First of all, the colonization density of the beans should be reasonable, and the bean seedlings are the best colonization period when the heart leaves are unfolded. Reasonable line spacing is generally 60 centimeters in small rows, 80 centimeters in height, and 1.8 to 2 meters in height. The higher the row spacing should be, the greater the spacing should be. The spacing is about 45 centimeters, and it is generally planted in pairs. If the colonization density is too large, it will cause bean plants to grow indefinitely.
Second, the temperature difference between day and night should be checked. The beans have strong heat resistance but are not tolerant to freezing. The suitable growth temperature is 20°C to 25°C. In the flowering stage of the bean pods, the day and night temperatures and the temperature difference between day and night should be mastered. The flowering period of beans should not exceed 30°C during the day and 18°C ​​at night. Therefore, it is necessary to postpone the shed time as the temperature rises. The standard for putting sheds in flowering pods is 17°C.
The third is to increase lighting. Although the varieties of beans grown in greenhouses do not require strict light hours, they require relatively high light intensity. Especially during flowering, if the light is insufficient, the bean corners will cause flower failure.
The fourth is the skillful application of water. The whole growing period of beans should be poured at least three times: after the first watering after planting, it must be thoroughly irrigated; otherwise, the plants will be uneven; when the vine grows to 0.6 meters high, the second water will be poured; The bean is not poured and it is not suitable for watering in the flowering stage of the bean. Therefore, the third water should be poured before the first flowering period and combined with the watering spray to promote the flower and fruit protection agent, which is more conducive to the flowering and sitting of the bean. After sitting, you should pour a little water again to promote the expansion of beans.
Beans can not be partial nitrogen fertilizer, otherwise it will cause the beans vine leaves long and cause delay in flowering sitting, should increase phosphate fertilizer, in order to promote the formation of root nodules, enhance their nitrogen fixation capacity.
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