In order to make the late variety grow normally,a research o n rice two-stages seeding was made,which is sowing seeds indoor or in green ho use and transplanting into film-house when the young plants grow to a certain h eight.

Compound bioflocculant was produced from rice straws as carbon sources through two-step fermentation:rice straws were degraded by cellulose degradation bacterium HIT-3;flocculating bacterium F2-F6 produced bioflocculant from straws saccharifying liquid.

Taking the local rice variety Shashani as control,a rice variety screening experiment was conducted with Kendao 10,Songjing 6 and Ha 99 as entries through two-stage seedling nurturing.