This kind of corn is called popcorn, also called wheat corn. The planting area of popcorn in China is related to variety breeding. In the mid-term of 1980, yellow roses were the main varieties, mainly distributed in Beijing, Hebei, Xinjiang and Shanxi. From 65438 to 0990, Liaoning became a rising star, and Jilin was also planted on a large scale. Now in addition to Xinjiang, Ningxia, Shaanxi, Shandong, Henan, Heilongjiang, Jilin and other places, mainly concentrated in Liaoning, Hebei, Shanxi. The main varieties are Yellow Rose and Shenbao 2. There are two kinds of popcorn, conventional and hybrid, most of which are middle-early maturing varieties. The yield of conventional seeds is low, per mu 150~200 kg; The rate of grain expansion and explosion is low, generally 85%~90%. The hybrid yield is high, 250~350 kg per mu, and the expansion rate is as high as 90%. High purity hybrids should be selected in production.

Popped corn seeds are small in size and weak in germination potential, so sandy loam plots with fertile soil, convenient irrigation and drainage and good water content should be selected for planting, and the sowing depth should be 3~4 cm. Because the quality is different from other corn, in order to prevent cross-pollination from affecting the expansion speed, it is necessary to concentrate on contiguous and isolated planting. It is required to keep a distance of more than 200 meters from other varieties of corn.

Only by ensuring compact plant type, low yield per plant and reasonable density of popcorn can high yield be obtained. Equal row spacing, row spacing of 45cm, plant spacing 18cm. Wide and narrow rows, width 50 cm, narrow rows 40 cm, spacing 18 cm. Leave 8000 seedlings per mu. Plastic film mulching is better.

The male ear of popcorn planted by stages develops slowly, which is beneficial to pollination and prevents baldness. Generally, seeds are sown alternately first, and after 5 days, seeds are sown empty. Article source: Gold Rush Paper Model Center

Field management, early seedling formation and early intertillage after emergence; Promote the early development of strong seedlings. Throughout the growth period, apply standard nitrogen fertilizer 120~ 150 kg per mu. Before ploughing, apply 654.38+00000 kg of organic fertilizer per mu. Apply diammonium phosphate 10 kg per mu at sowing time, 30 kg ammonium nitrate per mu at trumpet stage and 20 kg ammonium bicarbonate per mu at flowering stage. Control underground pests at seedling stage and aphids at later stage. Popped corn is slow in filling and ripening, and can only be harvested after it is fully ripe.