How much does black potato cost per jin? Detailed guide to growing techniques
As park agriculture and pick-your-own tourism agriculture rise in various places, the demand for specialty potato varieties is gradually increasing. Black potatoes come in large and small sizes, with smooth skins; not only is the skin dark purple, but the flesh color is also purple. Black potato is a new colored potato variety that combines nutritional health benefits and ornamental value. Besides its excellent quality of being fine-textured, fragrant and mealy, it also has a unique, brightly colored appearance, and offers benefits such as cancer prevention and beauty care.How much does black potato cost per jin? What are the key related growing techniques?
I. How much does black potato cost per jin?
Black potato is clearly different from the potatoes usually seen. The outside of a black potato is dark purple and glossy, and when cut open the inside is deep purple. The outside of a black potato looks much like a purple sweet potato, but the two are not the same vegetable variety. Black potatoes are divided into two types: Black Beauty potato and Black Diamond potato. The price of Black Beauty potato is around 3-5 yuan, and the price of Black Diamond potato is around 6-8 yuan.
II. Related growing techniques for black potato
1. Sprouting and cutting
20-30 days before sowing, place the selected seed potatoes evenly in a 20°C environment, spray with an appropriate amount of water, and shade them with straw mats. When the young sprouts grow to the size of a soybean, place the seed potatoes in a warm, sunny spot to sun them, so the seedlings turn green and the sprouts grow strong. Cut the seed potatoes 1-2 days before sowing, with each seed piece weighing about 25 grams. Cut small seed potatoes vertically, and each piece must have a strong top sprout; for large seed potatoes, start cutting from the tail end, discard weak sprouts, and following the arrangement order of the eyes, cut diagonally from the top, finally splitting the top into two.
2. Land preparation and sowing
Black potato has a relatively short growth period and requires concentrated fertilizer. Broadcast high-quality organic fertilizer, diammonium phosphate and urea, then deep-plow and harrow the soil finely. Black potato should be planted sparsely rather than densely. Open furrows at a row spacing of 70 cm and a furrow depth of 5 cm; when opening the furrows, apply phoxim granules to control cutworms and other underground pests. After sowing, press down the soil promptly and shape the ridges well, and at the same time spray a mixture of herbicide and New High Lipid Film for control, and cover with plastic film.
3. Field management
After the seedlings emerge, promptly break the film to release the seedlings, and seal the holes tightly with moist soil. After the seedlings are fully emerged, to promote early plant development, spray Diguo Zhuangdiling on the leaves; during the flowering period, promptly remove the flower buds. To increase the rate of large tubers, spray Diguo Zhuangdiling on the leaves. The main disease of black potato is late blight, and the pests are aphids and ladybirds. To control late blight, spray with 64% Sandofan 600x solution + New High Lipid Film; to control aphids and ladybirds, spray with 18% Lorsban 1000x solution + New High Lipid Film.
4. Timely harvest
Harvest at the appropriate time according to market supply and demand conditions, and during harvesting minimize mechanical damage as much as possible so as not to affect commercial quality.