What is the classification of walnut (walnut) varieties? How to protect against the cold? Key points of cultivation techniques attached

Walnut tree, also known as walnut tree, generally has two varieties: wild walnut and improved walnut after artificial grafting. The fruit of the walnut tree is more famous in nuts, which can develop intelligence, replenish the brain and enhance memory. So what is the classification of walnut varieties? What are the cultivation techniques of walnut trees? What are the cold prevention measures for walnut seedlings?

I. Classification of walnut varieties

1. Qiuzi walnut

Qiuzi walnut is a kind of wild walnut, mainly concentrated in the northeast, which is different from other walnuts in appearance. Qiuzi walnut is mainly used as a walnut, belonging to the relatively low-end category of walnut, the price is more expensive than eating walnut, but will be lower than other walnut varieties.

2. Hemp walnut

Hemp walnut is a semi-wild walnut with many varieties, which is basically a variety of walnut. Unlike Qiuzi walnut, hemp walnut has high value and high price. It is mainly produced in North China and Hebei.

3. Iron walnut

Iron walnut is a species of walnut in the south. Unlike Qiuzi walnut, the surface of iron walnut is similar to peanut skin. The appearance is very close to the edible walnut we often eat, so it creates an opportunity for unscrupulous businessmen to mix the real and fake walnuts, impersonating them with fake iron walnuts, and we should compare them more when we buy them.

4. Cotton walnut

Cotton walnut is an edible walnut, which is mainly used to extract walnut oil. The appearance of cotton walnut is very shallow, the surface is different from iron walnut, there is no small pit, relatively flat, the size is not large.

2. Cultivation techniques of walnut trees

1. Walnut trees are usually collected from August to September, then peeled and dried, and finally stored in the warehouse. Wait until March of next year to prepare the seeds in advance, soak them in cold water for more than two days, fish them out, mix them with sediment, and pile them in a position of direct sunlight. After that, keep dripping water every day, giving enough wet environment space. After about half a month, the shell will begin to crack, and you can pick and sow seeds every day.

2. Walnut grafting is usually carried out from March to April, and scions can be collected around the middle of March. The thickness of the rootstock should be about 1.5cm. Walnut grafting is not easy to survive, mainly because prior preparation is not in place. It is necessary to "release water" from the root within 12 hours before grafting, and bandage the wound quickly.

III. Cold prevention measures for walnut seedlings

1. Walnut seedlings cultivate soil to protect against cold

The main purpose of cultivating soil to protect against cold is to pile soil within 30 centimeters of walnut seedlings, which can strengthen the soil protection of the roots and resist the cold in winter.

2. Walnut seedlings are buried in soil to protect against cold.

Burying the soil for protection against cold is aimed at walnut seedlings exposed outdoors. Because of the low temperature in winter, they cannot fully enter the room, so the whole tree can be bent to the same side and covered with 40 cm thick soil to protect against the cold.

3. Walnut seedlings are painted white to protect against cold

White coating is the most common way to protect against cold, which can mainly alleviate the temperature difference of tree trunks. Formula of whitening agent: quicklime, water, salt. Just mix it according to the proportion of 12:30:1.

The above is the walnut tree knowledge that Tuliu.com has sorted out for you. I hope it will be helpful to you.