The temperature is rising these days, summer is coming, and it is another season to eat watermelon. Watermelon is simply a life-saving artifact in the summer, and it is inseparable from it every day. Watermelon is arguably the most popular fruit in summer, so many farmers grow this watermelon every year.
Every ripe watermelon is inseparable from the careful cultivation of farmers. During the planting process, we can often see farmers putting a flat stone on top of watermelon, especially in watermelon planting bases in the northwest region, why is this? Is it because you are afraid that the watermelon will run away, and press the watermelon with a stone, so that the watermelon will not run away? Why should watermelons be "pressed"?
<h1 class="pgc-h-arrow-right" data-track="4" > stone is related to the growth characteristics of watermelon</h1>
There are generally two kinds of watermelons that are more common in the market, one is very round like a basketball, and the other is oval and very large. Round watermelons are generally not pressed by stones, allowing the nature of watermelons to grow. This type of watermelon is generally planted in the southern countryside and other places. When farmers grow this type of watermelon, they do not press stones, but they will spread thick straw on the fruit of the watermelon. Because the weight of the straw itself is relatively light, there is no way to change the shape of the watermelon, and the watermelon can still grow in one direction.
Unlike the round watermelon in the south, the northwestern pressed sand melon, the shape of the melon is oval and somewhat similar to the shape of the winter melon. This type of watermelon will press a flat stone on the watermelon during the planting process. The weight of the stone is pressed on the watermelon, and the watermelon will feel difficult to grow upwards, it will not grow upwards, it will only grow to the left and right. In this way, the watermelon gradually develops from a circle to an oval, and after a period of time, the watermelon completely becomes an oval.
The two shapes of watermelon are actually not much different in taste, but the oval watermelon may be larger and heavier, and the price of a single fruit is also higher at the same price. Therefore, pressing a stone on top of the watermelon, the southern watermelon growers can also learn from it, but due to the influence of the southern climatic conditions in order for the fruit to grow larger, the pressing stone may not be suitable, but you can find a substitute for the stone.
It is related to the climatic conditions of watermelon cultivation
When the watermelon had just borne fruit, the fruit was relatively small. The northwest region is more windy at night, and it is easy to blow these young fruits off the melon seedlings. If you press a stone on the fruit, you increase the weight of the fruit, so that even in windy weather, it is not easy to blow the fruit away, and there will be no economic loss due to weather reasons.
In the same way, watermelons are planted in the south and laid straw mainly because the climatic conditions are different from those in the northwest. The climate in the southern region is relatively high, especially in the spring and summer seasons, there will often be a shower of rain, and then a very fierce sun, the temperature is particularly high. At this time, if there is no straw to cover it, many young fruits may be sunburned.
According to the different climatic conditions in which watermelons are planted, the growers adopt different planting methods in the planting process, especially the modern farmers, who are not simply planting, but also continue to learn new knowledge and master new planting information in the planting process. In this way, we will not be eliminated by this era.
<h1 class="pgc-h-arrow-right" data-track="18" > rapidly maturing</h1>
Ultraviolet light in the Northwest is much stronger than in the South, and the sun shines for a long time during the day. But at night, because the land is sparsely populated, it is not as mountainous as in the south, so the temperature drops quickly. It may be more than thirty degrees celsius during the day and only more than ten degrees at night. At this time, placing stones on the watermelon plays a role. During the day the watermelon on the stone assists the watermelon to absorb ultraviolet rays and heat together, increasing the speed of photosynthesis. This way the watermelon can accumulate more sugar during the day, and the ripe watermelon will be more delicious. By the evening, the surrounding climate had dropped, but because the stones absorbed enough heat during the day, this heat was supplied to the watermelon at night to prevent it from freezing.
From this point of view, it is best to place stones on watermelons with pebbles, absorb heat quickly, and the heat preservation effect is also good. However, in the southern region, because the temperature difference between day and night is not large, there is no need for cobblestone assistance. And because the sun is so fierce in the summer in the southern region, if the stone is pressed on the watermelon, the stone that absorbs a lot of heat may burn the watermelon. From this point of view, the cultivation of watermelons in the southern region is not suitable for pressing stones on watermelons. But you can press some to absorb heat not fast. Heat dissipation effect is something that is better for objects.
And in some places, pressing stones on watermelons can also prevent some birds from pecking at watermelons, and birds may think that these are traps to catch them when they see these stones, so they dare not fly down and peck at watermelons.
In addition, farmers can also compare with the stone to see how big the watermelon is, how it grows, whether it needs additional fertilizer and so on. In short, don't underestimate the stones pressed on the watermelon, which is the crystallization of the farmer's wisdom.