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2 播期与气温及成苗率的关系

Table 2 Relationship between sowing date and temperature, seedling rate

品种 Variety 项目 Project 方程 Equation 成苗率与单株干物质积累量相关性 Correlation between seedling rate and dry matter accumulation per plant 成苗率与单位面积干物质积累量相关性 Correlation between seedling rate and dry matter accumulation per unit area 中早35 Zhongzao 35 成苗率与播期 Seedling rate and sowing date y=2.9227x+36.042 -0.83** 0.72* 分蘖前日平均气温与播期 Average daily temperature and sowing date before the tillering y=0.6304x+15.185 - - 中早39 Zhongzao 39 成苗率与播期 Seedling rate and sowing date y=3.9253x+29.658 -0.95** 0.73* 分蘖前日平均气温与播期 Average daily temperature and sowing date before the tillering y=0.8851x+14.519 - -