不同播期对直播早稻干物质积累的影响

段里成,郭瑞鸽,张坤,章起明,刘丹,杨爱萍,桂保玉,金国花,蔡哲

Effects of Different Sowing Dates on Dry Matter Accumulation of Direct-Seeded Early Rice

Licheng Duan,Ruige Guo,Kun Zhang,Qiming Zhang,Dan Liu,Aiping Yang,Baoyu Gui,Guohua Jin,Zhe Cai

表1 积温与播期的线性关系

Table 1 Linear relationship between accumulated temperature and sowing date

品种Variety 项目Project 方程Equation R2 中早35 Zhongzao 35 抽穗后积温与播期Accumulated temperature and sowing date after heading y=19.287x+759.62 0.89 全生育期积温与播期Accumulated temperature and sowing date during the whole growth period y=-6.5567x+2616.2 0.54 中早39 Zhongzao 39 抽穗后积温与播期Accumulated temperature and sowing date after heading y=20.945x+748.90 0.85 全生育期积温与播期Accumulated temperature and sowing date during the whole growth period y=-2.6442x+2559.9 0.05