The study was conducted from 2004 to 2005, in the agriculture weather experiment station in Tai-an City(36°11′N,117°09′E,,Elevation 128.6m). Effect of Nitrogen Nutrition on Yield And Quality of Major Wheat Planted in Different Period and Their Physiological Basis was studied systematically by six wheat species: B1、T4、Y15、L14、L23 and S11, by the technical root of combination of field experiment and chemical analysis. The main results were as follows:
1. Effect of nitrogen nutrition o...