First, the planting density should be reasonable when the bean seedlings just opened the leaves for the best colonization age. 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.
Second, the temperature difference between day and night to Guanyin 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.
Third, the light conditions should be suitable for cultivation of the greenhouse varieties of beans, although the requirements of the light hours is not strict, but the light intensity requirements are relatively high, especially during flowering and sitting, if the lack of light can cause the beans corner flowers.
Fourth, the soil moisture and nutrients should be appropriate to the local soil moisture, flexible watering time and watering. The basic phase of the whole growing period of beans should be poured into three waters: the first watering after planting must be done thoroughly, otherwise the plants are uneven; when the vine grows to 0.6 meters high, the second water is poured; bean production The key is that the beans are not poured, and the water is not suitable for watering at 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 flowering and sitting on the beans. . 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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