苹果来前转果是促进果面着色的有效措施。红色品种成熟之前，果实的阳面在光照条件下大量合成花青耷而呈红色，但果实阴面因缺乏光照刺激，往往着色不良，因而需要采用来前转果技术加以调节。一、转果方法因果实的着生位置及品种差异，来前转果常分为单向转果、双向转果等几种 Apple fruit before the turn is to promote fruit coloring effective measures. Prior to the ripening of the red varieties, a large amount of anthocyanidin was synthesized on the sun’s surface in red under light conditions. However, due to the lack of light stimulation, the dark side of the fruit tends to be poorly colored and therefore needs to be adjusted by the pre-fruiting technology. First, the method of fruit turnover Due to the location of the students and breeds differences, to turn often divided into one-way turn fruit, two-way turn fruit and several