Key points of cotton sowing technology

Cotton is still the main crop in agricultural production in Yaobei, and the cotton sown area is estimated to be 25-30 million mu in 2007. In recent years, cotton output has increased steadily, and economic benefits have been continuously improved. In 2006, the actual cotton area of the whole city was 26000 mu, the average seed cotton yield was 193kg (equivalent to 76.5kg lint per mu), the output value per mu was 1150 yuan, and the income per mu was about 1000 yuan after deducting the cost of agricultural production. In particular, after the promotion of insect-resistant hybrid cotton, the cost of using pesticides in cotton fields has been decreasing, and the environmental pollution to farmland has also been alleviated. Agricultural production in cotton areas has begun to take a new way of ecological benefit agriculture. Cotton sowing is about to begin in 2007. In order to achieve the first sowing of whole seedlings and promote strong seedlings and early development, the main technical points are as follows:

1. Make full preparations before broadcasting. Before sowing, we should mainly pay attention to the improvement of cotton soil and the preparation of improved varieties and agricultural materials. First of all, it is necessary to remove weeds in the cotton field, plough the soil, apply organic fertilizer, and then level the border surface and clear the ditches, so that the cotton field meets the requirements of clean grass, fine soil and communication. if the improved varieties of cotton choose insect-resistant cotton varieties, prepare 400 Mu 600 grams per mu, select regular cotton varieties, select full and full cottonseeds, prepare 2.5 kg per mu, and turn over drying seeds and chemical seed mixing treatment in sunny days before sowing. Agricultural materials should be provided with enough fertilizers, ultra-thin films and herbicides.

2. Sow seeds at the right time and not miss the season. Cottonseed germination requires an effective accumulated temperature of more than 12 ℃ and more than 60 degrees. According to this temperature requirement, cotton should not be sown prematurely. If the temperature is not enough and the emergence time is prolonged, it will cause rotten seeds, rotten buds and uneven emergence; if sowing too late, although the seedlings are complete, they can not cultivate early and strong seedlings and affect the growth process of cotton. According to the climatic characteristics of our city, it is the best time for cotton to be sown from April 15 to 25. During this period, we should grab sunny days, dry land and soil moisture to sow seeds. When sowing, we should first sow plastic film cotton fields, and then sow open ground direct seeding cotton fields, and strive to reach April seedlings.

3. It is necessary to grasp the sowing quality and strive to achieve the whole seedling sowing. First, it should be planted with fertilizer and applied into the sowing ditch, with 7.5 kg of carbon ammonia, 10 kg of phosphate fertilizer and 7.5 kg of potash fertilizer per mu, or 20 kg of 10% ternary compound fertilizer as the seed base fertilizer; the sowing ditch should be shallow ditch, hairy bottom, thin soil cover after falling seeds, spraying herbicides and covering plastic film for heat preservation. Select insect-resistant hybrid cotton varieties, the density per mu is 1500 Mu, sow 1-seed per hole, sow shallow, cover the soil thin, and raise ready seedlings in the corner of the border in order to fill the gap.

4. Do a good job of management after sowing and protect the seedlings as early as possible. Cotton is a dicotyledonous plant. The emergence of cotyledons is extended by Hypocotyl to push cotyledons out of the soil, and because 2 cotyledons are larger, the emergence of cotton seedlings is much more difficult than that of other crops. Generally, cottonseed emergence should be checked regularly for 5 days and 7 days after sowing. When the cotyledons flattened and turned green, the seedlings should be released into the film in time, and sealed with soil at the mouth of the film, so as to promote the development of root system. If there is uneven emergence, it is necessary to fill the gap in time to ensure the whole seedling.