Abstract: In order to understand the effects of different organic fertilizers on the growth and development of Mirabilis Jalapa L., different organic fertilizers were used to conduct experimental research on annual M. Jalapa. The rules of soil nutrient content and growth indexes under different organic fertilizers treatment were analyzed. The results showed that the soil nutrient content was obviously increased by applying different organic fertilizers, and the overall variation trend of soil nutrient content was the same under different treatments. The application of organic fertilizer had an obvious promoting effect on plant growth and root activity. The application of organic fertilizer could increase the photosynthetic rate and decrease the transpiration rate of M. jalapa, and enhance the resistance of plants.

Key words: organic fertilizer, Mirabilis Jalapa L., growth and development