Double-film cotton, also known as transplanting mulch cotton, is the first use of plastic film covering seedling nursery seedlings, and then cover the film on the field cover the seedlings developed into cotton seedlings. By adopting this method, it is possible to extend the effective fertility season of cotton through two stages of warming, and play an anti-disaster, seedling-preserving, early-onset premature, and increase production and income. According to many years of investigation, double-film cotton increased production by 20% to 30% in comparison with bare-view direct-growing cotton, and increased production by 10% to 15% compared with nutritional cotton. In recent years, more than 10 million acres have been promoted in China, and a significant increase in production has been received. However, due to the stringent technical requirements for double-film cotton production, poor coordination often results in losses. Seeing the cotton production season again, Yu Hongzhang, a senior agronomist in Xiaogan City, Hubei Province, who has been studying this technology for many years, wrote an article in this series. Please pay attention. Ditching of non-standard need to standardize the reform of the ditch of the cotton field, is the basis for determining the cotton planting method, but also the precondition for whether the double-film cotton can achieve plastic film coverage. In some cotton fields, the gutters are not standard enough, they are not too wide. Reserve cotton lines are very irregular, that is, the car surface is too narrow, the reserve cotton line does not turn over well, or the cotton field ditch has serious congestion. These are not easy to cover film, heat preservation, security, so we must unify the standards, reform the ditch, lay the foundation for the promotion of double-film cotton. First, we must promote two rows of narrow way planting. Specifications are box width (including ditch) 1.5 ~ 1.67 meters, wheat planting area accounted for 35% ~ 40%, all kinds of side of the car row of cotton. If a 80 cm wide plastic film is used to cover, it is necessary to change the ditch, that is to say, the soil reserved on the side of the hatchway should be plowed and merged into the ditch. After the harvest is completed, the ditch will be excavated in the front part of the house. If covered with a 40 cm wide plastic film, cover the membrane and reserve it in the cotton row. The second is to dredge the four channels with high standards. Double membrane cotton cultivation should be connected to the four channels. It is required that the ditch is 17 to 20 cm deep, 27 to 33 cm deep in the ditch, 36 cm deep in the ditch, and 1 m deep in the drainage ditch. According to a number of previous surveys, the cotton fields and seedlings of the high-standard ditch had an average height of 80.7 cm and 11.6 layers of fruit branches, while the cotton fields with serious muddy water in the ditch had a height of only 33.2 cm and only 3.6 layers. Third, we must fine-tune the soil. Preserve the cotton line to carefully prepare the soil before the summer grains are full of ear, so that the soil is soaked in the grass, and the virtual water supply is appropriate, and the water content is moderate, which is convenient for film-mulching.
Disposable Butterfly Needle,Butterfly Blood Drawing Needle,Butterfly Blood Collection Needle
Henso Medical Co., Ltd. , http://www.hzurology.com