Now is the season for melons to be marketed in large quantities, and the price market is very good. Farmers friends have opened their hearts to flowers, but recently many vegetable farmers have reacted to melon cracking. The phenomenon of melon cracking is very serious, which seriously affects the yield and quality of melons, causing serious economic losses. Arouse everyone's attention, find out the reason for cracking melon and how to prevent it in advance is very important!

Melon split melons generally split longitudinally from the fruit stem to the umbilical depth of the fruit, and the flesh is exposed. Generally, they occur more frequently during the two stages of young melon expansion and fruit enlargement. The fundamental reason for the melon is that the growth of the fruit inside is faster than the peel tissue Part of the growth rate is fast, caused by excessive internal expansion pressure. Therefore, it is necessary to strengthen the field management of melons, create conditions conducive to the growth of melons, and prevent the occurrence of cracked melons. Let's analyze the causes of cracked melons and how to effectively prevent them.

cause

1. Variety reasons

Some melon varieties have the characteristics of thin skin and crispy skin. When the growth process is greatly affected by the external environment, it is very easy to cause the phenomenon of split melon.

2. Improper temperature management

When the melon plant transitions from vegetative growth to reproductive growth, the female flowers open to the stage of swelling of the young melon, and the ovary cells begin to divide rapidly. If the climate outside the greenhouse changes suddenly during this period, such as continuous rainy weather, large temperature difference between day and night, continuous high temperature and high humidity weather , Even cloudy and sunny weather can cause uncoordinated flesh growth, hardened skin and slow growth, causing melon cracking. In the late growth period, the ventilation is too late, the ventilation opening is too large, and the temperature changes quickly, which also easily causes the melon skin to become brittle.

3. Deficiency

Melon lacks medium and trace elements during the growth process, and the lack of medium and trace elements such as calcium and boron in the soil can cause melon cracking.

4. Humidity effect

Before the female flowers of thin-skinned melons opened, some melon farmers over-controlled watering in the shed due to the fear of affecting the sitting rate of melons, causing the plants to lack water, the air humidity was small, and the fruit epidermis hardened. When watering is too much after sitting on the melon, the fruit expands sharply after absorbing the water, so that the growth of the young melon's epidermis cannot keep up with the growth of the flesh and crack the melon.

5. Improper fertilization

During the fertilization process, excessive application of nitrogen, phosphorus, and potassium fertilizers inhibited the absorption of trace elements such as boron and calcium, resulting in thinning of the peel cell wall, which is easy to cause melon cracking.

6. Improper use of hormones

When using hormone dipping flowers in the melon management process, excessive hormone concentration or repeated dipping of flowers will cause the aging of the fruit epidermis, affecting the normal expansion of young melons and the formation of cracked melons. If the swelling agent is used excessively, the fruit will rapidly expand and cause cracked melon.

Prevention

1. Choose excellent varieties

According to the local environment and stubble, choose varieties with strong resistance to planting.

2. Scientific temperature control

When cultivating melons in greenhouses, try to keep the temperature in the greenhouse at 25℃-30℃ during the day and 18℃-20℃ at night. When the temperature in the greenhouse is too low, hang two films in the greenhouse to increase the temperature. When the temperature is higher than 30℃, ventilate and cool down, and properly remove the two films in the shed.

3. Reasonable water and fertilizer management

Water reasonably according to the principle of "seeing the dry and seeing the wet". Maintain sufficient water before sitting on the melon. Pour the swelling water in time to promote the swelling of the melon fruit. Do not pour big water after the swelling. 7-8 days after sitting Fertilizer water should be poured. Bio-organic flushing fertilization should be used, and 1 kg of boron fertilizer should be flushed with water per acre. It can also be sprayed or flushed with calcium nitrate or fertile calcium during fruit expansion to promote fruit growth and prevent falling flowers and fruits. Try not to water or a small amount of water 7-10 days before picking, to avoid flooding, to prevent melon cracking.

4. Reasonable use of plant growth regulators

Scientific use of plant hormones, when using hormone dipping flowers, according to the dipping time and temperature, reasonable adjustment of the concentration of dipping anthers to avoid repeated dipping flowers.

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