How to deal with plants that grow long and do not set fruit in spring
After the spring, the temperature generally rises. In fine weather, the walls and soil in the shed will store a lot of heat during the day. After the shed is put in the evening, this heat will gradually be released, making the night temperature too high, causing the vegetables to grow long and fruit-bearing. Fewer phenomenon.
From the physiology of vegetables, the leaves perform photosynthesis during the day to synthesize and store organic nutrients, while at night, they decompose organic nutrients through respiration to supply their own vegetative growth. The higher the night temperature, the stronger the respiration and the more organic products that are decomposed, the more plants tend to grow vegetatively. This is the reason why plants grow under high temperature and weak light. At the same time, due to the large consumption of organic nutrients, flower buds and fruits do not get enough nutrient supply, which is manifested as falling flowers and fruits, and more deformed fruits, which is what vegetable farmers often say "light long trees do not set fruits". In addition, when the humidity in the shed is high, the higher night temperature is also conducive to the occurrence of bacterial diseases. So, how should vegetable farmers control the night temperature and promote the normal growth of vegetables?
Reasonably let the wind regulate the night temperature
At present, vegetable farmers should adjust the opening and closing time of the tuyere according to the weather conditions, the insulation of the shed and the types of vegetables grown to avoid excessive night temperature and reduce respiratory consumption to promote reproductive growth. In fine weather, the vegetable grower can close the vent when the temperature of the shed drops to about 18℃. For planting bitter gourd, loofah and other temperature-loving vegetables, the vegetable grower can turn off the wind when the shed temperature drops to 20℃ and put the shed at 18℃. For vegetables such as peppers and eggplants, the air-closing opening and the shed time should be extended appropriately, and the air can be turned off at around 17°C and the shed can be kept at around 15°C.
Strengthen management and defense
In order to prevent the plants from growing excessively, the fertilizer and water can be controlled appropriately according to the growth of the plants, especially the vegetables in the early growth stage, such as the spring cucumbers before setting the melon, and the fertilizer should not be flushed or less fertilizer, so as to promote the root system and cultivate strong trees. If the vegetable grows excessively during the fruit-setting period, the vegetable grower can keep more fruits and pick it late at the right time, which can inhibit the vigorous vegetative growth and promote the transformation of the plant from vegetative growth to reproductive growth.
Spraying plant growth regulators to aid growth
When the plant grows more severely or physical measures are difficult to control, you can spray plant growth regulators to control the growth and balance the vegetative growth and reproductive growth of the plant. For example, foliar spraying mesoquat 750 to 1000 times, it is necessary to pay attention to: The concentration of growth regulators must be controlled well, and do not spray continuously, so as not to over-control and affect the normal growth of vegetables.
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