Abstract:

Abstract: Effects of nitrogen application and patterns on grain yield and quality of LinY 7287 were studied between 2009 and 2010 after ploughing corn straw to soil for many years, in order to provide scientific basis to high yield and quality production in southern Shanxi. The results showed that, the grain yield of LinY 7287 was increased along with application amounts when nitrogen was lower than 225 kg/hm2, and then reduced. At this application amount, wet gluten, sedimentation, development time, stable time and evaluation value were also the highest. But grain protein content and HMW-GS expression were all increased along with nitrogen application. The yield was increased along with the increased of the ratio of basal nitrogen. And all nitrogen being used to basal fertilization can got the highest yield. Protein content, wet gluten, sedimentation value, development time, stable time, evaluation value and HMW-GS expression were increased along with the increased of topdressing proportion of nitrogen. In this study, the high yield and quality can be acquired when application nitrogen was 225 kg/hm2, ratio of basal to topdressed nitrogen was 7:3 in southern Shanxi. Key words: wheat, nitrogen, yield, quality, HMW-GS expression