Abstract: A field experiment was carried out to explore the effects of different transplanting machine with 25 cm row spacing and 30 cm row spacing on yield of double cropping rice. The results showed that the application of 25 cm spacing transplanting machine had obvious yield advantage in early rice, but the increasing effect was not obvious in late hybrid rice. In practice, we should select the appropriate density and make full use of the advantages of different type of transplanting machine based on the characteristics of different types of rice.

Key words: double cropping rice, machine-transplant, row spacing

摘要： 引入25 cm行距的插秧机，与生产上常用的30 cm行距插秧机进行小区对比试验，以探讨该型插秧机对乐清市早、晚稻的适应性及配套高产栽培技术。试验结果表明，早稻应用25 cm行距插秧机具有比较明显的增产优势；而连晚杂交稻应用行距25 cm插秧机的增产效果不明显。生产上应根据不同类型水稻的特征特性，正确掌握插秧密度，充分发挥各类插秧机的增产优势。

关键词: 双季稻, 机插, 行距