First: high altitude, strong sunshine, sufficient exposure time, increased sugar, acid, vitamin C and other contents.
Second: climatic conditions, large temperature difference between day and night, apples have accumulated a lot of organic matter, which will be converted into sucrose or glucose.
Thirdly, the annual rainfall is moderate, which ensures the normal photosynthesis of apples and preserves the sugar content of apples.
Fourthly, the soil layer is deep, the texture is loose, and the ability of ventilation, water storage and fertilizer conservation is strong, which ensures that apples are beneficial to human health.
As we all know, the main determinants of the sweetness of apple pulp are illumination, temperature difference between day and night, rainfall and nutrient elements. Next, I will explain in detail the benefits brought by the geographical advantages of Shaanxi's apple growing environment.
First, there is plenty of light.
The apple-producing areas in Shaanxi are 800-1200m above sea level, with light intensity of 3500-50000m candle and annual sunshine hours of 2200-2400 hours, including more than 300 hours from August to September. Moderate altitude and sufficient light resources make the fruit rich in color, the waxy layer thickened, and the contents of sugar, acid and vitamin C increased.
Second, the temperature difference between day and night.
The protection range of geographical indications of apples in Shaanxi is located at 34 38 ′-37 02 ′ north latitude and 65 438+005 35 ′-65 438+065 438+00 37 ′ east longitude, which belongs to subtropical monsoon climate with large temperature difference between day and night and 65 438+065 435.
Third, there is sufficient rainfall.
Due to the subtropical monsoon climate, the annual rainfall is 560-750 mm, and the air humidity is relatively low, which is not conducive to the occurrence and reproduction of various pests and diseases. In addition, sufficient rain can ensure the normal photosynthesis of plants. If there is too much rain, it will dilute the sugar in the fruit, and then reduce the sweetness of the fruit.
Fourth, adequate nutrition.
The soil in Shaanxi apple producing area is loessial soil, with deep soil layer and loess covering 80-200m. Loose texture, air permeability, water storage and fertilizer conservation, rich in trace elements beneficial to human health, such as potassium, magnesium, calcium and zinc, and beneficial to apple root growth.
Here, everyone will understand that the dimension that determines the delicious taste of apples is the sweetness of apples. Although the sweetness of apples in Shaanxi is sweet enough, you should pay careful attention to buying apples. Shaanxi apple is just a packaging name, but you can't decide whether the apple pulp you sell is sweet enough, so you'd better try the sweetness of the apple before buying it.