Because red pitaya contains betanin. Red pitaya, beet, etc. , rich in lycopene. β -carotene is the main coloring substance of purple-red foods such as pitaya and beet, which has strong antioxidant capacity, helps to eliminate free radicals in the human body and resist aging. Stripping the outermost sepals of pitaya, the exposed purple endothelium is also rich in lycopene.
Pitaya: Pitaya is a tropical and subtropical fruit, which likes light and shade, heat and drought, and fat and barren. It grows rapidly in a warm, humid and sunny environment. When cultivating in the open field in spring and summer, water more to keep the root system growing vigorously. Drainage should be carried out in time in rainy weather to avoid stem rot caused by infection with germs. Its stems can also grow on rocks, and this plant is very wind-resistant. As long as the support is firm, it can resist typhoon.
Pitaya can tolerate low temperature of 0℃ and high temperature of 40℃, and the optimum growth temperature is 25-35℃. Pitaya can adapt to a variety of soils, but neutral soil and weak acid soil with high humus content and water and fertilizer conservation are the best.