Setaria viridis is a kind of dry forage grass, which is suitable for growing in mountainous hills and slopes below the altitude of 1500m, with annual precipitation above 750mm and pH value around 4.5. Sexual preference for warm and humid climate, especially in summer, can spend the summer at 40℃. The cold resistance is poor, and the stems and leaves can stay green for the winter in the frost-free area of South China. In case of -4℃ low temperature or heavy frost, the upper stems and leaves will be frozen. Can withstand short-term floods. Strong drought resistance, it remains green for 50 ~ 60 days under the conditions of high temperature, drought and no rain in summer in South China, and maintains good growth. Adapt to grow in areas with annual precipitation above 900 mm. It is very sensitive to nitrogen fertilizer and grows especially vigorously in fertile soil. It grows rapidly in South China from April to July, and 20 ~ 30℃ is the suitable temperature for its growth. The growth weakened in the high temperature and drought period from July to August, and turned vigorous in September to 165438+ 10. The growth period is 1 10 ~ 140 d, and the annual growth period is 260 ~ 3 10 d, which is suitable for cultivating intensive and high-yield mowing land, improving grass slopes and establishing artificial grassland in southern hilly areas. Setaria africana is an excellent grass species in Gramineae.