Pears ripen in September-October. Fruit growth and development process, the first period is mainly cell division, tissue differentiation, and the later period is cell expansion and pulp maturation. Fruit volume growth curve into S-shaped. Pear root growth has two growth peaks each year: the first growth peak when the new tip stops growing; the second peak in September-October. Under the appropriate conditions, pear root system can be annual growth, no dormant period. Pear tree because of the wide distribution range, and thus the climatic period varies greatly. In terms of flowering period, sichuan huili, the pear tree is generally in early mid-February blossom, the flower is white jilin yanbian in mid-May blossom; duck pear in changsha, hunan province in early march blossom, liaoning beizhen in early May blossom, the difference between the flowering period of nearly two months. Cultivated in the same area of pear tree, due to different types and varieties, there are differences in the climatic period, from bud budding to flowering, the earliest autumn pear varieties, white pear varieties a little later, sand pear varieties later than the white pear class, and to the western pear varieties for the latest, the range of change is about 10 days.

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Modern research shows that every hundred grams of pears (refers to the pulp) in addition to 85% of the water, it also contains indispensable human body a variety of nutrients, such as protein, fat, Carbohydrates, minerals such as calcium, phosphorus, iron, a variety of vitamins and organic acids such as citric acid, malic acid. Pear pulp contains glycosides and tannins, etc., have moistening lung, cough, phlegm, blood and other efficacy, tuberculosis, upper respiratory tract infections and acute and chronic bronchitis caused by dry throat, mute phlegm, constipation and urinary redness, etc., eating pears can alleviate the symptoms of the disease, and promote healing. Pear has antihypertensive, sedative effect, liver yang hyperactivity or liver fire inflammation type hypertension and heart disease can make blood pressure drop, dizziness, dizziness, palpitations and other symptoms disappear. Pear contains polyphenols bioactive substances, promote the body to discharge carcinogens PAHs and their metabolites. Eat pickles and barbecue and other easy to produce carcinogenic food, eat a pear or drink a cup of pear juice, is conducive to resistance to toxic substances. Pear has to promote gastric acid secretion, liver digestion and enhance the role of appetite, hepatitis, cirrhosis patients often eat pears can make the appetite, the spirit of good.