A common mistake is randomly adjusting the light angle of a greenhouse. The orientation and structure of a greenhouse, especially when growing cucumbers, should be carefully planned and maintained over time. Factors such as the north-south span, height, and slope angle of the back wall must not be altered arbitrarily, as they directly affect light exposure and plant growth.
Another mistake is applying excessive fertilizers during planting. Chemical fertilizers, particularly nitrogen-based ones, can release harmful gases under hot and humid conditions. If concentrated in planting furrows, they may burn the roots of cucumber plants, leading to poor growth or even plant death.
A third error is planting too deep. Many farmers now use grafted seedlings to improve disease resistance. However, if the grafting point is buried too deeply, the plant may produce new roots from the scion, which weakens the grafting effect and reduces its ability to resist diseases.
It's also a mistake to leave the greenhouse covered on rainy or snowy days. Some people believe that rain or snow will lower the temperature, so they don’t open the vents. In reality, the lack of sunlight combined with prolonged cold can cause physiological issues in cucumbers, potentially leading to plant death in severe cases.
Applying nitrogen fertilizer in winter is another common mistake. During decomposition, nitrogen fertilizers can significantly lower soil temperature, which hinders the growth of cucumber roots and affects overall plant development.
Using unripe organic fertilizer is another pitfall. When exposed to high temperatures, uncomposted manure can ferment quickly, releasing large amounts of ammonia. This can harm cucumber seedlings, sometimes even causing them to die in severe cases.
Spraying pesticides at noon or in the evening is also discouraged. At noon, high temperatures cause rapid evaporation of water from leaves, reducing the effectiveness of the pesticide. In the evening, moisture prevents proper absorption, leading to reduced efficacy and increased risk of disease outbreaks.
Planting too low can also be problematic. If the plants are too close to the ground, it can reduce light exposure, affecting fruit development and overall yield.
Growing cucumbers and tomatoes together in the same greenhouse is not recommended. Both crops release root exudates that can inhibit each other’s growth. This mutual inhibition can lead to reduced yields, lower quality, and less profitability. Additionally, both crops are vulnerable to pests like aphids, and an infestation in one can easily spread to the other.
By avoiding these common mistakes, farmers can ensure healthier cucumber plants, better yields, and more sustainable farming practices.
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