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以楚粳38等5个粳稻品种为材料,研究了播期对不同粳稻品种产量和稻米品质的影响。结果表明,这些粳稻品种在陕南种植时,随着播期的推迟,成熟期相应推迟,产量也逐步下降;随着播期推迟,灌浆结实期日平均气温的降低,粳稻品种的垩白粒率、垩白度极显著降低,外观品质变优;不同粳稻品种之间产量、稻米品质差异显著。因此,选用优质、高产品种同时适当延迟播种,是解决陕南地区粳稻品种产量和稻米品质矛盾的有效途径。
The effects of sowing date on the yield and quality of different japonica rice cultivars were studied using five japonica rice varieties such as Chujing 38. The results showed that with the sowing date delayed, the maturity duration of these Japonica rice varieties was delayed and the yield was gradually decreased. When the sowing dates were delayed, the average daily temperature at the grain filling stage decreased, and the chalky grain rate , The chalkiness degree decreased significantly and the appearance quality improved. The yield of different japonica rice varieties and the quality of rice were significantly different. Therefore, it is an effective way to solve the contradiction between yield and rice quality of japonica rice varieties in southern Shaanxi.