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研究了播期对不同类型水稻品种的生长发育、产量和产量构成因素的影响,结果表明:随着播期的推迟,5个不同类型的粳稻品种生育期明显缩短,株高降低,产量结构各因子也随播期的推迟而呈明显减少趋势。苏北地区中熟中粳品种安全播期6月29日之前,迟熟中粳在5月上中旬播种可以正常成熟,早熟晚粳于5月上旬播种能够成熟,中熟晚粳在播种期范围内,均不能正常成熟。
The effects of sowing date on the growth, yield and yield components of different types of rice cultivars were studied. The results showed that with the sowing date delayed, the growth stages of five different japonica rice varieties were significantly shortened, the plant height was reduced, Factors also showed a significant decrease with the delay of sowing. Before medium-maturing medium japonica varieties in northern Jiangsu were sowed safely before June 29, late-maturing medium japonica rice could be sown normally in mid-May and early-maturing late japonica rice could be sown in early May. Middle-maturing late japonica rice could be matured in the sowing period Neither of them can mature normally.