Planting conditions of kidney bean

String beans originated in Central and South America and were introduced into Asia from the 17th century to the 19th century. String beans can be widely cultivated in both the north and south of China. Today, the editor will share with you the planting conditions of string beans.

Temperature demand

Green beans like warmth and can't stand frost. The temperature range of seed germination is 20-30 ℃, and it cannot germinate below 10 ℃ or above 40 ℃. The seedlings were sensitive to the change of temperature, and the seedlings began to lose green at 2-3 ℃ in a short time, and 0 ℃ was caused by freezing injury.

Lighting demand

It belongs to short-day plants, but different varieties have different responses to photoperiod, which can be divided into three types: one is photoperiod sensitive, the second is photoperiod insensitive, and the third is moderately photoperiod sensitive.

Water demand

Phaseolus vulgaris has well-developed roots and more lateral roots, which is more tolerant to drought than waterlogging. Seed germination needs to absorb enough water, but too much water, lack of oxygen in the soil, seeds are easy to rot. The suitable field water holding capacity during the plant growing period is 60-70% of the maximum water holding capacity, the water requirement is strict at the flowering stage, and the suitable air relative humidity is 65-80%.

Soil and nutritional requirements

Kidney bean is most suitable for cultivation in the soil with deep, soft soil layer and good drainage of humus. Sandy loam, loam and general clay can all grow, so it is not suitable to be cultivated in low wetland and good heavy clay. The suitable pH is 6-7. Should not be too acid or alkali. Kidney beans absorb more nitrogen and potassium and less phosphorus. Also need some calcium fertilizer.