RESUMO
Objective: To study the effect of micronutrient fertilizer ratio on the growth and yield of aconite daughter root (the processed daughter root of Aconitum carmichaelii). Methods: Taking A. carmichaelii (Ranunculaceae) as test material, to study the growth and yield of aconite daughter root under the various ratio of Zn, B, Fe, and Mn by the uniform design. Results: To promote the growth and improve the yield of aconite daughter root, the optimum ratio of fertilizer Zn-B-Fe-Mn was 4:1:1:2. Under this ratio, the size of the tuber, the number of the fibrous roots, the length of fibrous roots, the volume of the sub-root, and the dry weight of the tuber, the fibrous roots, and the mother root were significantly or very significantly higher than those under the other fertilizer ratio, while the plant height and the dry weight of leaf were lower than those in the control treatment, with the weight of fibrous roots and the mother roots increased by 24.5% and 25.9% compared with those in the control treatment. The results also showed that there existed negative correlation between the plant height and the yield of per plant, while the dry weight of the fibrous roots and the mother roots showed significantly positive correlation with the yield of per plant. Conclusion: The above mentioned ratio of Zn-B-Fe-Mn as 4:1:1:2 is the best, since it could promote the growth and improve the yield of aconite daughter root more than the other treatment.