Spinach is a long-day crop. Under the condition of high temperature and long sunshine, plants are easy to blossom at jointing stage, and the requirements for sunshine intensity are not high, so they can be interplanted with tall crops. Spinach leaves have large area, soft tissue and high water demand. Sufficient moisture, thick meat when growing vigorously, high yield and good quality. Under the conditions of high temperature, long sunshine and drought, vegetative growth is inhibited, reproductive growth is accelerated, and premature bolting is easy.

2, high snow wheel

High snow wheels need plenty of sunshine in spring, summer and autumn. When the temperature is high, if it is maintained in direct sunlight, its leaves will obviously become smaller, its branches will become shorter, its soles will turn yellow and fall off, and its growth will be very slow or it will enter a semi-dormant state.

3. Little carrots

The growth of radish needs sufficient sunshine, strong plants, strong photosynthesis, more material accumulation, rapid expansion of fleshy roots and high yield. The photoperiod effect of radish belongs to long-day plants. Under the conditions of long sunshine (12 hours or more) and high temperature, flower bud differentiation and flower branch germination are faster.

4. Rice

Rice likes high temperature, high humidity and short sunshine, and has low requirements for soil, but paddy soil is the best. The lowest temperature of seedling germination is 10 ~ 12℃, and the optimum temperature is 28 ~ 32℃. The average daily temperature at tillering stage is above 20℃, and the optimum temperature for ear differentiation is around 30℃.

Low temperature prolonged the differentiation of branches and glumes. The optimum heading temperature is 25 ~ 35℃. The optimum flowering temperature is about 30℃, lower than 20℃ or higher than 40℃, and pollination is seriously affected.

5. Corn

Plants that can bloom only when the sunshine length is shorter than its critical day length (less than 12 hours, but not less than 8 hours). In a certain range, the longer the dark period, the earlier it blooms. If it is under long sunshine, it will only grow nutritionally without flowering. Many tropical, subtropical and temperate plants that bloom in spring and autumn are mostly short-day plants, such as soybeans, corn, rice and viola yedoensis.

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Baidu Encyclopedia-Longyangguang Plants