Shading treatment increase chalky rice rate, chalky area and chalky degree on which curved panicle types and high quality varieties were apparent in chalky quality.

• 在营养品质上，遮光使各类型品种的蛋白质含量增加，且直穗品种增加的幅度较大，使直链淀粉的含量下降，且直穗品种降低得较明显。