Effects of Alternate Wetting and Drying Irrigation during Grain Filling on the Seed-Setting Rate and Grain Weight of Two Super Rice Cultivars Effects of Alternate Wetting and Drying Irrigation on Yield and Water Use Efficiency of Rice Effects of Dry Matter Accumulation and Photosynthate Transporation of Stem and Sheath and Grain Production Under Different Water and Nitrogen Management in Rice Effects of Water Management and Slow/Controlled Release Nitrogen Fertilizers on Biomass, Nitrogen Accumulation, Translocation, and Distribution in Rice