< p > < strong > > a href= "//m.pmae.cn/news/" > cotton fertilization > /a > method to prevent disease and increase yield two.

< p > insect resistant cotton effectively controls the damage of cotton bollworm, the number of abscission of bolls and bolls is greatly reduced, reproductive growth is vigorous, bell rings are earlier and more, and the peak of fertilizer needs is fast and fierce.

Traditional fertilization methods often fail to meet their needs, resulting in poor vegetative growth and premature aging.

In addition, insect resistant cotton was introduced into the insect resistant gene, and its disease resistance decreased, and red leaf stem blight and other diseases were prone to occur.

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< p > if blindly increasing nitrogen and phosphorus fertilizer and neglecting the application of organic fertilizer and potassium fertilizer, it will not only increase the cost of fertilization, but also often lead to premature decay and late maturing of cotton, which will have a great impact on Yield and quality.

Therefore, we should increase the amount of organic fertilizer and potassium fertilizer, reduce nitrogen and phosphate fertilizer, apply 3000 kg of organic fertilizer per mu, and 10~15 kg of potash fertilizer.

From the traditional per mu of urea 25~30 kg, SSP 50 kg, to 12 kg per mu of urea, SSP 25 kg.

The above fertilizers should be combined with soil preparation for less than 15 centimeters.

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< p > changing the flower boll fertilizer for one time is the two application: flower and boll stage is the most vigorous period of cotton growth and needs the most fertilizer during the whole life, and the flower and boll fertilizer must be applied again.

It is generally required to use urea 25~30 kg per kilogram and 10 kg of potash fertilizer.

According to the characteristics of fast and centralized flowering and Bolling of insect resistant cotton, the 2/3 of flower and boll fertilizer can be applied to the initial flowering stage, and the remaining 1/3 will be applied again after 15 days. This can not only meet the needs of continuous blooming and Bolling of cotton, but also effectively avoid the long and premature decline of cotton plants.

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< p > cover top soil for topdressing: foliage application: cotton growth at the late growth stage, root absorption capacity decreased, if nutrient deficiency, it is easy to cause premature senescence, need to cover top fertilizer.

Top dressing with foliar topdressing has the advantages of simplicity, quick effect, good effect and saving fertilizer. It can save 2/3 fertilizer than soil topdressing.

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< p > < strong > < a > href= > //m.pmae.cn/news/index_c.asp > cotton seedling > /a > when weeding and weeding is concerned, < /strong > /p >

< p > recently, a farmer called Shu Qiao village in Wu Luo town of Yunmeng County, Hubei Province, and asked for advice on cotton medication. Now, I will talk about the precautions for pesticide control in view of the two problems raised by farmers in cotton seedling raising.

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＜p＞　　一是包衣棉種育苗苗床土壤是否還要消毒?現(xiàn)在我國(guó)＜a href="//m.pmae.cn"＞棉花生產(chǎn)＜/a＞選用的種子，大多數(shù)為毛棉籽經(jīng)過(guò)泡沫酸脫絨后再用包衣劑處理的棉種，簡(jiǎn)稱包衣棉種，包衣劑中的藥物可殺死依附在棉籽上的病菌，但土壤中潛伏的各類土傳病菌還得施用殺菌劑進(jìn)行殺滅或抑制，如果忽視這個(gè)環(huán)節(jié)，哪怕出得很好的棉苗也可能感染立枯病、炭疽病、莖枯病等苗期病害，因此，整辦棉花營(yíng)養(yǎng)缽苗床時(shí)，對(duì)苗床土壤仍應(yīng)施藥防病，可選用的藥劑很多，如25%多菌靈1200~1500倍液，2.5%適樂(lè)時(shí)種衣劑500倍液，25%欣秀(丙環(huán)唑)乳油5毫升、60%百泰水分散粒劑8克分別兌清水30斤，在做缽之前于苗床土壤噴施，使其藥液將缽?fù)寥紳B透。

After the emergence of cotton seedlings, spray should be timely to prevent the invasion of foreign pathogens.

Medicaments that can be sprayed, such as 1: 2: 200, Bordeaux or 0.01% Bao Liang.

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< p > two is it possible to use herbicides on cotton nutrition bowl beds? Cotton nutrition bowl seedlings often encounter grass damage problems. Sometimes weeds can also cause grass seedlings and seriously inhibit the growth and development of cotton seedlings.

The serious shortage of grass on the seedbed is often caused by two reasons. First, the seedbed of the new location is too late to turn over the soil to be ploughed up. The weeds do not grow in winter, spring, and hoe, leaving the residual weeds to propagate. Two, the farmyard manure is applied and the fertilizer is not thoroughly decomposed. The seeds of the weeds are brought into the seedbed and propagated rapidly.

Therefore, it is necessary to apply herbicides before the emergence of cotton. One can choose 48% lac milk, 150~200 milliliters per mu, or 72% Dole milk per mu 150 milliliters, respectively, spraying with water 60~80 Jin, two can choose 23% bed grass cream, two mus of water for 80 kg of water per mu, can effectively prevent weeds.

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