Bean greenhouse cultivation technology
Kidney beans, also known as green beans and cowpeas, are annual vegetables that are served in tender pods. The bean is native to Central and South America. It is cultivated in all parts of the country from north to south. In addition to open field cultivation, the bean can be produced in greenhouses and other protected facilities. 1 Growth and development requirements for environmental conditions
1.1 Requirements for temperature conditions Kidney beans are warm, not heat resistant or frost resistant. The suitable temperature for seed germination is 20-25 ° C, and it is not easy to germinate below 8 ° C and above 35 ° C. The seedlings grow at a suitable temperature of 18-20 ° C, and stop growing below 13 ° C. The suitable temperature for flowering and pod-forming period is 18-25 °C, and below 15 °C, above 27 °C, no pods can be formed, and the phenomenon of falling flowers and pods occurs. At the same time, the soy bean needs 700-800 °C accumulated temperature from sowing to flowering. Below this effective accumulated temperature, even if the bean plants bloom, they will not pod, so in the early spring cultivation, the sowing period cannot be premature.
1.2 Requirements for light conditions The growth and development of kidney beans is not strict with the length of sunshine, that is, it can bloom under long sunshine or short sunshine. Therefore, as long as the temperature conditions permit, the bean cultivation can be carried out. However, the growth of kidney beans, flowering and pods require strong light. If the light is insufficient, it is prone to grow up, fall and fall, which should be paid attention to in early spring cultivation.
1.3 Requirements for water conditions Kidney beans are moist and also drought-tolerant, but not resistant to cockroaches. During the whole growth period, the suitable soil temperature is 60%-70% of the soil field water holding capacity. If the soil moisture is insufficient, the flowering is delayed, the number of pods is small, and the pods are small. Seed germination requires sufficient water, but if the moisture content is too high, it is easy to rot, so it is generally not suitable to water when the beans are sowed.
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