What fertilizer is on the third water of cotton, how many catties of urea, and what other fertilizer

1.Apply basal fertilizer. The base fertilizer is mainly farmhouse fertilizer, which can be applied to the soil in autumn and winter, combined with deep tillage, and can also be used in spring land preparation.

Generally, 3000-4000 kg of high-quality farm fertilizer, 10 kg of urea, 20 kg of diammonium phosphate, 20-25 kg of potassium chloride, or 5 kg of water-soluble fertilizer per mu, and 1-2 kg of zinc and boron fertilizer per mu are applied.

2.Apply seedling fertilizer lightly. Topdressing seedling fertilizer can promote root development and cultivate strong seedlings.

Seedling fertilizer is generally based on nitrogen fertilizer, which can be determined according to seedling conditions, soil fertility, basal fertilizer, etc. For cotton fields with poor soil fertility, insufficient base fertilizer and weak growth, 5-10 kg of urea or high-nitrogen compound fertilizer should be applied per mu, and the soil should be covered after ditching. For cotton fields with high fertility and sufficient base fertilizer, seedling fertilizer can be omitted.

3.Steady application of bud fertilizer. The demand for nutrients gradually increases after cotton buds, and reasonable topdressing at the budding stage can meet the needs of cotton plants, coordinate the relationship between vegetative growth and reproductive growth, and promote the steady growth of plants.

Generally, 15-20 kg of "Ribery Yanwo water-soluble fertilizer" is applied per mu in the early stage of cotton budding. The topdressing method is better to ditch and apply deeply, and keep an appropriate distance from the cotton plant to avoid damaging the roots and affecting the normal growth.

4.Reapply flower boll fertilizer. The flowering boll stage is the period when cotton needs the most fertilizer, and heavy application of boll fertilizer has a significant effect on striving for "three peaches".

Generally, 10-15 kg of urea or 20-30 kg of "Ribery Yanwo water-soluble fertilizer" is applied per mu. For poor soil fertility, less base fertilizer, weak growth of cotton fields, can be appropriately applied early, in the cotton plant flowering up to more than 80, and sit 1-2 young peaches when the topdressing method is appropriate.

5.Supplemental application of cover fertilizer. The supplementary application of cover fertilizer mainly prevents the premature aging of cotton due to lack of fertilizer in the later stage, promotes the steady growth of plants, enhances the ability of disease resistance, insect resistance and premature aging, and strives to produce more autumn peaches and increase boll weight.

Generally, topdressing outside the roots is carried out before and after topping, and 50-75 kg of 1 urea solution is sprayed per mu for nitrogen deficiency or premature senescence cotton fields, once every 5-7 days, and 2-3 times in a row. For phosphorus, potassium deficiency or vigorous green and late-maturing cotton fields, spray Ribery Yanwo potassium dihydrogen phosphate solution every 7-10 days, and spray 2-3 times in a row, so as to achieve the purpose of no yellow leaves, no defoliation, no premature aging, high yield and high quality in the later stage.

Under normal circumstances, the use of urea should be between 15 and 25 catties, and the inner mother is more suitable, so you can soak it in water as a page top dressing or direct top dressing.

Base fertilizer: 2000 kg of high-quality farmhouse fertilizer per mu, 50 kg of cake fertilizer, special compound fertilizer (the ratio of nitrogen, phosphorus and potassium is 1 1, and contains an appropriate amount of boron and zinc fertilizer) 40 50 kg, mix the three fertilizers evenly, pile 10 15 days, at the latest 20 days before cotton transplanting or sowing, open a ditch in the middle of the reserved cotton row (ditch depth 25 cm), evenly apply fertilizer into the ditch, mix the fertilizer with the soil, and then seal the ditch.

1.Cotton is a cash crop with a long growth period, and in order to obtain high yields, the first thing is to apply sufficient basal fertilizer. The types of fertilizers for base fertilizers are mainly phosphorus and potassium fertilizers, and nitrogen fertilizers are appropriate.

Dosage. Therefore, the proportion of nitrogen, phosphorus and potassium in the top dressing at the budding stage in this case should be adjusted, and all diammonium phosphate and half of potassium chloride should be adjusted to the base fertilizer and seed fertilizer.

Use; The nitrogen in the basal fertilizer accounts for 40%-50% of the total nitrogen fertilizer in the whole growth period; The phosphate fertilizer of the base fertilizer should account for 80% of the total phosphorus, and the potassium fertilizer should account for 60%. Application of cotton-based fertilizers.

The best method is to plough the soil below 15 cm after strip application.

2.Cotton sowing or planting seedlings are in the spring, there is a low temperature and late frost cooling problems, in order to cotton seedlings to strengthen the best fertilizer or transplant seedling fertilizer, seedlings.

The amount of fertilizer should not be too much, but it is best to use phosphorus as the main source and less nitrogen distribution; Boron fertilizer is also applied if necessary. The fertilization position of the seed fertilizer is 2 cm below the seedling slope.

Place. Generally, the seed fertilizer uses 5-kilogram of general calcium or kilogram of diammonium phosphorus. The role of seedling fertilizer can promote the cultivation of strong seedlings by roots, cold resistance and bud protection.

3.Cotton has both vegetative growth and reproductive growth, in the management of top dressing must grasp the right time, premature top dressing nitrogen fertilizer is easy to cause growth, vegetative growth.

Too prosperous, in case of wind and rain, lodging and falling buds. Therefore, it is necessary to pay attention to the control of water and fertilizer at the seedling stage to promote the roots, and only by appropriately delaying the topdressing time can we get through the transition.

Period, by the way, Bao Lei Bao Ling. For this reason, top dressing is generally divided into 2-3 chasing. Don't top dressing too early for the first time, and push it back when the seedlings are prosperous. The second topdressing is at the flowering stage, mainly nitrogen fertilizer and potassium fertilizer; Whether to chase the third fertilizer depends on the seedling situation. It is only necessary when there is a high yield.

4.The main reason for burning seedlings is that urea is decomposed in the rain to produce ammonium carbonate, and ammonium carbonate releases ammonia under alkaline conditions, which can be used to produce cotton.

The leaf fumigation image is boiled in boiling water. The way to avoid burning seedlings is to apply urea to a certain depth under the soil surface and cover it with soil. The budding seedlings are small and top dressing.

Control the application rate of 5-kg. Water immediately after urea application.

20 kg of urea, 20 kg of diamine, 15 kg of potassium chloride!

Urea is pure nitrogen fertilizer, so it is 100 kilograms of urea, and a single urea on cotton will not be a problem? Or use some other ingredients to fertilize, you can take a look at the water-soluble fertilizer that is full of joy, there are various nutrients, and the effect should be better than pure urea.

1. Choose the appropriate fertilizer to be sprayed.

The purpose of extra-root fertilization of cotton in different growth periods is different, and the fertilizer composition of spraying is also different, so firstly, the appropriate foliar fertilizer should be selected according to the different growth periods of cotton and its nutrient deficiency. For example, in order to promote the early development of cotton or prevent premature senescence in the later stage, nitrogen fertilizer and phosphorus fertilizer can be sprayed, nitrogen fertilizer and potassium fertilizer can be sprayed to promote the growth of vegetative organs, and trace element fertilizer can be used according to the growth status of crops.

2. Extend the time of spraying foliar fertilizer to moisten the leaves.

The longer the foliar surface is moistened by foliar fertilizer, the stronger the adhesion ability of foliar fertilizer on the foliar surface, and the higher the foliar absorption rate. The wetting time is generally required to be half an hour to one hour, in order to meet this requirement, the moisturizer (neutral detergent, the concentration is appropriate) can be added to the foliar fertilizer when spraying fertilizer to reduce the surface tension of the water and increase the adhesion of the solution on the leaf surface. Some leaves have a waxy layer on the surface, which is not conducive to the solution to moisten the leaf surface and absorption, so spraying on the back of the leaf is also better.

3. Spray mixed with urea.

After different fertilizers are dissolved in water, the osmotic power of infiltrating into the leaves is different, while the effect of extra-root fertilization is different. Generally, urea has the best penetration effect, and at the same time, urea is a neutral fertilizer, which has little damage to stems and leaves, and the mixed spraying of urea and other fertilizers can improve the ability of other fertilizers to penetrate the foliar surface and improve the spraying effect. However, it should be noted that the use of this method should be prohibited in the cotton fields of Wangchang.

Fourth, pay attention to the location and frequency of spraying.

Different mineral elements have different ability to move in the plant, so the number and location of spraying should be different. For some mineral elements with poor mobility, attention should be paid to spraying on the parts that need fertilizer, such as cotton supplementing iron, which should be sprayed on young leaves with good effect, and appropriately increase the number of fertilization. Highly mobile elements (e.g., potassium) can be universally sprayed to increase the absorption area.

It should be noted that if it rains within 24 hours of spraying, it will need to be sprayed again. Generally, foliar fertilizer containing mineral nutrients 667 square meters is sprayed 60 75 kg, sprayed 2 3 times.

5. Reasonably prepare the concentration of the spraying solution.

In actual production, most cotton farmers tend to prepare foliar fertilizers with too high concentrations. Production practice has proved that foliar fertilizer concentration is too high or too low is unreasonable. The scientifically reasonable formulation concentration is:

Urea 1% 2%, potassium hydrogen phosphate, superphosphate 2% 4%, diammonium phosphate 1%, zinc sulfate, potassium chloride or potassium sulfate 1%, iron sulfate.

6. Choose a suitable time for root topdressing.

For cotton with a tendency of defertilization and premature aging, 1% 2% urea aqueous solution can be sprayed, and 2% 3% superphosphate aqueous solution or 800 1000 times potassium dihydrogen phosphate can be sprayed for cotton with vigorous growth. The time of extra-root fertilization is generally from early July to mid-August, and sprayed 2 or 3 times according to the growth of cotton plants. The spraying time is generally in the early morning or evening, and it can also be sprayed on a cloudy day without rain to prolong the solution.

7. Spray fertilizer evenly outside the roots.

When spraying outside the root, the spraying surface should be as uniform as possible, and avoid leakage and re-spraying. If the extra-root fertilization of cotton is implemented according to the above methods, it can really play the role of less fertilizer, high fertilizer utilization rate and fast effect, and then significantly and effectively improve cotton yield. - Medium-Prestige.

Urea, cake fertilizer, and superphosphate can be applied.

The Lop Nur brand potassium sulfate produced by SDIC Luo Potassium can be used as one of your choices, which can improve crop resistance to stress, drought, drought, and storage.

If the soil is thin, the bottom fertilizer is insufficient, and the cotton seedlings are thin, the seedling fertilizer should be applied early. Seedling fertilizer is mainly nitrogen fertilizer, and can also be mixed with phosphate fertilizer and well-rotted organic fertilizer, but the amount of nitrogen fertilizer should not be too much, and 5 kg of urea per mu is generally applied. If the soil is fertile, the bottom fertilizer is sufficient, and the cotton seedlings are vigorous, it can be applied less or no application.

When topdressing, according to the growth of cotton seedlings, grasp the small seedlings to apply more, large seedlings to apply less or no application, so as to promote the growth of small seedlings to accelerate the growth and achieve neat and consistent growth. Top dressing can be about 10 cm away from the seedlings, 6 - 10 cm deep, strip or hole. If the weather is dry and the moisture is poor, it can be combined with watering in order to exert the fertilizer effect in time.

Zhongwei TC is recommended to be 10-15 kg, if you want to improve the utilization rate, you can choose to mix with Chunyu No. 1 (sodium nitrate phenol raw powder).

Cotton can try water-soluble fertilizer all over the land, and the effect is quite good.