There is no difference between kidney beans and string beans.

They refer to the same kind of legume, just called different places, Sichuan and some central China is accustomed to call kidney beans for four season beans.

The young pods or seeds of kidney beans can be used as fresh vegetables, and can also be processed for canning, pickling, freezing and drying, and other common practices, including dry-fried kidney beans, eggplant and bean curd, and stewed potatoes with kidney beans.

Kidney beans are native to Mexico and Argentina, China since the late 16th century began to introduce cultivation, now Hebei, Shanxi, Sichuan, Yunnan, Hubei, Jiangsu and other provinces are widely cultivated.

First, kidney beans (beans) Introduction

1, kidney beans, the scientific name for the bean, commonly known as the four seasons of beans (Sichuan and some areas of central China called the four seasons of the bean), the two seasons of beans, beans, and so on, is a kind of edible legume, belonging to the Rosaceae Leguminosae genus of plants.

2, kidney beans are eaten in a variety of ways, young pods or seeds can be used as fresh vegetables, can also be processed canning, pickling, freezing and drying, dry-fried kidney beans, eggplant beans, kidney beans stewed potatoes, etc. is a common practice, but also can be made into sweet peas, salty peas, kidney beans and rice. Because its seeds contain a toxic protein, which must be processed at high temperatures to inactivate the poison, the consumption of kidney beans must be cooked and boiled through, otherwise there will be the possibility of poisoning.

Second, kidney beans (beans) growing environment

1, kidney beans are suitable for planting in the temperate and tropical high-altitude areas, more resistant to cold and light. As a thermophilic plant, the growth of the appropriate temperature of 15-25 ℃, flowering pods suitable temperature of 20-25 ℃, 10 ℃ below the low temperature or 30 ℃ above the high temperature will affect the growth and normal pollination pods.

2, kidney beans for short-day plants, different varieties of sunshine length requirements can be divided into three categories: a photoperiod sensitive; photoperiod insensitive; photoperiod moderately sensitive type.

3, kidney beans have a developed root system, and more lateral roots, more drought-resistant and not flood-resistant, suitable for planting in the soil deep, soft, humus, well-drained soil, suitable pH 6-7, should not be too acidic or too alkaline.

Three, kidney beans (beans) distribution range

Kidney beans originated in the Americas, Mexico and Argentina, our country since the end of the 16th century began to introduce cultivation, mainly in Hebei, Shanxi, Sichuan, Yunnan, Hubei, Jiangsu and other provinces cultivation.