Dynamic Changes of Nutrients in Different Growth Stages of Trichosanthes kirilowii in Shishou City.

To explore the relationship between soil nutrients, plant nutrients, and the growth and development of Trichosanthes kirilowii, the soil pH, organic matter, available nitrogen, available phosphorus, available potassium content and lea total nitrogen, total phosphorus, total potassium, and SPAD in different growth stages of T. kirilowii in the main production area of Shisliou City were measured and analyzed. The changes in soil nutrient content and lea nutrient content at different growth stages of T. kirilowii were compared, and correlation analysis was conducted. The results showed that the average soil pH, organic matter content alkaline nitrogen content available phosphorus content and available potassium content during the entire growth period of T. kirilowii were 7.03, 14.01 g/kg, 98.79 mg/kg, 14.84 mg/kg, and 135.20 mg/kg, respectively; the average total nitrogen content total phosphorus content total potassium content and SPAD of the leaves were 0.55%, 0.23%, 1.78%, and 77.66, respectively. The nutrient dynamics of T. kirilowii at different growth stages exhibited certain regularity, with most nutrients reaching their maximum values during the flowering and fruiting stages, and then showing a decreasing or stabilizing trend. There was a varying degree of correlation between the nutrient content of leaves and soil, among which the nitrogen, phosphorus, and potassium contents of leaves were significantly or extremely significantly correlated with soil organic matter and alkaline nitrogen content. It can be seen that the nutrient abundance or deficiency level of soil in T. kirilowii field significantly affected the nutrient content of the leaves at different growth stages, thereby restricting its growth and development status. [ABSTRACT FROM AUTHOR]