Now it's the season when grapes are concentrated on the market, and the fruit stand is full of grapes of 10 colours, with different lengths of fruit grains and thin skins. What's the difference between grape varieties
Today, let's talk about grape selection。
Grape selection principles and grape types
Let's start with the most interesting part of the story, how to pick a nice bunch of grapes. In general, the selection of grapes is largely based on its maturity and freshness and can be guided by the following four main points:
01
The colour of the whole string of fruits is equal, which means that all fruits are fully mature. If some of the grains are green and white, this indicates insufficient maturity。
02
There's a clear white frost in the fruit, a symbol of grape freshness。
03
And the fruit is green and full, and there is no dehydration, that the grapes are fresh。
04
There was no visible deterioration of the fruit, nor did it smell of wine. If the smell of alcohol indicates that the fruit has been stored for too long。
These four principles can be applied to most grape species. But if you think you're using these four methods, you're worried about the pick of acid grapes..
Then you can have the courage to say to the fruit shop owner, "boss, i'll take a taste."。
After the selection principle, then the type of grape. Today, there are many different varieties of grapes in the market, and there are different tastes and sweet grapes that make a mess。
Information on a number of common varieties of grapes, including their trade names, origin, listing times and characteristics, is set out below and selected according to their respective regions and times。
Solar rose grapes
Source: periphery of grapes, yunnan. Listing time: march to july (yunnan region), july to august (other region)。
Sunshine roses are not easy to separate from fruit, and fruit is still green when it matures, but there are lovely roses and sugar levels above 22. Splendid. It can also be denuclearized and tasted in a special manner。
2. Peak grapes
Place of origin: average production in the grape-producing regions. Listing time: july to september。
The porcelain grapes have a standard grape shape and colour, and the spherical fruit matures in purple red. The fruit of the raisins is easily separated from its skin, and it is tender and full of water. The green tree of the grapes defines a lot of friends as "the grape on the tip of the tongue." sugar can reach 18-20, sour sweet。
Rose grapes
Origin: ping, xinjiang, wine-producing areas
Listing time: august-september。
The grains are small, the skin is medium thick, purple red or black purple. Sugar 18-20, softer, juicy, fragrance. The only disadvantage is that the grain is smaller. The main initial use is wine brewing, which can also be used as fresh grapes。
4. Dark summer grapes
(b) origin: all grape-producing areas are produced, while yunnan is concentrated. Listing time: march-june (yunnan region), july-august (other regions)。
Photo taken by shijun
Middle, non-fracking, non-faulting, and dense grains are the advantages of summer and black, with good commercial performance. Sugar 19-22, hard fruit, some strawberry fragrance, sweet grapes and no skinting friends. It can also be used as wine-making wine, and fully mature summer black grapes can be used to make peach red wine and brandy。
Goldfinger grapes
Place of origin: average production in the grape-producing regions. Listing time: in july-august, the facility could be planted early in late march。
Photo taken by shijun
The fruit is like a chili, and when it matures, it's still light green. Sugar can be 20 or more, and it tastes like ice cream and milk。
6. Xinjiang non-nuclear white grapes
Origin: xinjiang. Listing time: july to september。
A traditional raisin breed has a long history of cultivation in xinjiang. The grains are small, long ellipses, low yellow green when mature. Sugar can be 21 or more, very sweet, and the fruit has a little fragrance。
7. Grape no. 8
Source: shaanxi. Listing time: august。
A hybrid of european and american grapes was formed by the siam city grapes institute through the olympia sprouts. A single grape is almost a small ping-pong ball, with large grains of fruit, near circle, sour sweets, thick fruit. It's thick, it's easy to separate, it's thin, it's particularly good for a friend who eats grapes。
8. Finger grapes
Place of origin: average production in the grape-producing regions. Listing time: august-september。
The fruit cylindrical with dark blue purple colour. More than 19 sugar, thin, hard, non-nuclear, good fresh food。
Queen nina's grapes
Origin: yunnan. Listing time: august-september。
Photo taken by shijun
Japan's new red, super-sized european-american hybrid species. It's big, fresh red, like rubies. Sugar can be 23 or more, rich in strawberry and milk, and fresh fruit。
It's worth noting that most grapes are on the market between july and september
Well, after talking about the selection know-how of grapes and the variety of commercial grapes, then we're going to say where they come from。
Where do the grapes come from
Today's consumption of grapes comes from two species, eurasian and american。
1. Eurasian stocks
Most of what we usually call grapes comes from eurasia, which is originally from the eurasia continent and consists of one eurasia grape species and over 5,000 subgenerous species。
Compared to other grape varieties, the fruits of the eurasia grapes are of good quality and pure taste. They are the main varieties used for daily food, raisin production and wine brewing. Eurasia grape cultivation records can be traced back to 600 b. C。
In 400 b. C., grape cultivation of the eurasian population spread from the south caucasus region to little acoa, while entering the nile delta through new moon volvo。
In the sixth century b. C., the greeks passed on the techniques of grape cultivation and wine brewing to the gauls. Subsequently, the romans carried out an explosive expansion of the vineyards throughout gaul。
2. American stocks
The american population consists of 28 grapes, of which more valuable are american grapes, riverine grapes and sandy grapes. Among them, grapes in the americas are not very sweet, and brewed wine smells of musk。
Although the flavor is not popular, the resistance to disease, cold and dampness of the grapes of the americas is so great that they are taken back to europe by traders and try to mix them with euro-asian grapes to produce better-quality offspring。
However, the roots of the parasites on the root roots of the americas almost completely shut down european vineyards. Facing the roots, the eurasia grapes have little chance of survival。
Later, the growers found that the roots of the american grapes could be treated as gills and that the eurasian grapes could be attached to them before they escaped。
In addition to the grapes of the americas, riverine grapes and sandy grapes have excellent resistance to disease and cold, as well as very good resistance to root tumors and are often used by agronomists as gills。
Today, agronomists have grown many hybrid varieties of grapes for human consumption。
Is the titanium grape
Here again, the questions of “tits” and “raisins”. Actually, titties are a kind of grape. The term “tits” is called because they are slightly different in taste from the thickness of the bark and grapes。
Grapes are juicy and soft and easily separated. This is the characteristic of the distinction between “ordinary grapes” and “tits”。
What's the cream on the grapes
It is neither a pesticide residue nor a glucose, but a wax on the skin of the grapes. Grape surface wax is mainly a substance called chochoric acid, which accounts for 60% to 70% of the total weight of frost。
In addition, a number of ethanol and ester substances are contained in white frost. These substances have one thing in common and are not soluble in water, so friends who want to wash off the glitter of the grapes are always mad。
But it doesn't matter if they don't get rid of them. Because chorus acid does not endanger our health, we can easily swallow all the grapes with white cream。
Apart from grapes, now listed in the market, there is also white frost on fruits such as apples and blueberries。
There are many who believe that this is pesticide residue or unclean material, but these are actually fruit-based substances that protect their normal excretion。
Author of shijun, ph. D. Botanical
I'm a researcher
Liu guangyu high-level project, western bizonal tropical botanical garden, chinese academy of sciences division
(kop china)
