The formation of flower buds in fruit trees is influenced by many factors such as environmental conditions and nutrient content. Juvenile trees do not necessarily produce too much fertilizer.
First of all, from the age of vegetative reproduction, fruit trees have a period of vegetative growth, that is, from the time of planting seedlings to the beginning of the results. The juvenile tree features as follows: the tree rapidly expands and begins to form skeletons. When there is sufficient fertilizer and water, the growth potential is strong, the branches are mostly upright, the shoot growth is large, the leaves are large, the organization is not sufficient, although it has the ability to flower, However, since the material basis of sexual organs has not yet been formed and flower buds cannot be formed, it is necessary to go through a period of vegetative growth to lay a material foundation for the formation of flower buds. The length of vegetative growth of fruit trees varies with tree species, varieties, and rootstocks, such as apples and pears for 3 to 6 years, peach, plum and apricot for 2 to 3 years, persimmon for 4 to 6 years, and walnuts for 2 to 8 years.
Secondly, there is a large proportion of juvenile trees, long branches, large leaves, thick leaves, and strong photosynthetic function, but the accumulation level is not high, and the nutrient level of the tree is low, especially the level of inorganic nutrients is low and starch accumulation is late. The amount of root growth is large, the proportion of long roots is relatively increased, the growth potential is strong, and the growth rhythm of each organ of the tree is staggered and interfered with, and it is not easy to grow. Of course, the trees are too prosperous and their branches are flourishing. The light conditions are poor and it is also not conducive to the formation of flower buds. The key to the conversion of juvenile trees from vegetative growth to reproductive growth is to pruning and regulate fertilizers and waters through slow development, and on the basis of ensuring good nutritional status of trees, promote the development of branch shoots, increase the ability to accumulate, increase the nutrition level of the tree, and promote It is rationally distributed.
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