There are two ways of kidney bean: direct seeding and seedling transplanting. At present, the latter is mostly cultivated in spring. The direct seeding method is hole seeding, with 3~4 capsules per hole. Cover with plastic film after sowing, and cut off the plastic film after the seedlings are unearthed.

Before sowing, the seedbed should be watered from the soles of the feet, with 3~4 seeds per hole and sowing 8 cm square. After sowing, properly cover 0.5 cm of nutrient soil and water. The same is true of the method of raising seedlings in nutrient bowls.

After sowing, put the bamboo pole on the seedbed, cover it with plastic film, and finally set up a shed. The seedling stage is mainly heat preservation. After emergence, the plastic film should be removed in time, and the cotyledons should be cooled appropriately to prevent excessive growth. One week before sowing, the seedlings are exercised at low temperature. Generally, there is no need for topdressing and watering at seedling stage, and a small amount of water is used when drought is excessive. After watering, sprinkle some dry soil on the surface of bed soil to prevent water evaporation.

Management of concanavalin;

The management after colonization is mainly temperature and light, fertilizer and water regulation and pest control. Within 7 days of planting, seedling promotion is delayed, and heat preservation is not ventilated; Ventilation and cooling are carried out after seedling delay to avoid excessive growth; It can be ventilated day and night during the flowering and pod setting period to reduce the humidity in the shed and promote flowering and pod setting.

Sword beans need sufficient light during the whole growth and development period, so it is necessary to uncover the night cover early in the shed. In addition to the base fertilizer, organic fertilizer, bean cake and other topdressing should be used for 2-3 times. The principle is to apply less before flowering, more after flowering, and then at the peak of pod setting.