The application of pear early harvest cultivation technology needs to ensure a good growth environment, in which the requirements for environmental climate are relatively strict.
Temperature
In order to ensure the normal growth and development of pear trees, growers need to choose the right temperature for cultivation, pear trees grow relatively fast in a warm environment, so growers should provide a higher temperature in their growth period and a relatively low temperature in their dormant period. Depending on the type of pear tree, the most suitable growth temperature will also change, among which the white pear is 7-15 °C; Huanghuali is about 10 °C; The suitable temperature of sand pear is higher, above 15 °C and below 30 °C [1].
Illumination
The pear tree is a light-loving tree species that increases yields in a well-lit environment and decreases in a shady environment, or even results in zero yields. The light duration required for pear trees to grow for one year is 1600h, and the production rate of pear trees accelerates when the relative light intensity reaches 35%, and the production rate is slow when it is below 15% [2].
Moisture content
The water in the fruit of pear trees accounts for more than 80%, which is the most important component of pears, so the demand for water in the growth of pear trees is large. The overall transpiration coefficient is guaranteed to be around 340, and the allowable floating range of 60 cubic meters of leaf area needs to evaporate more than 10 grams, otherwise it will hinder the growth of pear trees. According to different varieties, the water demand of pear trees will change, among which white pears and autumn pears have a larger water demand, and sand pears have a smaller demand [2].
