First, the planting density should be reasonable. When the heart of the bean seedlings is just unfolded, it is the best seedling age. The reasonable line spacing of beans is generally 60 cm in small rows, 80 cm in large rows, and 1.8 to 2 meters in height. The higher the row spacing, the larger the spacing should be. The plant spacing is about 45 cm, which is generally fixed for two plants. If the planting density is too large, it will cause the beans to grow in the pods.

Second, the temperature difference between day and night should be to control the heat resistance of the beans, not tolerate the freezing, suitable growth temperature is 20 ° C ~ 25 ° C. During the flowering period of the beans, the daytime temperature, nighttime temperature and temperature difference between day and night should be mastered. The suitable growth temperature of the bean flowering period should not exceed 30 °C during the day and 18 °C during the night. Therefore, it is reminded that all the bean growers should put the shed time on the shed. It is necessary to delay the shed time with the increase of the temperature. The standard for sheds in the pods is 17 °C.

Third, the lighting conditions should be suitable for greenhouse cultivation of bean varieties Although the requirements for light hours are not strict, but the light intensity requirements are relatively high, especially during flowering and sitting pods, if the light is insufficient, it will cause the beans to fall into the pods.

Fourth, the soil moisture and nutrients should be appropriate according to the local soil moisture, flexible control of watering time and watering. The most basic of the bean growing season should be poured with three waters: the first watering after planting must be poured, otherwise the plants are uneven; when the vine grows to 0.6 meters high, the second water is poured; the bean production The most important thing is that the beans are not poured, and the water is not suitable for watering during the flowering period of the beans. Therefore, the third water should be poured before the initial flowering period, and combined with watering and spraying to promote the fruit and fruit preserver, which is more conducive to the flowering of the beans. . After sitting on the pod, you should pour a small amount of water to promote the expansion of the beans. In addition, nitrogen fertilizer should not be applied, otherwise it will cause the bean vine leaves to grow and cause flowering and sitting pod delay. Phosphate fertilizer should be added to promote the formation of nodule and enhance its nitrogen fixation ability.

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