The reasons for the formation of apple sugar centers are: high altitude, cold winter and less pests and diseases in fruit maturity; Sufficient sunshine time and large temperature difference between day and night; The soil is mostly sandy soil, with little pollutant deposition. Irrigation water is mostly glacial snowmelt, which is cold and clean; The picking period is late, and most of them are picked after they are fully ripe, so as to give enough time for the sugar to condense to the center of the apple.

Sugar-heart apple is not a special variety and does not have the expected genetic characteristics, but a physiological disease in apple production, commonly known as water heart disease, honey fruit disease and molasses disease, which mainly occurs in the late maturity and storage period of fruit. The "rock candy heart" apple was first introduced in Aksu, Xinjiang, China, and then began to rise in Daliangshan and Zhaotong.

Selection method of sugar-heart apple

First of all, look at the shape of the candy-heart apple. Sugar-heart apples are special in shape and oval, but they are not uniform in size and are generally short and fat. The side facing the sun will be more prominent, and the side facing the shade will be lower.

Secondly, the surface color of the sugar-heart apple is natural, and the fruit bottom is yellow-green. Finally, I went to smell the candied apples, which were very sweet. ?

The above contents refer to Baidu Encyclopedia-Sugar Heart Apple.