Researching on growth and development of the Cham Dao color rice variety (Son La) in some different growing areas

Abstract

The local colored rice variety Cham Dao originated in Muong La district, Son La province. The variety has a growing period of mid-day group, and has the ability to grow well in upland and wet fields. The tree produces strong branches and reaches 120 - 125 cm in hight. Semi-round rice grains, brown rice shell. The rice is slightly sticky and rich. Amylose content 19.3%, anthocynine content 10.4 mg/kg. With the goal of expanding and developing local colored rice varieties with the potential to spread to many different regions to meet consumer demand, the research has conducted experiments in three regions: Son La, Dien Bien and Lai Chau. The results show that the Cham Dao rice variety has the ability to expand and develop in Lai Chau, the variety grows and develops well, is less susceptible to pests and diseases: Leaf blight (point 0), rice blast, brown planthoppers and stem borers (point 1). The actual yield of the variety is highest when grown in Lai Chau and reaches 2.92 ton ha^-1 (2021) and 2.90 ton ha^-1 (2022), higher than when grown in Son La (where the variety originates) reaching 2.72 ton ha^-1 (2021) and  2.65 ton ha^-1 (2022). The actual yield of the variety is lowest when planted in Dien Bien at 2.11 ton ha^-1 (2021) and 1.74 ton ha^-1 (2022).