Cotton seedling management points

Timely release of seedlings after emergence of cotton seedlings is the key to ensure that seedlings are fully seedling strong. The principle of releasing seedlings is to put green without putting yellow. When cotton cotyledons change from yellow to green, the seedlings are timely punched. Putting the seedlings too early, the yellow seedlings with uncoaled cotyledons are released. The cotton seedlings are not adapted to the conditions outside the membrane and are easily drained; the seedlings are released too late and the temperature under the membrane is too high, which can cause burns to the cotton seedlings or the formation of tall seedlings. Is not conducive to nurturing strong seedlings. Miaomian should be planted before 10 o'clock in the morning and after 4 o'clock in the afternoon. When transplanting seedlings, avoid opening the seedlings too much and affecting the insulation of cotton fields. At the same time, after the seedlings are released, they should be promptly sealed with soil to prevent the winds from uncovering the film and running cool down.

Check the seedlings to make up for the lack of cotton and check the seedlings in a timely manner after emergence. Generally less than 50 cm seedlings may not be replanted in order to give full play to their own compensation ability of cotton. Reseeding should be soaked to accelerate the emergence of seedlings to improve the uniformity of cotton seedlings. When transplanting, transplanting with soil is required to reduce the period of seedlings and accelerate growth.

When setting the seedlings between cotton seedlings in a timely manner, we must master the principle of “going big, going small, and keeping middle seedlings”. On the one hand, when large seedlings and young seedlings are removed, the cotton seedlings grow uniformly and there will be no competition for water and fertilizer. Some grow too busy, the speed of the cotton seedlings is very likely to be mutant seedlings, these cotton seedlings grow quickly in the early stages, but late peaches are poor, can not sit bolls, so to change only the seedlings of the fixed Miao errors.

Different varieties of cotton are closely planted and the soil conditions are different. The planting density varies greatly. The planting density of general conventional varieties ranges from 3000 to 4500 and the density of hybrid cotton plants ranges from 1000 to 1500. Farmers throughout the country should be able to flexibly grasp the local soil fertility conditions and planting density.

Cultivate strong seedlings and prevent plant diseases and insect pests After the cotton seedlings are unearthed, the low temperature and rainy weather often cause the growth of the cotton seedlings to be slow, and the “stuck seedlings” are serious, and the diseases of cotton seedlings (rhizomatous blight, anthrax, and root rot) are also prone to occur. When such a situation is encountered, Jiashang A-based organic fertilizer, carbendazim, and hymexazol should be used in a timely manner. On the one hand, diseases of cotton seedlings can be prevented, and on the other hand, soil can be activated, and the freezing seedlings can be lifted. The seedlings are made early to restore growth and improve the resistance of cotton seedlings. Seedling insect pests mainly include aphids and red spiders, which can be controlled by imidacloprid, acetamiprid, and acitrell.

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