Answer: vegetative growth can be simply understood as the growth of branches, leaves and roots of trees. Reproductive growth is flower bud differentiation, flowering, fruiting, fruit and seed growth. In the whole life cycle of trees, the young tree stage is also called childhood, which is mainly vegetative growth; In the first fruiting period, vegetative growth is dominant and reproductive growth is secondary; The fruiting period is the basic balance period between vegetative growth and reproductive growth; Reproductive growth is the main stage of full fruit, supplemented by vegetative growth; Aging is a serious decline in reproductive growth and nutritional growth. In different periods, the distribution direction of nutrients in trees is different, which determines the transformation between vegetative growth and reproductive growth. Pruning technology is an important means to adjust the nutrient distribution of trees. Pruning can adjust the transformation between vegetative growth and reproductive growth. For example, an upright branch grows vigorously in nutrition. When pruning in summer, the growth direction is changed by twisting the branches to make them grow horizontally or droop, and the branches change from vegetative growth to reproductive growth, and the growth potential is relaxed, and soon they become fruiting branches. Another example is that a fruiting branch is mainly reproductive growth. If pruning is carried out in winter, it will promote the growth of new jujube trees. At this time, the reproductive growth of fruiting branches was inhibited and the vegetative growth was strengthened.