Walnut kernel is rich in nutrition, with more fat and carbohydrate per 100g protein 15 ~ 20g. It also contains calcium, phosphorus, iron and other trace elements and minerals, as well as carotene, riboflavin and other vitamins. It's good for the human body. It is one of the nut foods deeply loved by ordinary people.
Walnut likes light, cold resistance, drought resistance and disease resistance, adapts to the growth of various soils, and likes fertile and humid sandy loam, water, fertilizer and sunshine. At the same time, the requirements for water and fertilizer are not strict, and it is not suitable for pruning after defoliation and before germination, which is easy to cause bleeding. Suitable for most land growth. Calcareous soil is common in deep soil on both sides of the valley.
Extended data:
Walnut is rich in nutritional value, and has the reputation of "Long live the son", "longevity fruit" and "treasure of health preservation". 86% of the fat in walnuts is unsaturated fatty acid. Walnut is rich in copper, magnesium, potassium, vitamin B6, folic acid and vitamin B 1, and also contains fiber, phosphorus, nicotinic acid, iron, vitamin B2 and pantothenic acid. Every 50g walnut contains 3.6% water, 7.2g protein, 3 1g fat and 9.2g carbohydrate.
Walnut's hometown is Iran in the west of Asia, which was brought back to China by Zhang Qian in the Han Dynasty after his mission to the western regions.
1, according to the origin, there are Chencang walnut, Yangping walnut and wild walnut;
2. According to maturity classification, there are summer walnuts and autumn walnuts;
3. According to the smoothness of the shell, there are light walnuts and hemp walnuts;
4. According to the thickness of the shell, there are two kinds of thin-shell walnuts and thick-shell walnuts.
Walnut trees have strong adaptability, few pests and diseases, labor-saving management, convenient storage and transportation of fruits and long service life. Walnut trees like warm and light, and have strict requirements on water, especially in the new shoot growth period and fruit development period, which need sufficient water supply, so they should be planted in sandy loam with loose structure, water retention and good ventilation. The growth cycle of walnut is divided into germination stage, leaf unfolding stage, flowering stage, fruit hard core stage and fruit maturity stage.
Walnut is a very nutritious fruit, which can be counted as a kind of fruit. It can protect the heart function, so it is loved by many elderly people. In fact, walnuts have many benefits, not only for the elderly, but also for young and middle-aged people.
Sweet in performance and warm in nature. Entering the three meridians of lung, liver and kidney can tonify kidney and help yang, replenish lung and astringe lung, moisten intestine and relieve constipation. Reference is rich in fatty oil, protein, calcium, phosphorus, iron, carotene, vitamin B 1, B2, sugar, nicotinic acid and other ingredients.
References:
Baidu encyclopedia-walnut