Precautions For Fertilization And Disease Prevention In Cotton Planting

< p > < strong > > a href= "//www.sjfzxm.com/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= > //www.sjfzxm.com/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＞　　一是包衣棉种育苗苗床土壤是否还要消毒?现在我国＜a href="//www.sjfzxm.com"＞棉花生产＜/a＞选用的种子，大多数为毛棉籽经过泡沫酸脱绒后再用包衣剂处理的棉种，简称包衣棉种，包衣剂中的药物可杀死依附在棉籽上的病菌，但土壤中潜伏的各类土传病菌还得施用杀菌剂进行杀灭或抑制，如果忽视这个环节，哪怕出得很好的棉苗也可能感染立枯病、炭疽病、茎枯病等苗期病害，因此，整办棉花营养钵苗床时，对苗床土壤仍应施药防病，可选用的药剂很多，如25%多菌灵1200~1500倍液，2.5%适乐时种衣剂500倍液，25%欣秀(丙环唑)乳油5毫升、60%百泰水分散粒剂8克分别兑清水30斤，在做钵之前于苗床土壤喷施，使其药液将钵土全都渗透。

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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