1. Soil: Papaya in Henan does not require much soil, and neutral sandy soil, loam and clay loam with deep, loose soil layer, good drainage, rich organic matter and good air permeability are most suitable for planting papaya. For fertilizer requirements, nitrogen should not be too much, so as to avoid excessive growth of stems and leaves and less fruits, and phosphorus and potassium fertilizers should be re-applied in the middle and late stages.

2. temperature; Papaya likes warm climate with uniform rainfall distribution, and is not resistant to high temperature and cold. The stems and leaves are frozen at 0℃, and all the stems and leaves freeze to death at -3 ~-5℃. The growth rate is slow at 10℃, and the best growth rate is at 20 ~ 25℃. When the monthly average temperature is about 20℃, the daily growth of stems and vines is only 2 ~ 3 cm, while when the temperature is above 25℃, the daily growth of stems and vines reaches 15 ~ 2~3cm, but too high temperature is also unfavorable. When the temperature is higher than 35℃, the growth rate is obviously inhibited. The suitable temperature for flowering and fruiting is 15 ~ 20℃. When the temperature is lower than 15℃ or higher than 25℃, it will affect flowering and pollination, reduce the fruit setting rate and affect the development of melon. When the temperature is lower than 5℃, the melon stops swelling.

3. Moisture: There is a great demand for water, especially in the high temperature season from July to August. The air and soil should be kept high humidity, otherwise the vines will stop growing and the leaves will turn yellow. When the soil moisture is insufficient in the flowering and fruiting period, there will be fewer flowers, more fallen flowers, lower fruit setting rate and smaller melons.

4. Sunshine: Papaya is a short-day crop. After a certain amount of vegetative growth, it began to breed under the condition of short sunshine in autumn. The average monthly temperature is about 22℃, and the monthly sunshine hours 170 hours are suitable for the flowering and fruiting requirements of papaya. So in the south, it is suitable for planting in mountainous areas with cool climate.

5, growth habits: bergamot likes temperature, heat resistance, not cold resistance. The optimum growth temperature is 12 ~ 25℃, and the growth will be inhibited when it exceeds 30℃, and the extreme high temperature is 40℃, and the chilling injury will occur when it is lower than 5℃. Suitable for moderate light intensity and shade tolerance; Require air humidity; Suitable for growing in fertile soil with high fertility and strong water retention.

6. Matters needing attention

The flowering and fruiting of Henan bergamot are concentrated, which has a great influence on the growth of stems and vines. Picking in time and feeding the consumption of nutrients are beneficial to the growth and development of melons and increase the yield. Generally, each plant can recover 200 ~ 600 melons, and the output of 667 square meters is 3000kg~5000kg.