Effect of Row Spacing on Grain Yield and Quality of Super-high Yielding Wheat

To study the effects of row spacing on grain yield and quality of different (super-high) yield wheat (varieties), the properties of grain yield and quality of different (super-high) yielding wheat (varieties) were studied under different row spacing. The results showed that the trend of grain yield, total spikelet number and ear number of (super-high) yielding wheat varieties under the same planting density(225×10~4/hm~2) was that the highest of that were obtained at row spacing 16.67 cm. The optimum row spacing required for realizing the biggest ear number of (super-high) yielding wheat varieties was different because row spacing and variety of (super-high) yielding wheat interact on ear number. The biggest ear number were inchieved at row spacing of (16.7 cm) for Zhoumai 16 and Aizao 8, for Wenmai 6-986 and Bainong 9711 at 20 cm and for Yanshi 4110 at 23.3 cm. The influences of row spacing on the main quality properties, such as protein content and (sedimentation) value,were not significant. It suggests that grain yield may be increased by adjusting row spacing for raising ear number based on the (effects) of each yield components on yield of (super-high) yielding wheat (varieties).