The mango tree has deep roots and is more tolerant to drought, but severe drought will inhibit its vegetative growth, hinder the production and accumulation of organic nutrients, and indirectly affect flower bud differentiation and fruit growth and development. In the development of mango fruits, cell division and expansion require large amounts of water. Once water is lacking, fruit growth will be inhibited. The Jinsha River dry and hot valley area at the junction of Yunnan and Sichuan has an annual rainfall of 700 to 1100mm. The wet and dry seasons are distinct. The dry season is generally from November to May of the following year and lasts up to 7 months. The dry season rainfall accounts for only annual rainfall. About 4%, and mostly in May and November, almost no rain in other months. The mango orchards in the area have very poor irrigation conditions. Farmers often grow mangoes under natural conditions. In order to understand the effects of water supply on the growth and development of mango plants and fruits in the dry season, the author conducted this experiment.
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