Causes and preventive methods of watermelon hollowness

Watermelon is one of the summer fruits with high moisture content and sweet taste, so it is loved by people, but sometimes we will find that the watermelon is hollow after we cut it open. What's going on? In fact, watermelon hollowness is also a headache for growers, how to prevent it? Let's take a look at the detailed introduction.

1. The temperature is low.

The suitable temperature for the growth of watermelon during flowering and fruit setting period is between 25 and 30 degrees, and the lowest average temperature is between 20 and 21 degrees. When the cells of watermelons begin to separate after fruit setting, the fruit begins to expand. However, if the temperature of watermelon is low during fruit sitting, the rate of cell division becomes slow, so that the number of cells is insufficient, and with the rise of temperature, the pericarp begins to expand, while the pulp cells are insufficient, which can not fill the fruit space, resulting in hollow phenomenon.

Prevention method: in the watermelon flowering and fruit setting must do a good temperature control, so that the temperature is maintained at the appropriate limit, neither high nor low, so that its normal growth and development.

2. Lack of sunshine

The growth and development of fruit is inseparable from nutrients. If there are more overcast and rainy days and less light during fruit development, the photosynthesis of watermelon leaves will be affected, resulting in a lack of synthetic nutrients. It leads to the weakening of the cell division of the pulp, affecting the pulp volume, but in the case of insufficient nutrition, the pericarp will still grow normally, so the hollow will be formed. In addition, excessive application of nitrogen fertilizer and excessive watering will lead to excessive plant growth, field closure and other phenomena, which will also affect photosynthesis, and the growth of stems and leaves will compete with the fruit for water and fertilizer, and there will also be hollow.

Prevention methods: in long-term rainy days, timely drainage, reduce field humidity, so as to avoid excessive growth of stems and leaves, leaf photosynthesis is affected, the ability to synthesize nutrients is weakened, and foliar fertilizer spraying can be adopted to maintain nutrients. At the same time, we should pay attention to the application of nitrogen fertilizer, in the prevention and control of plant overgrowth, for overgrowing stems and leaves should be removed in time, so as not to compete with fruit for water and fertilizer.

3. Lack of water

In the process of fruit development, not only sufficient nutrients, but also enough water is needed. If the fruit is seriously short of water during the fruit expansion period, the cells of the fruit can not expand and form a hollow.

Preventive measures: in the fruit expansion period can not be short of water, should be watered frequently, keep the soil moist, but should not be watered by flood irrigation, so as to avoid fruit cracking, drip irrigation can be adopted.

4. The harvest is not timely.

If the watermelon is not harvested in time after ripening, the nutrition and water will flow back, so the fruit will form a hollow because of the loss of water and nutrients, which is more common in the varieties with rapid fruit development.

Prevention: harvest the fruit in time after ripening, so as to avoid reflux of water and nutrition, resulting in unnecessary loss.

The above is the introduction of the reasons and prevention methods of watermelon hollowness. I hope it can help you. If you want to know more about it, please follow us.