Abstract:

To explore the suitable sowing date and mechanical transplanting method for early rice in Wenling City, a comparative experiment was conducted on bowl seedling machine transplanting and carpet seedling machine transplanting under different sowing dates of early rice. The results showed that the resistance and production stability of bowl seedling machine transplanting early rice were significantly better than those of carpet seedlings. The sowing date of bowl seedlings could be 10-15 days earlier than that of carpet seedlings, and the optimal sowing date is March 1st. The maturity date of early rice bowl seedlings was 3-6 days earlier than that of carpet seedlings, and 7-10 days earlier than that of early rice direct-seedings. In the production of early rice, bowl seedling transplanting with soil and without planting injury was conducive to seedling survival and tillering occurrence. Compared with carpet seedling machine transplanting, it had the advantage of early tillering for 10 days, the tillering outbreak period was 15-20 days after transplanting. Most of the tillers were effective tillers at low nodes, which were easy to form large panicles. Under the same sowing date, the bowl seedling machine transplanting early rice had the advantage of increasing yield than carpet seedling machine transplanting. The yield increase was mainly due to the more panicles, larger panicles and more grains caused by the early tillering of bowl seedlings.

Key words: early rice, sowing date, bowl seedling, carpet seedling