
|Deposited On:||17 May 2011 08:29|
|Last Modified:||17 May 2011 09:27|
|Refereed:||Peer-reviewed and accepted|
Repository Staff Only: item control page