Cause: Solar greenhouse insulation is used when there is a difference between deep winter and early spring. In winter, heat is used for heat preservation to meet the normal growth of vegetables. As the weather turns warm in the spring, we must evacuate part of the insulation and maintain a temperature difference of more than 15°C between day and night. Add appropriate moisture and nutrients to ensure the normal growth of vegetables. Most growers couldn't distinguish the difference between deep winter and early spring. In the late afternoon, they took off the tuyere in the evening and put grass in the evening. Even after the haystacks were placed, the temperature did not change at night, resulting in long stems and leaves, and the commodity rate of the cucumber was low. The output is not high. Response measures: Before and after the “spring equinox†in the greenhouse, evacuation of 1/5 to 1/3 straw or insulation is required, depending on local temperature changes, and maintain a temperature difference of around 15°C between day and night. Strengthen the management of fertilizers and waters. When the light is strong and the temperature is high, shorten the interval between watering and watering. Alternatively, the frequency of top dressings and fertilizers should not be too high. According to the amount of picking cucumbers, 10 to 15 days 1 Times, each application of compound fertilizer 15 ~ 20 kg. It is important to pay attention to watering on sunny mornings and avoid the occurrence of downy mildew and epidemics after watering. For the management of multi-storied large arch sheds, a two-layer membrane is placed in the front of the “Guyu†greenhouse. The middle arch shed should not be removed prematurely to prevent the effects of “cold spring†and low-temperature cold flow, and the minimum temperature in the shed should be kept at 10 in the morning. °C or more. However, do not exceed 32°C at noon. Increase the amount of air when the temperature is high. Disclaimer: Some articles in this website have been transferred from the Internet. If you are involved in third party legal rights, please inform this website. phone
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Cucumbers in spring greenhouse common problems
In spring, as the temperature rises, the solar greenhouse vegetables enter a vigorous growth period. However, if the management is not good, the cucumbers in the solar greenhouse often appear to be prosperous, leggy, skewed in melon, long in melons, and many in curved guava, which has a certain impact on production.