2. At the peak of vegetative growth, a large number of organs such as roots, stems and leaves were formed, which laid the foundation for the formation of later product organs. Because the organ formation period of the product is the period of maximum consumption and accumulation of assimilated substances. After the seedling stage, the annual fruits and vegetables have a vigorous vegetative growth period, and the branches, leaves and roots grow vigorously, which lays the foundation for future flowering and fruiting. Biennial leafy vegetables or root vegetables also have a vigorous vegetative growth period, which will become the nutritional basis for the formation of leafy bulbs and fleshy roots in the future. Potatoes and garlic also have vegetative growth periods, which lay a nutritional foundation for the formation of storage organs. The supply of fertilizer and water should be strengthened during this period.
3. The formation period of storage organs is the unique period of biennial or perennial vegetables, such as Chinese cabbage, radish, onion and garlic. During this period, the growth rate of nutrients slowed down, and nutrients were mainly used for accumulation. Nutrients such as Chinese cabbage and cabbage accumulate in leaf bulbs; Nutrients of root vegetables accumulate in fleshy roots; Nutrition of onion and garlic accumulates in bulbs. This period is the organ formation period of the product, so it is necessary to arrange this period in the most suitable season for cultivation, and at the same time, there should be enough fertilizer and water.
4. Dormancy period of storage organs For biennial or perennial vegetables, after the formation of their storage organs (product organs), in order to adapt to adverse environmental conditions, the storage organs are used for dormancy. This dormancy is a spontaneous physiological dormancy. After the formation of organs, the products must go through a dormant period, during which they will not germinate and grow even if they encounter suitable environmental conditions. Such as potato tubers and onion bulbs. The body dormancy of most vegetable storage organs is forced dormancy, such as Chinese cabbage, radish products, etc. Once suitable growth conditions are met, they can germinate or bolt.
5. After a series of changes, the vegetative growth in reproductive period began to differentiate into flower buds on the growth cone of the stem, that is, it entered the reproductive growth period. This period can be divided into the following three stages.
6. Flower bud differentiation period refers to a period of time from flower bud differentiation to flowering. It is a morphological feature of the transition from vegetative growth to reproductive growth of plants. Flower bud differentiation of fruits and vegetables began at seedling stage; After two years of vegetable development, the growing point begins to differentiate into flower buds, and then the flower buds bloom. In cultivation, it is necessary to have environmental conditions that meet the differentiation of flower buds and make them develop in time.
7. The flowering period from budding to pollination and fertilization is an important period for reproductive growth. During this period, plants have weak resistance to the external environment, and are sensitive to temperature, light, water, etc. If the temperature is too high or too low, the light is insufficient, or it is too dry, it will affect pollination and fertilization, resulting in falling flowers and fruits.
8. After pollination and fertilization at fruiting stage, the ovary expands to form fruit. It is an important period for the formation and yield of fruits and vegetables, especially vegetables such as eggplant, melons and beans, which bear fruit for many times and are harvested one after another, but the nutritional growth is still vigorous, and the cultivation needs a lot of fertilizer and water.