Black peanut seeds are oblong and purple-black, and are nutritious and health-care peanut varieties. The growth period is about 130 days, and the big fruit type has a weight of about 250 grams. Spring can also be sowed in summer. Specific planting techniques are as follows:
1. Lot selection. Suitable for pH 5.5-7.2, sandy soil with deep soil layer, live layer and good drainage.
2. Cultivation time. When 5 cm soil temperature is stable above 15 °C, it can be sown. Generally from early March to early May.
3. Seed treatment. Before sowing, use “Biological†nutrition solution to soak 15 kg of water for 3 hours and disinfect seeds with 50 grams of dimethoate. With 40% - 50% of carbendazim 150 - 250 grams seed dressing 50 kg can prevent stalk rot.
4. Planting methods. Drilling, spacing 30 cm. Cave sowing, spring planting density 9000 holes, line spacing 39 cm 18 cm. Summer sowing mu density 11,000 points, line spacing 35 cm 16 cm, sowing 2 seeds per hole.
5. Reasonable fertilization. The end of the application of biological fermentation compost 2000 kg of urea, 10 kg of urea, phosphate 35 kg, 30 kg of potassium sulfate, 0.5 kg of boron fertilizer, 1 kg of zinc fertilizer. 3 - 4 leaf stage spraying chlormequat (according to instructions), spray once every 7 days, and even spray 3 times. In the early flowering period, each special nutrient solution was sprayed with 15 kilograms of water, sprayed once every 10 days, and even sprayed three times. During the flowering period, the base of the plants was covered with soil so that the roots would not be excavated, and the nutrient solution was sprayed after 7 days.
6. Weeding. Before sowing, use 50% acetochlor EC 75 ml water 100-150 kg to spray the ground. 2 - 3-leaf mu with Gaoke 800 - 1000 times sprayed the ground, and then manual weeding.
7. Pest control. At the seedling stage, 5% Jinggangmycin can be sprayed to prevent and treat bacterial blight. For locust-borne locusts, when the alfalfa strain rate reaches 5% to 10%, it can be sprayed with 10% imidacloprid WP 3000 times solution or 40% dimethoate emulsion 1000 1500 times solution. For brown spot, black spot, anthrax, etc., 50% carbendazim wettable powder 1000 times or 80% mancozeb WP 500 times spray at the beginning of the disease, spray every 7-10 days 1 Times, even spray three times. When the leaves turn yellow during the growth period, the roots should be promptly inspected to find the root rot, and 50 grams of root rot should be used to spray 3 to 5 times of 15 kg of water. Prevent and treat ants, use potash powder and base fertilizer together.
8. Field management. Peanuts need more water in their needles and in the weeding stage, and they should be watered in case of drought. Pay attention to drainage during the rainy season, especially to prevent waterlogging during the harvest period to prevent rotten fruit.
9. Appropriate harvest. Black peanuts are poorly ripened, and the lower leaves of the plants are normally shed, and the seed coats are harvested in pink to reduce the rot. Dried in time after harvest to prevent mildew.
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