Nutritional characteristics of Salvia Miltiorrhiza: Salvia Miltiorrhiza is the most sensitive to nitrogen, followed by phosphorus and finally potassium. When these three nutrients are deficient, physiological diseases will occur in plants, and their symptoms are as follows: nitrogen deficiency: plants grow slowly, and in severe cases, their growing points are underdeveloped or even necrotic; Old leaves turn yellow and new leaves turn yellow; The roots are thin and few; The output is extremely low.

Phosphorus deficiency: the leaves are green, sometimes reddish brown, with obvious brown spots, and the spots expand in the later stage and the leaves are necrotic; The heart lobe grows slowly; The number of roots is small and thin.

Potassium deficiency: green to dark green leaves, wide leaves; Petiole is slender, tender and too long: sometimes there are large brown spots on the edge of old leaves, and sometimes there are obvious spots.