四季修剪是苹果树修剪的新趋势在苹果树的年生长周期中，从根系生长开始，进行萌芽、开花、幼果发育、新梢生长、花芽分化、果实膨大、果实成熟，直至落叶休眠，果树这种节奏生长，总是伴随着相应的营养代谢过程。果树光合作用制造的有机营养和从根系吸收的矿质无机营养，... Four-season pruning is a new trend of apple tree pruning In the annual growth cycle of apple trees, starting from the root growth, germination, flowering, young fruit development, shoot growth, flower bud differentiation, fruit enlargement, fruit ripening until dormant leaves, fruit trees This rhythm of growth, always accompanied by the corresponding nutrition and metabolic processes. Organic nutrition produced by photosynthesis in fruit trees and mineral inorganic nutrition absorbed from root system, ...