Now the development of science and technology has provided more and more convenience for people's life. In the past, people had to wait until the season to eat any fruit. But now, no matter what season, there are all kinds of fruits in the supermarket. They don't need to wait until the season to eat the fruit they want. However, many people have many misunderstandings about off-season fruits. Some people think that off-season fruits are unhealthy, and some people think that off-season fruits have no nutrition. Is that really the case? What is the difference between out of season fruits and seasonal fruits? Is out of season fruit unhealthy? This article brings you the introduction of out of season fruits. Let's have a scientific understanding of out of season fruits.
'out of season fruit' usually has three forms. First, long-term preservation. With the rapid development of long-term preservation and preservation technology of fruits and vegetables, it is very easy to save 'seasonal' fruits and vegetables to winter. For example, in warm seasons, some common fruits such as bananas, grapes, apples, oranges and pineapples are preserved until winter by using refrigeration and other preservation technologies, which can almost meet the supply of the whole year. The second is' greenhouse planting '. In the cold winter, the greenhouse is still as warm as spring. Fruits and vegetables can grow and bear fruit normally to meet people's needs. This is also a very common practice at present. Third, planting in different places. Plants are out of season in one place, but just in time in another. For example, many vegetables are out of date in Beijing in winter, but they are full of vitality in southern areas such as Guangdong and Hainan. Due to the warm climate in these places, even in winter, there are still many fruits and vegetables that can be planted, all of which belong to the local seasonal fruits and vegetables.
Others will say that many pesticides are used in off-season fruit cultivation, which is harmful to health. In fact, even seasonal fruits use pesticides in the planting process, which does not mean that out of season fruits are more harmful. Moreover, as long as it is standard planting, normal consumption will not harm human health.
Others believe that off-season water saving fruits need plant hormones, which will make human nature precocious. In fact, whether it is out of season or seasonal fruit, a certain amount of plant growth regulators, that is, plant hormones, will be used in the process of modern planting. In addition, all fruits naturally contain a certain amount of plant hormones.
However, the efficacy of plant hormones is generally very low, which is different from the molecular structure and action mechanism of human hormones, and will not have adverse effects on the human body. Due to the strong self limitation of plant hormones, normally grown fruits will not be added too much.
Another public concern about out of season fruits is that they are poor in nutrition.
Indeed, there may be some differences in the nutritional value between off-season fruits and seasonal fruits. However, these differences do not mean that they are not nutritious, let alone harmful. Moreover, from the perspective of nutrition supply, if people do not eat fruit in cold winter, it will have a greater impact on human health. Therefore, eating off-season grapes in winter is much more nutritious than 'eating without grapes'.
Many people think that out of season fruit tastes bad. As there may be differences in the content of some nutrients between off-season fruits and seasonal fruits, there are still some differences in taste. In addition, the fruits and vegetables planted in the greenhouse are not as good as those grown under natural conditions in terms of sunshine duration and intensity. Sunshine will affect the synthesis of sugar and vitamins in fruits and vegetables. Therefore, the sugar and vitamin content of off-season fruits and vegetables will be slightly lower than that of similar seasonal fruits and vegetables, which is why most off-season fruits and vegetables taste lighter. However, this taste difference actually has little impact on the whole, and will not make the fruit harmful to health. You can eat it at ease.
In fact, plant growth is nothing more than light, temperature, water and fertilizer. As long as the conditions are suitable, it will grow in any season. In fact, out of season fruits and vegetables are not so bad. Compared with winter without fruits and vegetables, out of season fruits are still very helpful for people to obtain and supplement nutrition, especially vitamins and minerals.