Setting Physiology of the Superior and Inferior Grains of Hybrid Rice Liangyoupeijiu Effects of Water Stress on the Main Characters of Superior and Inferior Grains Quality and the Properties of RVA Profile during Grain-filling Stage Protein expression characteristics and their response to nitrogen application during grain-filling stage of rice (Oryza Sativa.L) Comparison of Starch Granule Morphology and Size Distribution in Superior and Inferior Grains of Three Cereal Crops Influence of Planting Methods on Grain-Filling Properties of Super Rice