The colonization density should be reasonable: the best colonization age is when the leaves of the bean seedlings have just been unfolded. The reasonable row of beans is generally 60 centimeters small row, 80 centimeters large, 1.8 to 2 meters high, the higher the row spacing should be greater, the spacing of 45 centimeters or so, usually two plants colonization. If the colonization density is too large, it will cause bean plants to grow indefinitely.
Temperature difference between day and night to check: beans, heat resistance, intolerance of borrowing, the appropriate growth temperature of 20 °C ~ 25 °C. In the flowering stage of the flowering beans, the daytime temperature and nighttime temperature and the temperature difference between day and night should be mastered. The optimum growing temperature during the flowering period of beans should not exceed 30°C during the day and 18°C ​​during the night. Therefore, to remind the bean growers to put a good shelf time this time, with the temperature increase and postponed the shelf time, the bean flowering sit the shelf standard for the shelf temperature reached 17 °C.
The lighting conditions should be suitable: Although the varieties of beans suitable for growing in greenhouses are not strict with respect to the number of hours of light leakage, the light intensity requirements are relatively high. Especially during flowering and sitting, if the light is insufficient, the corners of the beans will cause flower failure.
The soil moisture and nutrients should be appropriate: The time and amount of watering should be flexibly determined depending on the local soil moisture. The basic phase of the whole growing period of beans should be poured into three waters: after watering for the first time after planting, it must be thoroughly irrigated; otherwise, the plants are uneven; when the vine grows to 0.6 meters high, the second water is poured; The most crucial point in the production of beans is the pouring of beans without watering, and it is not suitable for watering in the flowering stage of the beans. Therefore, the third water should be poured before the first flowering period and combined with water spray to promote flower and fruit protection agent, which is more conducive to bean flowering. Take a ride. After sitting, you should pour a little water again to promote the expansion of beans. In addition, can not be partial nitrogen fertilizer, otherwise it will cause beans leg vine leaf lengthened and cause delay of flowering sitting, should increase phosphate fertilizer, in order to promote the generation of root nodules, enhance their nitrogen fixation ability.
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