The difference between black beans and soybeans

Black beans and soybeans are very common beans, many people will buy some beans at home, so what is the difference between black beans and soybeans?

1. Different morphological characteristics

Morphological characteristics of black beans: black beans are kidney-shaped or round-like. 1 the surface is black-red or purplish red, shiny, the seed coat is thin and brittle, and is easy to break. The seed kernel is yellow and white, weak in qi, sweet in taste, flat in nature and non-toxic. Microscopic identification: the outer cells of the seed coat were all stone cells, polygonal or slightly longer, uniform in size, thick in wall, very fine in pore groove and large in cell cavity.

Morphological characteristics of soybeans: pods hypertrophy, oblong, slightly curved, drooping, yellowish green, 4-7.5 cm long, 8-15 mm wide, densely covered with brown-yellow long hairs; seeds 2-5, oval to oblong, about 1 cm long, 5-8 mm wide, seed coat smooth, light green, yellow, brown and black, different from variety to variety, navel obvious, oval. The florescence is from June to July and the fruiting period is from July to September.

Second, growth characteristics are different.

Black bean growth characteristics: strong adaptability, drought tolerance, barren tolerance, salt and alkali tolerance.

The growth characteristics of soybeans: sex likes warmth, the seeds begin to germinate at 10-12 ℃, the optimum temperature for growth is 15-20 ℃, the optimum temperature for growth is 20-25 ℃, the suitable temperature for flowering and podding is 20-28 ℃, the pod setting is delayed at low temperature, it can't blossom below 14 ℃, and the plants with high temperature end ahead of time.

3. Different distribution of resources

Distribution of black bean resources: black bean production is found all over our country. China is rich in black bean resources and various types, and some valuable black bean varieties are still used in production, such as Taixing black bean in Jiangsu Province, which belongs to early-maturing spring soybean in the Yangtze River valley, showing early maturity, high yield and strong adaptability. up to now, it is still the control variety of Southern early-maturing Spring Soybean Group in the National Soybean Regional trial. Dandong medicine black bean is green cotyledon black soybean with large grain, excellent variety and high nutritional value.

Distribution of soybean resources: soybean is native to China. It is cultivated all over China, especially Heilongjiang soybean, and it is also widely cultivated all over the world.