Latest Reasons Why Greenhouse Zucchini Fails to Swell Fruit and Solutions
When growing zucchini in a greenhouse, the fruit is prone to failing to swell after setting. This is a very headache-inducing problem for farmers. If the fruit does not swell, no matter how many fruits are set, it is meaningless. So why does greenhouse zucchini fail to swell fruit? How should it be solved? Let's take a look together with the editor.
1. Excessive vegetative growth
Generally, zucchini plants that fail to swell fruit commonly show excessive vegetative growth. The nutrients a plant absorbs are limited. If vegetative growth is too vigorous, reproductive growth will inevitably be affected, causing the zucchini to fail to swell fruit. Therefore, during the zucchini seedling stage, work to control excessive growth must be done well. In addition to using growth-control agents, adjustments can also be made in terms of fertilizer, water, and temperature. Zucchini has relatively strict temperature requirements. Generally, it needs to be kept at 18-22 degrees during the day and 13-15 degrees at night. If the temperature is too high, especially if the night temperature is too high, excessive growth is very likely to occur, so the temperature must be well controlled. In addition, on the basis of applying sufficient base fertilizer, after the seedlings have recovered, be sure not to apply too much nitrogen fertilizer as a topdressing, because nitrogen fertilizer can very easily cause the plants to grow leggy. During the fruit-swelling stage, a high-potassium fertilizer can be appropriately applied as a topdressing.
2. High concentration of flower-dipping solution
The concentration of the flower-dipping solution should change with temperature: when the temperature is high, the concentration should be low, and when the temperature is low, the concentration should be high. If zucchini fails to swell fruit because the concentration of the flower-dipping solution is too high, then at this time it is necessary to increase the amount of watering, and at the same time spray gibberellin or cytokinin mixed with brassinolide to alleviate it, so that it can grow and develop normally.
3. Low temperature and insufficient light
When zucchini is under low temperature and insufficient light, not only does growth and development slow down, but nutrient synthesis and transport are also hindered. During the day, the photosynthetic synthesis of nutrient products is insufficient, nutrient supply is insufficient, and low temperature causes cells to stop elongating, resulting in failure to swell fruit or fruit abortion. Therefore, it needs to be solved by preserving heat and increasing light. On sunny days, pull up the greenhouse cover early and close it late to extend the lighting time. On cloudy and rainy days, when temperature permits, appropriately pull open the straw mats to let light through, and also promptly wipe the greenhouse film to increase the time and amount of light the vegetables receive.
The above is an introduction to the reasons why greenhouse zucchini fails to swell fruit and the solutions. We hope it can help you. To learn more related knowledge, please keep following us.