Black corn and its cultivation
Black corn is rich in nutrients, and the sugar content of corn stalk is 11.95%, which is 1-3 times higher than that of common corn stalk. It is a good feed for dairy cows and dairy goats. Black corn is a farmer's breed. It has a short plant, narrow foliage, good solidity, and dense planting. Density can be increased by narrowing the plant and row spacing. Planting in stages to extend market supply. Appropriate areas of black corn are suitable for planting in most of the corn planting areas in China. The province has generally promoted planting. There are few black corn processing enterprises, no deep processing capacity, and difficulties in mass production. It is understood that there are also regional differences in our province. In some areas, the market is not very good. Planting around big cities has a relatively broad market prospect. Mainly cultivated varieties 1. Black pearl sweet corn. It is the main cultivar currently being promoted. Its fresh purple grains are arranged neatly, and fresh spiked cooked foods are thin, no slag, sweet and savory, and soft and delicious. The variety has good stress resistance, wide adaptability, high yield, and dry seed yield of 450 kg/mu. Plant height 2.4 meters, spike length 20 cm, double ear rate 95%. The fresh ear harvest period is 80-85 days, and the grain maturity period is 105 days. Mu suitable density 3500 strains. The variety is seedling-tolerant, and the base fertilizer must be applied before sowing, and more phosphorus and potassium fertilizers should be applied. Jointing period, flowering period, pay attention to rooting and preventing lodging. 2. Black (purple) waxy maize hybrids. There are Black Dragonfly 1, Black Dragonfly 2 and Black Dragonfly 3. Heilongjing No. 2 has a height of 1.6 meters, a spike length of 12 centimeters, a conical ear, and a small grain. The plant has a compact shape. After ripening and drying, the grain black shrinks. Good taste, sticky fragrant, no slag, is a mid-maturity and early-maturing hybrid. The black corn can be planted in spring and summer. The planting method is basically the same as that of ordinary corn, and the cultivation method is simple. The specific method is to broadcast the first phase in early April, with a spacing of 1 meter and a 0.17-meter spacing, covered with a plastic film. The second sowing was conducted in early May and the distance from the first sowing line was 0.33 meters. The third seeding was carried out in early June. It was not later than June 15 and the spacing was 0.53 meters from the second seeding line. Field management is the same as normal corn. In this way, the duration of listing from the first phase of the ear to the third phase can last up to 3 months. With 2.5-3 kg of seeds per mu, more than 4,000 fresh sticks can be harvested. Appropriate harvesting period and storage resistance Fresh ears of common corn and sweet corn are dehydrated and wrinkled after a half-day or night of storage. The taste deteriorates and can only be sold on the day of harvest. Black corn is much better than ordinary corn and sweet corn in terms of appropriate harvesting time and storability, and the taste is unchanged after 2 days of harvesting.