1 Which kind of pecan is better? Carya cathayensis with large round shape, thin white shell, high kernel yield, dry peach kernel slices, white color and high oil content is better. The selection method should be based on kernel observation. The plumpness of nuts is the best, followed by dryness; The color of kernel coat is mainly yellow and white, followed by dark yellow; Brown is even worse, and the quality of "tiger skin hickory" with dark brown spots is not good. Oil skin is a sign of deterioration, white fresh meat is the best, followed by oil stain "chrysanthemum heart"; The seeds are oily, sticky, dark brown and spicy, and they have been seriously deteriorated and cannot be eaten.

What's the difference between pecan and walnut? 1. Walnut, native to the Near East, also known as walnut and peach, is also known as the world-famous "four dried fruits" with almond, cashew nut and hazelnut. It can be eaten raw or fried, and can also be used to extract oil, make cakes and make sweets. It is not only delicious, but also has high nutritional value. It is known as "Long live the child" and "longevity fruit".

2. Carya cathayensis is sweet and flat, which can replenish qi and blood, regulate dryness and eliminate phlegm, warm kidney and lung and relieve asthma. Eating pecans regularly can nourish blood vessels, increase appetite, blacken hair and beard, and can also treat sexual dysfunction, neurasthenia, memory loss and other diseases, so there is a folk proverb that "people often eat walnut oil and white-haired old people play with yaks".

3. Compared with Carya cathayensis, the contents of mineral elements and trace elements such as sodium, magnesium, phosphorus, iron, zinc and manganese in Carya cathayensis are more than those in domestic walnut. In addition, pecan is more nutritious and tastes better than walnut because of its natural and wild characteristics.

3 How to preserve pecans for a long time First of all, try to put them in a ventilated place. Do not use sealed bags. It is best to use cloth bags, sacks or other bags with good air permeability.

Secondly, the bag with good air permeability is used to prevent the walnut from effectively and quickly emitting and absorbing moisture and moisture under the condition of insufficient dryness, so as to better keep the walnut dry and prevent it from moisture regain and mildew. Finally, it is suggested that walnuts should not be peeled and stored in shells for a long time.