Cotton cultivation practices
Since the introduction of demonstration hybrid cotton hybrid variety a1 in Luyi County in 1997, the cultivated area has expanded rapidly. By 2002, the county had grown to more than 400,000 mu, accounting for more than 90% of the county's total cotton planting area. The majority of farmers managed from 3 mu of cotton to one person to manage 8 mu of cotton, and one person managed 10 mu of cotton. The cultivation and management measures are summarised as follows: 1. Adopt seedling transplanting. Use 300 grams per acre, the sowing date of spring cotton is early April, summer cotton is early May. 1.5 meters wide per acre nursery bed 12 meters long, single-point seed. Seedbed management with general insect-resistant cotton. Second, take comprehensive transplanting measures. Due to the rapid development of the marked a1 and its strong ability to make bells, it can be used to simplify pruning or not to fight without pruning. The suitable density is 1000-1500 plants per acre. When transplanting, the plough is used to open the ditch, and 50 kg of phosphate fertilizer, 10 kg of urea, 15 kg of potassium chloride (or 100 kg of vegetation ash) and 2 kg of aldiphalosides can be applied per acre, and then the seedlings can be sealed and the whole land can be used for planting. Sprinkler irrigation. In this way, the efficiency of planting a hole more than doubled, and it is also possible to control the damage of insect pests such as grasshoppers, red spiders, and blind borers during the first 60 days of growing cotton, and to treat both underground pests and make cotton grow steadily. Third, the application of chemical weeding technology. 15 to 30 days after transplanting cotton, weeds and cotton seedlings compete for growth. Each acre can be sprayed with a non-invasive herbicide, 200 g, and a closed herbicide, diclofen, 200 g. The sprinkler is put on a protective cover and the cotton is opened. Spraying seedlings can basically control the damage of a season in a single application. When the cotton enters the flowering stage, it will timely apply 20 kg of urea per acre. Before and after July 25, it will be topped with 10 kg of urea, 10 kg of potassium chloride, and watered in case of drought. After 4 years of rainy topping in rainy years, 4 g of DDP was used to control the capping. In the last few years, aphids and leafhoppers are the main pests of the standard a1. High-permeability acaricides per acre for cotton alum Acacia Wuhan Kono 40 grams of water for 30 kilograms of spray, the use of 1% avermectin per acre and 20% ciprofloxacin per acre spray, are It can achieve the front side of the drug fight dead insects, but also a complete insecticide, valid for up to 1 month, application times can be reduced by 2/3. In August and September, combined with disease prevention and pest control and spraying foliar fertilizer, the top peach can be covered with more knots and the boll weight can be increased. Fourth, October 5 to 10 per acre with 40% ethephon 150 grams of water spray 30 kilograms, can make cotton leaves in the basic net 5-7 days. Unplug the cotton wood and transport it to the yard and the root to the root. This will not only facilitate picking and care, but also help cover the film and prevent rain. The cotton can be sold without drying after picking. The color is good, the quality is excellent, and the selling price can be increased by one grade.