Effects of cultivar, nitrogen fertilization rate and environment on yield and grain quality of barley

✍ Scribed by Oscarsson, M; Andersson, R; Åman, P; Olofsson, S; Jonsson, A

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 231 KB
• Volume: 78
• Category: Article
• ISSN: 0022-5142
• DOI: 10.1002/(sici)1097-0010(199811)78:3<359::aid-jsfa126>3.0.co;2-r

✦ Synopsis

Ten barley cultivars, including covered and naked types, varying in their content of total starch, amylose, protein and b-glucan, were grown in di †erent years, at various locations and nitrogen fertilization rates. The barley cultivars showed a large variation in yield (3250È6690 kg ha~1), thousand kernel weight (40È50 g), bulk weight (660È815 g litre~1), starch (51È67% of DM), protein (8È15% of DM), b-glucan (3É5È5É9% of DM) and ash (1É9È2É5% of DM). The naked cultivar SW 8775 had the highest starch content and the high amylopectin cultivar (SW 7142-92, waxy) had the lowest. The waxy starch barleys had the highest protein content, while the normal starch barleys (Golf and Lina) had the lowest protein content at each N-rate. Higher content of b-glucan was found in the waxy cultivars (5É0È5É9% of DM) and high amylose cultivars (5É6È5É9% of DM) than in the other barley cultivars (3É5È4É8% of DM). The results were evaluated by analysis of variance (ANOVA) and principal component analysis (PCA), and both conÐrmed that nitrogen fertilization rate was of great importance for the protein content. PCA revealed that protein and b-glucan were negatively correlated with starch and yield. The ANOVA showed that the cultivar factor was signiÐcant for all variables, but especially for the b-glucan content, which responded di †erently to the nitrogen fertilization rate during the 2 years. In this study, environmental e †ects were generally of less importance than the barley cultivars for the di †erent variables.