黔东南自治州从江县,海拔154—1643米,年降雨量1200毫米,年平均温度18.5℃。境内大小河流交错,山高谷深,森林茂密,全县森林覆盖面积达39％,稻田以冷、阴、烂、锈为其特点,当地农民长期栽培着水稻地方品种——“禾”。“禾”,由于自然选择和人工选择的结果,形成了各种品种群,即无芒壳厚的旱禾群;长 Qiandongnan Autonomous Prefecture in Congjiang County, 154-1643 meters above sea level, the annual rainfall of 1200 mm, the annual average temperature of 18.5 ℃. The territory of the river staggered in size, deep valleys, dense forests, the county forest coverage area of ​​39%, paddy fields to cold, overcast, rotten, rust is characterized by long-term cultivation of local farmers local rice varieties - “Wo.” “Wo”, due to natural selection and artificial selection results, the formation of a variety of species groups, that is, no shell thickness of dry Wo group; long