以杂交中稻组合川谷优642和蓉优1015为材料，在冬水田区大面积高产栽培技术条件下，研究了不同收割期、干燥时间与干燥方式对整精米率的影响。结果表明，品种、收割时期、干燥时间与干燥方式4个因子及其互作效应对整精米率有极显著影响。川谷优642的整精米率比蓉优1015高，干燥时间短的处理比干燥时间长的处理整精米率高，坝晒处理比用簸箕晒的处理整精米率高。籽粒水分含量在12.27%~14.67%之间时，整精米率与籽粒含水量呈极显著正相关关系。

Under the condition of large area and high yield cultivation techniques of rice in winter water-logged field, the effects of harvest period, drying time, drying method on head rice rate were studied with Chuanguyou 642 and Rongyou 1015. The results indicated that there were very significant effects of varieties, harvest period, drying time, drying method and their interactions on the head rice rate, and the head rice rate of Chuanguyou 642 was higher than Rongyou 1015, the head rice rate of shorter drying time, method of dam drying, was higher than longer drying time and method of dustpan drying. There were very significant positive correlation between the head rice rate and the grain moisture content.