Wash strawberries and don't pick strawberry stems

It's strawberry season again. A red strawberry in the mouth, the sweet and sour juice bursts between the lips and teeth, and the soft and tender flesh "melts" in the mouth, which is too intoxicating! But the strawberry you eat, is it really washed?

Be sure not to remove the strawberry stem when washing strawberries!

As for how to wash strawberries in the most "clean", there are really people who have studied. The most critical action: Don't pick the strawberry stem!

The researchers selected representative Shuofeng strawberries from supermarkets, fruit stores, and roadside fruit stalls with 3kg each, and divided them into 8 parts on average, and compared the effects of different cleaning methods on pesticide residues in strawberry samples.

The results of the experiment showed that there was a significant difference between removing the strawberry stalk and not removing the strawberry stalk in removing pesticide residues, and the pesticide residues of the strawberries soaked after removing the strawberry stalk were relatively higher.

This is because if the stemmed strawberries are soaked in water, the residual pesticides will enter the fruit with the water, causing more serious pollution. In addition, the most recommended cleaning method is to rinse with clean water, then soak in clean water, rice washing water, light salt water, and baking soda for 5 minutes before rinsing.

Strawberries are actually summer fruits

Strawberries belong to a type of berry that is juicy and sweet and sour. I remember eating strawberries only in summer when I was a child, and I rarely saw them in winter, but now I can eat strawberries even in winter. Some people may wonder, "What season is the strawberry fruit?"

In fact, strawberries are the seasonal fruit of summer in nature. The optimum growing temperature is around 20°C. In general, when the soil temperature is 15°C-23°C, it is suitable for the growth of strawberry roots, and when the air temperature is 20°C-25°C, the effect of strawberry photosynthesis is the best. Therefore, strawberries cultivated in the open field are generally planted in August and September, and picked in May and June of the following year, when the weather conditions are most suitable for strawberry growth.

Here's the thing: strawberries are so delicious! In order to let everyone happily show off strawberries in winter, greenhouse strawberries came into being. At present, the planting area and consumption of strawberries in mainland China rank first in the world, and almost more than 90% of strawberry planting is realized in greenhouses. Strawberries are cultivated in greenhouses, generally starting to prepare in June and August, planting around September, picking and listing around New Year's Day, and the harvest period is as long as 3 months.

In winter, the temperature in the open air is low, which is not suitable for the growth of strawberries, and there is also a risk of freezing to death. Greenhouse planting can artificially control temperature and humidity, pollination and soil conditions to ensure the healthy growth of strawberries. So strawberries have changed from "summer fruits" to "winter fruits".

Some people say, "Isn't this an out-of-season fruit? It's not good for the body!"

In fact, out-of-season fruits and vegetables are now common, so there is really no need to worry. Strawberries are still relatively picky about the requirements of the growing environment, and temperature, humidity, moisture, light, etc. will affect the photosynthesis of strawberries, and then affect the quality of strawberries. Strawberries grown in greenhouses can artificially control these conditions to ensure that the photosynthesis of strawberries can be carried out normally, and the flavor and quality are good. As for the plant growth regulator that everyone is worried about, there is no harm to the human body when used normally, and as long as it is cleaned, it can be eaten with confidence.

Winter strawberries are sweeter, it's true!

There are also many friends who will find that strawberries in winter taste sweeter than those in summer, is this an illusion?

The sugars in strawberries include sucrose, glucose and fructose, with the contents of 0.47g/100g, 1.99g/100g and 2.44g/100g, respectively, of which fructose content is the highest. Fructose has a characteristic that the lower the temperature, the sweeter the taste, so strawberries will indeed be sweeter in winter.

Strawberries are not only delicious, but also nutritious

◎ Vitamin C When it comes to eating fruits, everyone is most concerned about whether vitamin C can be supplemented. The contribution of strawberries is quite large. According to the data in the "Chinese Food Composition Table", strawberries can provide us with 47mg of vitamin C per 100 grams. However, the vitamin C content will vary from variety to variety.

Eating 100g-200g of strawberries every day can basically meet the needs of the general population for vitamin C.

◎Dietary fiber The insoluble dietary fiber content of strawberries is 1.1g/100g, and the total dietary fiber content is 2g/100g, which varies slightly among different varieties.

◎Mineral potassium Although the potassium content of strawberries is not as good as that of bananas, it is 1.6 times that of apples, at 131mg/100g, which is beneficial for maintaining blood pressure.

◎Antioxidant content of strawberry is relatively high, about 2-11 times that of common fruits such as apple, citrus and kiwifruit. It contains bioactive components including total phenols, flavonoids, anthocyanins, etc., which have antioxidant and anti-inflammatory effects.

◎Low caloriesThe calories of strawberries are low among fruits, only 32kcal/100g, which is lower than blueberries, mulberries, apples, pears, peaches, kiwi and other fruits. Even those who need to control their weight or are losing weight can eat with confidence.

In addition, a recent study published in Nutrients mentioned that long-term consumption of strawberries in middle-aged people has the effect of reducing the risk of dementia, but the study used a daily supplement of 130g of strawberry powder.

About strawberries

Don't believe these rumors!

Is strawberry discoloration staining?

Strawberries have a thin and delicate skin, and a little violence when washing them may break the strawberry tissue, causing anthocyanins to escape, which is easily soluble in water, so the water will change color.

Are white strawberries genetically modified?

White strawberries are not genetically modified, but artificially bred varieties. At present, there are many varieties of white strawberries, such as Peach, Snow Angel, Xiaobai, Snow White, etc.

Is the deformed strawberry a hormone?

Strawberry hollow has nothing to do with hormones, it has to do with the variety of strawberries, the growing environment, etc. For example, varieties such as Sweet Charlie have a low flesh density and loose fruit, which may lead to hollowing, excessive use of nitrogen fertilizer during the fruiting period will also lead to hollowing, sufficient boron is needed for internal transportation of the fruit, and if boron is lacking, it will also cause hollowing, and insufficient nutrient supply or too late harvesting will also lead to hollowing.

In addition, the effect of clopyriurea on strawberry hollowness and malformation has been studied, and the results show that variety is the main factor leading to strawberry hollowing, and it is also a factor leading to strawberry malformation. Regardless of whether chlorpyramide is used in the cultivation of strawberries, the risk of hollow deformity increases as the individual strawberry grows.

summary

Strawberries are very nutritious, and they are normally seasonal fruits in summer, but with the development of technology, growing strawberries in greenhouses can make us eat strawberries happily in winter!

According to Popular Science China

Source: Wuhan Evening News