关键词: 东当归[Angelica acutiloba （Sieb. et Zucc.） Kitagawa], 海拔, 定植密度, 生长, 产量, 宜昌市

Abstract: To study the effects of altitude and planting density on growth and yield of Angelica acutiloba in Yichang city, Hubei Province, two altitude levels （600 m and 1 100 m） and three planting density levels （30 cm×40 cm, 35 cm×40 cm, 40 cm×40 cm） were set up, and the main agronomic characters of aboveground part in different periods and the main yield index in the harvest period of Angelica acutiloba were determined. The results showed that under the 600 m altitude and 35 cm×40 cm planting density treatment, the plant height of Angelica acutiloba in the vigorous growth period was the highest（14.80 cm）, and the number of stems was more （5.20） at the peak growth stage. Under the 1 100 m altitude and 35 cm×40 cm or 40 cm × 40 cm planting density, the plant height was higher in the root swelling stage, which was 42.75、42.65 cm, respectively. Under the three treatments at 1 100 m altitude and one treatment with the planting density of 40 cm×40 cm under the 600 m altitude, the fresh root weight per plant was higher, which was 218.33~265.26 g. Under 1 100 m altitude and 30 cm×40 cm or 35 cm×40 cm planting density, the yields of fresh roots were higher, which were 15 157.83, 16 725.66 kg/hm², respectively. Both fresh root weight per plant and equivalent fresh root yield had a significant negative correlation with the number of stems in the peak growth period, and the correlation coefficients were -0.868 and -0.820, respectively. In conclusion, planting at 600 m altitude was beneficial to the growth of Angelica acutiloba in the vigorous growth period, and planting at 1 100 m altitude was beneficial to increase the accumulation of nutrients in the aboveground part and improve the weight per plant and total yield. The planting density of 35 cm×40 cm and 40 cm×40 cm was beneficial to the growth of the aboveground part of Angelica acutiloba, and the planting density of 30 cm×40 cm was beneficial to increase the total yield. It was suitable to plant Angelica acutiloba under the conditions of 1 100 m altitude, 30 cm×40 cm planting density in Yichang City, and the yield per plant and total yield were higher.

Key words: Angelica acutiloba （Sieb. et Zucc.） Kitagawa, altitude, planting density, growth, yield, Yichang City