Rainy and cold temperature guard against cucumber "flower topping"

“You see that my cucumber vines are not very good, but the cucumbers are blossoming, and almost every node has fruit, but in the last few days it has been found that it is not more than 1 meter high and it grows up. Wrapped at the tip, did not see the heart of the leaves, is not too much fruit, Fujiko can not stand ah?" Recently, melon farmers Zhang Lin anxiously asked the author.

“Your cucumber has a 'flower topping' phenomenon, and you must quickly take measures.” The author observed Lao Zhang’s cucumber garden and judged it with recent weather conditions. Lao Zhang's cucumber vines do not form the heart of the top of the heart, there is a "flower head" phenomenon, that is to form a flower cluster between female flowers and male flowers, is the "flower topping" typical symptoms.

"'Timing the flower' not only delays the development of the cucumber, but also affects the yield and quality. This kind of 'flower topping' is a type of nutritional disorder, mainly due to continuous low temperature and rainy weather in these days, and the night temperature is below 10°C. During the day, photosynthetic assimilation materials were transported, and the leaves turned dark green, the foliage was uneven, and the plants were short.We must take early measures to close the shed, strengthen the coverage, and increase the night temperature. The temperature requirement for the first half of the night should reach 15°C and maintain 4 ~5 hours, and about 10 degrees Celsius at the end of the night."

“In addition, the humidity in your shed is too high, causing root collapse phenomenon. Generally, the relative humidity of the soil is higher than 75%. The soil is damp and the growth of the roots is inhibited. It will also cause the root type of 'flower topping'.” Road. “In this case, we must also take measures to raise the temperature of the greenhouse to more than 10°C. When we find that the ground is exposed to grayish water, we must stop watering, cultivating in time, and do everything possible to increase the ground temperature and reduce soil moisture. In the weather, we must do a good job of draining water to prevent water accumulation in the shed."

“In addition, you can also top up a little bit of available nitrogen fertilizer to lift the seedlings, and remove the root melons, even part of the male and female flower buds, to promote vegetative growth and soon return to normal.” After hearing my suggestion, Lao Zhang finally got loose. Tone.