我国北方地区年降水量较少，特别是１～２月份气候寒冷干燥，苹果树易因蒸腾失水而抽条，应采取预防措施。１、追肥与灌水。本着“前促后控”的原则，一般在７月以前灌水２～３次，７月底以后停止灌水，直至１１月初灌冻水，冻水要灌透。在控水期间还要搞好排水。追肥一般... The annual rainfall in northern China is less, especially in January and February, the climate is cold and dry, and apple trees are prone to runoff due to transpiration and water loss. Precautions should be taken. 1, top dressing and irrigation. In the “before and after the control” principle, generally in July before irrigation 2 to 3 times, after the end of July to stop irrigation until early November frozen water, frozen water to be thoroughly. Drainage should be done during water control. Top dressing general ...