Peanut belongs to the genus Panicum and has nodules; Stems erect or prostrate, angular; Stipules hairy, leaflets ovoid-oblong or obovate, apex obtuse, base nearly round, entire; Corolla is yellow or golden yellow.

Style extends out of calyx tube; Pods are long, swollen and thick; Flowering from June to July; The fruiting period is from September to June at 5438+00. After flowering and fertilization, the ovary will fall into the dark field and grow in secret, hence the name groundnut.

Peanut originated in Brazil, South America, and is now widely planted all over the world. Peanut is widely planted in China, Shandong, Hebei, Henan, Jiangsu and Anhui provinces. Peanut likes high temperature and dryness, and is suitable for growing in sandy soil with warm climate, long growth period and moderate rainfall. The propagation method of peanut is seed propagation.

distribution range

Peanuts are widely distributed in China and planted everywhere. The main producing areas are Shandong, eastern Liaoning, Leizhou Peninsula in Guangdong, Yellow River and Huaihe River Basin, and hilly and sandy areas along the southeast coast. Among them, there are more Hebei, Henan, Jiangsu and Anhui provinces in the north, and the Shandong Peninsula, hilly areas in central and southern Shandong, the lower reaches of Luanhe River in eastern Hebei, the Yellow River flood area in eastern Henan and the Huaibei area in Jiangsu, Anhui and Huaibei are peanut producing areas.

There are more than 100 countries producing peanuts in the world, and Asia is the most common, followed by Africa. However, there are only more than 65,438+00 countries producing commodities. Among the major producing countries, India and China have the largest planting area and output, with the former being about 7.2 million hectares and 5.6 million tons, while the latter being 3.553 million hectares and 6.757 million tons respectively (1.985). Other countries include Senegal, Nigeria and the United States.