Cucumber long leaves do not grow melon is very worried about how to prevent cucumbers do not bear melon

Cucumber fertilization

First, the cause of occurrence:

1. Leave many melons. All melons that can sit are kept, and the cucumbers are not removed from the excess female flowers.

2. Improper fertilization. The excessive use of compound fertilizer makes the concentration of soil solution too high, weakens the root absorption and affects the growth.

3. Overdose. Most vegetable farmers pay attention to chemical control, but ignore agricultural measures, so that the interval between drugs is short, the concentration seriously exceeds the standard, resulting in excessive fungicides, the formation of drug damage, coupled with random spraying of hormone pesticides, resulting in physiological disorders of cucumber, can not grow normally.

4. Improper watering. Watering does not pay attention to the weather and does not follow the growth law of cucumbers. Such as continuous overcast days, low temperatures, strong cold snap and other weather after watering, so that the ground temperature is lower than 12 ℃, and the soil relative humidity is higher than 85%, resulting in cucumber retting roots, thus limiting the root growth and having a great impact on the upper growth.

5. The harvest is not timely. Due to the unstable price of melons, sometimes in order to wait for the high price, the already grown melons are left on the seedlings, resulting in "falling seedlings". The result is that the balance between vegetative growth and reproductive growth of cucumber is broken, and the organic nutrition in the body is consumed too much.

2. Preventive measures:

1. Fall the vine properly. When the cucumber falls off the vine, one time should not be too low, too low is not conducive to the normal growth of cucumber. After falling the vine, the cucumber plant is maintained at about 1.5 meters, ensuring that there are more than 15 functional leaves in order to ensure normal photosynthesis and maintain normal growth.

2. Pay attention to thinning flowers and fruits. For cucumbers with many sitting melons, it is necessary to properly sparse melons and leave them without seeing melons, otherwise it is easy to cause seedlings to rest in the middle and later stages. The yellowing leaves at the bottom should be removed in time to reduce consumption.

3. Strengthen the management of light on continuous overcast days. When the cloudy day is close to noon, if the grass grass is opened for another 2 hours, it will not reduce the greenhouse temperature, but will increase by 2 ℃. After it suddenly clears up on a cloudy day, you can't suddenly uncover all the grass, but should "uncover the flowers" so as not to cause "flashing seedlings".

4. Pay attention to fertilizer and water management. When the temperature is low and the light is weak, the watering times should not be too frequent. Generally, they should be watered once every 20 days. Also note that after watering, it is necessary to wait for the shed temperature to rise to more than 30 ℃ before releasing the air, and the tuyere should be from small to large, not too large at one time, resulting in the phenomenon of flashing seedlings. Fertilizer flushing with water, to be easily absorbed by cucumbers containing humic acid or amino acid fertilizer, one-time dosage should not be too much.

5. strengthen the prevention and control of diseases. Due to the untimely release, cucumber is prone to drug damage after administration in the shed, so the concentration should be strictly controlled and the mixture of three or five pesticides should not be mixed to reduce the occurrence of drug damage.