Common flat fruits in daily life are passion fruit, pineapple, papaya, apple, plum, pineapple, sugarcane, grape, etc. Flat fruits are neither cold nor hot.
Pineapple is a terrestrial herb of the genus Pineapple, belonging to the family Pineapple, with a short stem. There are many leaves, which have a rosette-like appearance and are sword-shaped. The leaves born at the top of the inflorescence become smaller and often red. Petals are oval, pointed, purplish red in the upper part and white in the lower part; Flowering period is from summer to winter.
Pineapple originated in tropical South America, and spread all over Europe at the beginning of18th century. The introduction and cultivation of pineapple plants in China has a long history of 300 years. Most pineapples like sunshine, drought tolerance, high temperature and high humidity, and cool and ventilated in summer. Pineapple is propagated by seeds, asexual propagation and ramet propagation.
Selection method of pineapple:
The fruit of high-quality pineapple is cylindrical or oval with slightly pointed ends, with uniform and moderate size, regular fruit shape and few bud eyes. The mature pineapple skin is light yellow or bright yellow, with bluish green at both ends and bluish brown crown bud at the top; The skin of raw pineapple is livid or brownish.
If the top of the pineapple is full, the peel turns yellow, and the pulp becomes soft and orange-yellow, it means that it has reached nine maturity. Such pineapples are rich in juice, high in sugar, strong in fragrance and good in flavor. If you don't eat it immediately, you'd better choose a variety with hard fruit body, light yellow color and green luster, and about 70-80 mature varieties are better.
After cutting, the pineapple with shallow and small eyes, light yellow inside, thick flesh and fine core is a high-quality product. The inferior pineapple has many deep fruit orders, large internal tissue gaps, thin pulp and thick core; The pulp of immature pineapple is crisp, hard and white.