Big white kidney bean Big white kidney bean, also known as Beijing bean, white bean, big white bean, commonly known as "big mung bean rice" and so on. After cooking, the skin opens like white clouds, so it is called "white cloud bean". Looks like "chicken kidney", also known as "white kidney bean". According to legend, in ancient times, the Jade Emperor accidentally threw Yu Pei and Ying Luo to the world and turned them into beans of various colors or stripes. Since then, it has multiplied into famous specialty white kidney beans, yellow kidney beans and flower kidney beans. Therefore, it is also called "Xiandou". White kidney bean is an ancient and precious edible bean in China, with a long planting history. White kidney beans in southern Shaanxi are produced in Luonan, Zhen 'an, Zhashui, Feng Dan, Zhenping, Gao Lan, Pingli, Xunyang, Zhenba, Ningqiang, Liuba, Xixiang and Lueyang counties in southern Shaanxi. Most of them are planted sporadically and rarely in pieces. Some counties in northern Shaanxi also produce it. White kidney bean in southern Shaanxi is a kind of precious bean with large grain, thick endosperm, white and bright taste, good quality and rich nutrition. The granules are twice as big as broad beans and the tallest among beans. It has a long-standing reputation in domestic and foreign markets and is an important export bean in our province. According to the determination, the protein content of white kidney bean is 19.94%, which is 5% ~ 10% higher than that of wheat and 12% higher than that of corn. The fat content is 2.46%, which is higher than that of wheat 1%. The starch content is 65.8%, which is 26% higher than that of potato. It also contains a variety of amino acids beneficial to human body, minerals such as calcium, phosphorus and iron, as well as soluble sugars and carbohydrates. The contents of vitamin b 1 and b2 are higher than those of soybean and wheat. It can be used to make canned food or eight-treasure porridge, which is delicious and unique. It can also be made into various foods, and the bean paste is the first-class filling of bean bags. White kidney bean powder is used to make vermicelli, which is white and thin, shiny and tough. White kidney bean is a kind of rare bean commonly used in western food. Stewed meat, chicken, trotters, etc. Usually used by people of origin. They can be cooked in a pot for a long time without cracking, but they will crack immediately when they are scooped into a bowl, so local villagers call it "flowering in a bowl." Because of its advantages of large grain, white color, delicious taste, fresh soup and rich nutrition, it is regarded as a holiday delicacy and a gift treasure. At the grand banquet, white kidney beans from southern Shaanxi can be used together with other foods to make delicious dishes with various exquisite patterns, which not only increases the festive atmosphere, but also allows guests to feast their eyes. Some counties in northern Shaanxi also produce white kidney beans. For example, "Yichuan County Records" records: "White beans are a specialty of Yichuan, with large particles and beautiful color. They can be used to make stuffing and cakes, and they can also be used to make bean paste, which is the best choice for banquets. " In the folk, it is usually used to cook porridge, rice and vegetables, and becomes a favorite food. White kidney bean also has the medicinal functions of nourishing yin and tonifying kidney, strengthening spleen and warming middle warmer, reducing qi and promoting diuresis, stopping dysentery and promoting digestion, detoxicating and stopping vomiting, and is an ideal food therapy. White kidney bean also has sedative effect, and has certain curative effect on treating hiccups due to deficiency cold, vomiting due to stomach cold, traumatic injury, wheezing and coughing, lumbago, neuralgia, pertussis in children and other diseases. White kidney bean contains mineral sodium, which is very suitable for patients with heart disease, hypertension and salt aversion. White kidney bean belongs to Leguminosae, an annual crop, which likes warm and short sunshine. Its growth period is about 75 ~ 90 days, and its accumulated temperature is about 65438 0500℃. The soil requirements are not as strict as other crops, and planting on sloping land and cultivated land with low fertility is better than other crops. Can be planted singly, can also be intercropped with other crops, can be replanted, occupies less land, and does not compete with large crops for land and time. Multiple cropping index is high. In the case of limited land area, the advantages of intercropping and interplanting can be used to fully expand the planting area. Sow in spring all the year round, from early April to early May. Wheat should be sown in summer immediately after harvest, and the earlier the better. No later than the beginning of July. It is necessary to do a good job in soil preparation and fertilization, and apply appropriate farmyard manure before sowing. If there is no farmyard manure, apply a small amount of phosphate fertilizer in combination with sowing. Reasonable close planting, disease prevention and seedling protection, intertillage and weeding, timely harvest, prevent bud mildew and improve yield and product quality. Large white kidney beans, export prices are bullish. The price per ton is 400 ~ 600 dollars, which is very popular with foreign businessmen. The mountainous areas of southern Shaanxi and northern Shaanxi should give full play to the advantages of intercropping and interplanting, strengthen agricultural technical guidance, expand the cultivation of white kidney beans, earn foreign exchange through export, and increase farmers' income.