E Mian 21 (cotton)

Emian 21 is a new medium-maturing and high-quality cotton variety selected from the hybrid offspring of (5512/PD4548) F1max / Zhongmiansuo 12 by Hubei Academy of Agricultural Sciences.

The growth period of this variety is 128 days. The root system is developed, the plant is tower-shaped, the plant height is about 120 cm, the stem is stout and straight, the leaf is deeply notched, the Corolla is larger, the anther is milky white, the bell egg is larger, and the bell shell is thin. Participated in the cotton variety regional trial in Hubei Province from 1994 to 1995, the average lint yield was 85.32kg / mu, 3.27% higher than the control variety Ejing 1, reaching a significant level; participating in the production demonstration, the lint yield was 8.46% and 15.96% higher than that of the control variety Ejing 1, and the highest lint yield was 125.2 kg / mu. Emian 21 has good quality, 31 mm cashmere length, good fiber color, white flower crystal and easy to pick. Tested by the Fiber testing Center of the Ministry of Agriculture: 2.5% span length 31.1 mm, specific strength 23.6 g / Tex, micronaire 4.8, uniformity 52.0. Identified by the artificial disease nursery of Hubei Plant Protection Institute from 1993 to 1995, this variety is resistant to Fusarium wilt and resistant to Verticillium wilt. In 1995, the artificial high pressure disease nursery of the Institute of Plant Protection of Chinese Academy of Agricultural Sciences identified that its resistance to Verticillium wilt was better than that of China Cotton Institute 12.

Cultivator Hubei Academy of Agricultural Sciences

Regional and technical Emian 21 is suitable to be planted in cotton areas in the middle reaches of the Yangtze River, such as Hubei and Jiangxi. At present, the popularized area has reached 2 million mu, increasing lint production by 15.6 million kg and creating economic benefits of 1.5 billion yuan. It is estimated that the annual extension area can reach 5 million mu.

Cultivation rules:

1. Timely sowing in order to give full play to the yield-increasing potential of this variety, it can be planted in a nutrient bowl, sowed from the end of March to the beginning of April, and transplanted from the end of April to the beginning of May.

two。 The plant type of this variety is relatively loose with moderate density. In the cotton planting area with high production level, double-film cultivation can be carried out with 2800-3000 plants per mu.

3. Scientific fertilization according to the growth characteristics of this variety, the available nitrogen fertilizer was controlled at the bud stage, and the flower and boll fertilizer was applied again when holding 1 or 2 hard peaches. Every 100 kg lint needs about 22 kg of pure nitrogen, 6 kg of phosphorus pentoxide and 12 kg of potassium oxide. In cotton fields with sandy soil, great attention should be paid to the application of potash fertilizer.

4. Correctly, before and after the cotton plant has 89 main stems and 16 leaves and before and after topping, 1.0g (or 4ml), 2.0g (or 8ml) and 2.5g / 3.0g (or 10ml / 12ml) are sprayed on water to regulate plant type and coordinate growth to achieve high yield and harvest.