The pods of the kidney bean are 10 to 20 centimeters long, straight or slightly curved in shape, rounded or flattened in cross-section, with a densely tomentose epidermis; the young pods are shades of green, yellow, purple-red (or mottled) and other colors, and are yellowish-white to yellowish-brown at maturity.
The root system is more developed. The stems are trailing, semi-trailing or dwarf. The first true leaves are simple and opposite; later true leaves are ternately compound and nearly heart-shaped. As the pods develop, the vascular bundles at the dorsal and ventral sutures are gradually developed;
Racemes are axillary, with butterfly-shaped flowers. Corolla white, yellow, light purple or purple color. Self-pollinated, a few capable of heterogamous pollination. Several to more than 10 flowers per inflorescence, bearing 2 to 6 pods.
The number of layers of thick-walled tissue in the mesocarp and endocarp is gradually increasing, thus reducing the quality of fresh food. Therefore, the young pods should be harvested at the right time. Each pod contains 4 to 8 seeds, seeds kidney-shaped, red, white, yellow, black and mottled colors; thousand grain weight 0.3-0.7 kg.
Expanded Information:
Brass bean is suitable for temperate temperatures, but it is not a good choice for the most demanding people. p>The kidney bean is suitable for planting in temperate and tropical high-altitude areas, more cold-tolerant and light-loving. Bean is a temperature-loving 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.
The kidney bean is a short sunshine plants, but most varieties of sunshine length requirements are not strict, the cultivation season is mainly subject to temperature constraints. China's northwestern and northeastern regions in the spring and summer cultivation; North China, the Yangtze River Basin and South China line spring and fall sowing. Direct or seedling transplantation can be.