Experiments were conducted to study effect of rice straw return into field on rice growth, rice grain yields, and soil fertility. The results showed that in the Dongting lake potassium-poor region, rice straw return into field could promote growth of late rice and increase and the burliness rate, and thousand-grain heavy, and increase the soil organic matter content, and the land productivity. It can promote better the growth of late rice and the land productivity obviously under rice straw return into field and using moderate the potassium fertilizer.
Soils and Fertilizers
late rice, rice straw return into field, using potassium