适当的早播或晚播可以降低稻米垩白度；
Rice chalkiness degree decreased in timing early or late sowing.
目前稻米品质存在的主要问题是垩白米率高、垩白度高、整精米率低和食味差。
The major quality problems are higher chalky rice rate, higher chalkiness score, lower head milled rice yield, and poor eating quality.
垩白粒率和垩白度是中籼杂交稻组合稻米品质提升的主要障碍因子。
Improving the quality of medium indica hybrid rice combinations was restricted by chalky rice rate and chalkiness degree.
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