What's the difference between kidney beans, Dutch beans and green beans? Is it one thing?

Green beans are kidney beans, also called "beans". The Dutch brought them from their place of origin to China.

1, same shape

Beans are thin and round, with developed roots, but weak regeneration ability. At seedling stage, the root system grows faster than the aboveground part. The main roots of adult plants can reach 80 cm underground and the lateral roots can reach 60-80 cm wide. The main absorption roots are distributed in the surface soil of 15-40cm.

Dutch bean, flat, annual twining herb, 90 ~ 180 cm high, green, smooth and hairless, covered with powder cream. Leaves with 4-6 leaflets, stipules larger than leaflets, leaflike, heart-shaped, with fine teeth at the lower edge. Leaflets ovate, 2-5 cm long, 1-2.5 cm wide, entire; Stipules leaflike, ovate, petiole base surrounded by spikes.

2. The cultivated soil is different.

Beans are most suitable for planting in deep and soft soil, which is rich in humus and well drained. Sandy loam, loam and general clay can grow, so it is not suitable for cultivation in low wetland and heavy clay land. The suitable pH value is 6-7. It is not advisable to be too acidic or too alkaline. Kidney beans absorb more nitrogen and potassium and less phosphorus. You also need some calcium fertilizer.

Dutch beans do not require high soil conditions, and all kinds of soil can be cultivated, but lime should be applied to strong acid soil. Continuous cropping of Dutch beans is the most taboo, and it takes at least 4 ~ 5 years to rotate. It is best to mix chemical fertilizer and organic fertilizer. Generally, flat bed is used, and low dust depression can be used as high bed. Seeds can be inoculated with rhizobia before sowing.

3. Different nutritional values

Beans are rich in nutrients, including protein, fat, carbohydrates, dietary fiber, vitamin A, carotene, thiamine, riboflavin, nicotinic acid, vitamin C, vitamin E, calcium, phosphorus and sodium. Beans are the champions of calcium supplementation. Every100g of kidney bean with skin contains 349 mg of calcium, which is nearly twice that of soybean.

Dutch beans contain carbohydrates, protein, fat, carotene and essential amino acids. Every 100g of peas contains 7g of protein, 0.54mg of carbohydrate, 0.09mg of calories, calcium, iron, thiamine and riboflavin. In addition, Dutch beans also contain a unique plant lectin, herbicide and gibberellin A20, which play an important role in enhancing human metabolism.

References:

Baidu encyclopedia-green beans

References:

Baidu encyclopedia-Dutch beans

References:

Baidu encyclopedia-kidney beans