Cotton high-yield fertilization skills: what kind of fertilizer is good? How to fertilize?

With the progress of cotton planting mode and technology, fertilization methods also need to be changed appropriately, so how to fertilize cotton in order to achieve high yield? What kind of fertilizer should I use? How to apply fertilizer?

What kind of fertilizer is good for cotton?

Normal growth and development of cotton requires many elements such as nitrogen, phosphorus, potassium, iron, zinc, copper, manganese and so on. According to the research data, each 100kg lint formation of cotton needs to absorb pure nitrogen. 1336 kg, phosphorus pentoxide 4.65 kg, potassium oxide 13.35kg. The fertilizer requirement increases with the increase of yield level. There are slight differences in different varieties and yield levels. At the seedling stage, cotton absorbs 5% of nitrogen, 3% of available phosphorus and 3% of available potassium; from bud stage to early flowering stage, it absorbs 11% of nitrogen, 7% of available phosphorus and 9% of available potassium; from early flowering to full flowering, it absorbs 56% of nitrogen, 24% of available phosphorus and 36% of available potassium; from flowering to boll stage, it absorbs 23% of nitrogen, 52% of available phosphorus and 42% of available potassium; after boll opening, it absorbs 5% of nitrogen, 14% of available phosphorus and 10% of available potassium. It can be seen that the peak of fertilizer absorption of cotton is in the flower and boll stage, the peak of nitrogen absorption is in the full flowering stage, and the peak of phosphorus and potassium absorption is from the full flowering stage to the boll opening stage. Zinc, boron, manganese and other elements are used pertinently according to the supply of soil nutrients. Cotton requires high fertility in the cotton field, so it is necessary to apply sufficient base fertilizer and topdressing in a timely manner. Generally speaking, the principle of being light before and after being heavy in the shopkeeper's grip should be applied because of the ground, time and seedlings.

The method of fertilizing cotton:

1. Light, partial or no application of seedling fertilizer: cotton enters the peak growth period, the nutrient competition among plants is fierce, and weak seedlings will appear the phenomenon of no budding and no flowering. When the basal fertilizer is sufficient and the emergence of seedlings is neat and consistent, spraying the new high-fat film can protect the original nutrients from loss, and the seedling fertilizer can be applied lightly or not; when the seedling height, short, strong and weak are inconsistent, the short and weak seedlings should be partial applied. Then spraying photosynthetic nutrient film fertilizer can help plants absorb a large amount of light fertilizer, light energy, light, compatible conventional fertilizer, nutrients for plant growth and development to the limit.

two。 Stable application of budding fertilizer: after cotton budding, fruit branches began to appear, and the amount of fertilizer needed increased rapidly. Nitrogen fertilizer should be applied properly and cotton Zhuangtiling should be sprayed to supplement the lack of nutrients, so that the growth function of cotton trees could be transformed into reproductive function, so as to improve the fruit setting rate of cotton buds.

3. Supplementary application of capping fertilizer: appropriate application of capping fertilizer. Combined with pest control, cotton topping agent Huawang No. 3 can be used to force the top nutrition of cotton to return to the development of cotton peach and weaken the top dominance until the top stops growing. In order to achieve the goal of hitting the top. The use of thalidomide can effectively improve canopy permeability, prevent premature senility, increase effective boll weight, increase yield, save cost and increase efficiency in cotton field.

The above is the cotton fertilization method introduced by Xiaobian for you. I hope what Xiaobian summarizes can help you grow cotton better. If you want to know more, please follow our WeChat account, popular agrochemical investment network (WeChat: nh1988TV), and more agricultural knowledge planting encyclopedia for you.

How to fertilize cotton to get high yield

In recent years, a large number of insect-resistant cotton introduced in various places have effectively controlled the harm of cotton bollworm, the number of bud and boll shedding has been greatly reduced, the reproductive growth is exuberant, the boll setting is early and many, and the peak of fertilizer needs comes quickly and fiercely. If fertilized according to the traditional method, it often can not meet its needs, resulting in poor vegetative growth and premature senility. In addition, due to the introduction of insect-resistant genes, the disease resistance of insect-resistant cotton decreased, and it was prone to diseases such as red leaf and stem blight.

Increase potassium fertilizer and decrease nitrogen and phosphorus fertilizer

Potash fertilizer can enhance the stress resistance and disease prevention effect of cotton. Therefore, insect-resistant cotton needs to apply more potash fertilizer. If we apply nitrogen and phosphate fertilizer blindly and ignore the application of organic fertilizer and potassium fertilizer, it will not only increase the cost of fertilization, but also lead to premature senescence or late ripening of cotton, which has a great impact on yield and quality.

The operation of increasing organic fertilizer and potash fertilizer and reducing nitrogen and phosphate fertilizer is as follows: about 3000 kg of organic fertilizer and 10-15 kg of potash fertilizer per mu. From 25-30 kg urea per mu and 50 kg superphosphate per mu to 12 kg urea per mu and 25 kg superphosphate per mu. Apply the above fertilizer, combined with soil preparation, to less than 15 centimeters.

What are the principles of fertilizing cotton?

One concentrated application of flower and boll fertilizer was changed into two separate applications.

The flowering and boll stage is the period when cotton grows and develops most vigorously and needs the most fertilizer in its life, so it needs to be fertilized again. Generally, 25-30 kg of urea and 10 kg of potash fertilizer are needed per mu. According to the characteristics of fast flowering and boll setting of insect-resistant cotton, 2 beat 3 of flower and boll fertilizer can be applied in the early flowering stage, and the remaining one can be applied in about 15 days, which can not only meet the needs of continuous flowering and boll setting of cotton, but also effectively avoid the overgrowth and premature senescence of cotton plants.

Topdressing of top manure soil to foliar topdressing

In the later stage of cotton growth, the absorptive capacity of the root system decreases, and if the nutrients are insufficient, it is easy to cause premature senescence, so it is necessary to apply top fertilizer. Foliar topdressing has the advantages of simplicity, quick effect, good effect and fertilizer saving, which can save 2% and 3% fertilizer compared with soil topdressing.

The above is the introduction of some cotton fertilization skills, cotton planting friends can refer to the above methods, combined with the actual planting situation, reasonable fertilization.