Abstract:

The aims are to achieve the high quality and stable production of weak gluten wheat and solve the problem of its poor quality stability. ‘Ningmai 13’ was used as the material, and variance analysis was adopted to investigate the effects of increasing density and reducing nitrogen on the yield, the population quality index and grain quality of weak-gluten wheat. The results showed that, the LAI and dry matter accumulation both indicated a trend of increasing first and then decreasing with the increase of density at the nitrogen application level of 240 kg/hm². The density exceeding 240×10⁴/hm² would lead to the decrease of LAI and dry matter accumulation. Under the density of 240×10⁴/hm², the nitrogen content exceeding 240 kg/hm² could cause the decrease of wheat leaf area index, SPAD value, dry matter accumulation after flowering and yield. Appropriately increasing density and reducing nitrogen was conducive to improving the quality and stable yield of weak gluten wheat, while excessively increasing density and reducing nitrogen would result in yield decreasing and unstable quality. Based on these results, the recommendation to achieve high yield and better quality for ‘Ningmai 13’ is: the planting density of 240×10⁴/hm², the nitrogen application rate of 180 kg/hm² and the nitrogen application mode of 7:1:2:0.

Key words: wheat, weak gluten wheat, ‘Ningmai 13’, planting density, nitrogen application, yield, grain quality