The causes and preventive methods of the hollowness of the latest watermelon

Watermelon is one of the seasonal fruits in summer. It has high moisture content and sweet taste. It is loved by people. However, sometimes we will find that watermelon is hollow after cutting it. How is this going on? In fact, watermelon hollow for growers is also a headache problem, how to prevent it? Let's take a look at the detailed introduction.

1. Low temperature

The optimum temperature for watermelon growth during flowering and fruiting period is between 25-30 ℃, and the lowest average temperature is between 20-21 ℃. When watermelon cells begin to separate after fruiting, fruits begin to expand. However, if the temperature of watermelon is low when it is fruiting, the cell division speed becomes slow, so that the number of cells is insufficient, and with the temperature rising, the pericarp begins to expand, and the flesh cells are insufficient, which cannot fill the fruit space and thus hollow phenomenon occurs.

Prevention method: When watermelon blossoms and sets fruit, we must do a good job of temperature control, so that the temperature is maintained at an appropriate limit, not high or low, so that it grows normally.

2. Little rain

Fruit growth and development is inseparable from nutrients, if more rainy days during fruit development, less light, watermelon leaves photosynthesis will be affected, resulting in insufficient synthetic nutrients. This causes the cell division of the flesh to weaken, affecting the flesh volume, but in the case of insufficient nutrition of the fruit, the pericarp will still grow normally, so it forms a hollow. In addition, partial application of nitrogen fertilizer and excessive watering cause excessive plant growth and field closure, which will also affect photosynthesis, and stem and leaf growth will compete with fruit for water and fertilizer, and hollow will also appear.

Prevention methods: in the long-term rainy days to timely drainage, reduce the humidity in the field, so as to avoid excessive growth of stems and leaves, leaf photosynthesis affected, synthetic nutrient capacity weakened, then you can take foliar fertilizer spray way, to maintain nutrients. At the same time, attention should be paid to the application of nitrogen fertilizer, in the prevention and control of excessive plant growth, excessive stem and leaf should be removed in time, so as not to compete with fruit for water and fertilizer.

3. Lack of water

In the fruit development process not only need sufficient nutrients, but also need enough water, if in the fruit expansion period serious water shortage, fruit cells can not expand and form hollow.

Prevention method: In the fruit expansion period can not lack water, to frequent watering, keep the soil moist, but not water, so as not to crack fruit, can take drip irrigation.

4. Untimely harvesting

When watermelon is not harvested in time after maturity, nutrients and water will flow backwards, so the fruit will form hollow due to loss of water and nutrients, which is common in varieties with faster fruit development.

Prevention method: harvest in time after fruit ripeness, so as to avoid water and nutrient backflow, causing unnecessary loss.

The above is the watermelon hollow reasons and prevention methods introduced, I hope to help you, want to know more about the relevant knowledge, please pay attention to us.