After decades of practice in cotton production, the adoption of the technology of transplanting seedlings for nutrition seedlings is still a cost-effective measure to meet the national conditions of cotton production in China at present, and it is still worth promoting in cotton production, especially in the south of China. Applied. In order to improve the quality of cotton seedlings and cultivate early and strong cotton seedlings, the following improvements should be made in the purchase of seedbeds.
Change the seedbed for the early preparation of the seedbed. It is better to prepare cotton seedbeds as early as possible, prepare seedbeds as early as possible, and fully sundry the soil; two can freeze over part of the overwintering eggs and larvae; three can eradicate and inhibit the growth of some weeds; four can facilitate fertilization and improve soil nutrient status. Improve fertilizer supply capacity. In general, it is advisable to prepare the seedbed 2 to 3 months before sowing.
Change the old seedbed to the new site. If one site is used for the seedbed bed site, one will make the seedbed more and more low-lying; the other will encourage the deposition of germs, endanger the growth of cotton seedlings, and consider replacing the bed site every year in production so that the reduction of the tillage layer can be avoided. And the accumulation of germs. The new seedbed should be selected where it is sheltered from the wind, with sufficient water and convenient transportation. In addition, according to the habit of adopting the size of nutritious carcasses in the local area, the ratio of seedbeds to transplanted fields should be determined, and the use of large-scale seedlings for transplanting should be promoted.
Change the base fertilizer for the early application of base fertilizer. Tillage beds without base fertilizers or base fertilizers at the end of time will waste a good opportunity for soil and fertilizer integration. Changing the base fertilizer for the early application of the base fertilizer, one can improve the structure of the soil pellet; two can enhance the retention of fertilizer and water properties; three can avoid delaying the application of fertilizer burning seedlings; four can increase the utilization of fertilizer.
The application of chemical fertilizers to the modified base fertilizer is excellent. Continued application of chemical fertilizers on seedbeds will only make the soil more compact. Optimizing the application of base fertilizers must be preceded by the application of adequately decomposed organic fertilizers to increase soil fertilizer levels and reduce weed seedbed weeds. Second, application of ternary compound fertilizers. , To promote the supply of nutrients to complete; third is to prevent partial nitrogen fertilizer, avoid using urea as seed bed fertilizer, to prevent the emergence of poisonous rotten seedlings.
Changing the rough seedlings to complete the seedbed. Extensive cultivating seedbeds have poor fertility and water retention performance, and it is difficult to ensure the quality of nutritional pods. The seedbed cultivation should be combined with the application of base fertilizer, especially the decomposed farmhouse gray manure and human and animal manure urine. After the soil is sunned, it should be applied earlier and evenly mixed, and then it should be finished 2-3 times to make bed soil empty. Under the real, hand-cooked into a group, landing scattered.
The exposed bare seedbed was covered with a plastic film. Bed soil soil seedbeds, 15 to 20 days before planting seedlings should be used to cover the bed of old plastic film to prevent rain wet, delayed sowing. With early mulching, the rain can be planted in an appropriate period, and it will be possible to take the initiative from the season.
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