早熟陆稻品种分期播种的研究

根据对三年多点分期播种试验认定秦爱、寒9属于极早熟稻种,冀粳7号属于早熟稻种。按中国水稻品种分级标准,以上品种均属感光性和感温性弱的一类。它们的出苗期、营养生长期及成熟期各生育阶段的最佳比例是8:60:32。文中还提出了影响产量与品质的最适温度指标,可供引种和栽培该类品种确定计划抽穗期参考。

STUDY ON DIFFERENT SOWING SEASON FOR EARLY MATURING UPLAND RICE VARIETIES

Analyzing the datum of different sowing season in three years maintain that Qin Ai,Han No.9 of rice varieties are very early matruring and Ji Geng No.7 is an early matruring one.They are all weakness types in response to photoperi- od and temperature.The best structure of seedling phase,tlilering phase and matruring phase are 8:60:32.The optimum temperature index of yield and quality for the rice varieties were advanced,they may have value of reference in intruduction and culture for the varieties.