A Detailed Guide to the Planting Time and Methods of Black Adzuki Beans

AbstractPlanting time: Black adzuki beans are generally planted in mid-May, with a maturity period of about 70 days. Planting method: Select high-quality varieties and plant them by the furrow-sowing method. For the base fertilizer, apply an appropriate amount of farmyard manure, diammonium phosphate, and potassium sulfate. When the black adzuki beans grow 2 true leaves, thin the seedlings. Later, apply an appropriate amount of farmyard manure, and use pesticides such as isofenphos-methyl, decamethrin, and omethoate to control diseases and pests.

I. Planting Time of Black Adzuki Beans

The planting time of black adzuki beans is mid-May, and the maturity period of black adzuki beans is generally more than two months, about 70 days.

II. Planting Methods of Black Adzuki Beans

1. Select good seeds

The Dayangyan black adzuki bean can be selected for planting. This variety has a high 1000-grain weight and resistance to diseases and pests, and it can be sown in snatched stubble after the wheat harvest.

2. Plant at the right time

Black adzuki beans can be planted by the furrow-sowing method. Generally, 2 m makes 1 planting strip, and 6 rows can be planted. The suitable row spacing is 30 cm, and the suitable plant spacing is 12.5 cm. The seeding rate per 1/15 hectare is 4-5 kg, and 17,000 plants can be retained.

3. Formula fertilization

Because the previous wheat crop consumes relatively large amounts of soil nutrients, the base fertilizer needs to be appropriately increased. Generally, per 1/15 hectare, 2500 kg of farmyard manure, 15 kg of diammonium phosphate, and 10 kg of potassium sulfate can be applied. During this period, deep application can be carried out in combination with loosening the soil and opening furrows.

4. Field management

When black adzuki beans grow two true leaves, thinning should be carried out in time. During this period, impurities and inferior plants can be removed, and clumped seedlings can be removed. When the seedlings grow uniformly, intertillage and stubble removal should be carried out in time, and 2000 kg of farmyard manure should be supplemented. During the flowering period, watering should be done appropriately.

5. Control diseases and pests

Common underground pests of black adzuki beans include white grubs, cutworms, and wireworms. Generally, per 1/15 hectare, 50 ml of 50% isofenphos-methyl can be used, then diluted with 50-70 kg of water for control. In the middle and late stages, the main control targets are aphids, bridgeworms, bean pod borers, and bean hawk moths. A 1500-2000 times dilution of 25% decamethrin, or a 1500-2000 times dilution of omethoate, can be used for spray control.

6. Harvest at the right time

When harvesting black adzuki beans, the pods can be picked in stages. On the premise of not affecting autumn sowing, the harvest time can be appropriately extended, which helps promote after-ripening and increase yield.

III. What Is the Difference Between Black Adzuki Beans and Black Soybeans

1. Different taste

The taste of black soybeans is similar to that of soybeans. They are relatively hard, so they need to be stewed longer. Stewed until soft, black adzuki beans have a relatively mealy texture and are more suitable for children and elderly people to eat.

2. Different nutritional value

The protein content of black soybeans is somewhat higher than that of black adzuki beans, while the carbohydrate content is relatively lower. In terms of digestibility, black adzuki beans are easier to digest than black soybeans. Therefore, from the perspective of traditional Chinese medicine, the health-preserving effect of black adzuki beans is better than that of black soybeans.