通过增设漂浮育苗限制因子试验 ,得出思南县漂浮育苗技术为 :播种期在 3月上旬能满足水温要求 ,需在池底用 10cm生牛粪作酿热物 ;基质的装填应使基质手捏成团 ,落地全散为宜 ;当种子出苗后必须经常进行晾盘 ,累计时间在 2 40h以上 (“小十字前”不少于 80h) ;剪叶次数一般 4～ 6次 ,且配合施用壮苗素效果较好 ;注意苗肥、硫酸铜的施用时间、浓度和次数 By adding the floating seedling restriction factor test, it was concluded that the floating seedling raising technology in Sinan County was that sowing period could meet the water temperature requirement in early March, and 10cm cow dung should be used as the brewing material in the bottom of the pond; Pinch into a group, scattered on the ground appropriate; when the seeds must be frequently dried plate after emergence, the cumulative time in more than 2 40h (“small cross before” not less than 80h); the number of leaves generally 4 to 6 times, and with the application Zhuangmiaotu better effect; pay attention to Miaofei, copper sulfate application time, concentration and frequency