Effect of Nitrogen Nutrition on the Quality of Different Types of Wheat Varieties

The effects of different nitrogen applied amounts on quality characters of different types of wheat (varieties) (strong, middle and weak gluten type) were studied. The result showed that the (correlation) (between) the application rate of N-fertilizer and protein content of strong (or middle) gluten (variety) was (significantly) (positive) whereas it was in a relation of quadric curve with protein content of weak gluten (variety). With the (increase) of nitrogen applied, the sedimentation value was significantly (increased), the degree of softening was (reduced), the development time and (stability) time was prolonged, and the wet gluten content could (also) be (increased). With the (increase) of nitrogen fertilizer applied, the development time and (stability) from farinograph gradually rose. When the amount of N application was more than 225 kg/hm~2, the regulation (effect) of nitrogen was weakened, and showed a negative effect of nitrogen on strong (or middle) gluten variety.