How to apply nitrogen fertilizer at the jointing stage of wheat and how to manage the jointing stage

The jointing stage refers to the period when the internodes of the stem are rapidly elongated upwards during the growth of cereal crops. In the process of wheat planting and fertilization, topdressing at the jointing stage is very important, which directly affects the yield of wheat. Winter wheat topdressing is usually mainly nitrogen fertilizer, and the topdressing amount and topdressing period should depend on the wheat seedling condition.

The amount of nitrogen fertilizer applied is usually about 50 70 of the total nitrogen application rate. For the strong seedling wheat field with good fertility, normal growth and moderate collective, the promotion and control should be adopted, and the management principle of "promoting before winter, returning to green control, and attacking the panicle after jointing" should be adhered to, and about 10 kg of urea per mu should be applied during the jointing period; For the collective more than 900,000 seedlings of the seedling field, it should be mainly controlled, and try to avoid a large amount of nutrients being consumed in the seedling stage, resulting in later fertilizer.

How to manage wheat jointing stage? What fertilizers are suitable for application?

1. Top dressing and jointing fertilizer are mainly combined with fast-acting nitrogen fertilizer. According to the growth potential of wheat, it is generally possible to apply 20-30 catties of urea per mu, and less to apply vigorous wheat. Top dressing should be carried out at the jointing stage. It is best to apply 5-10 cm deep at the roots.

2. Watering management from jointing to booting to maintain proper field moisture. In the event of drought, the amount of irrigation should be smaller. At the same time, it is rainy from March to April, and the wheat field should be cleaned and drained in time to prevent water accumulation.

3. Weeding managementAfter the temperature rises in spring, the seeds that did not appear before winter begin to germinate and grow rapidly, which seriously affects the growth and development of wheat. Therefore, weeding should be carried out in a timely manner. To be on the safe side, when weeds are present in the field, you can choose to remove the weeds manually instead of spraying herbicides.

4. To prevent colds in late spring, pay close attention to weather changes. Before the cold of late spring begins, water should be raised to raise the ground temperature. At the same time, uniform spraying of potassium dihydrogen phosphate + brassinolide + a variety of trace element foliar fertilizers on the foliar surface of wheat jointing stage can enhance the cold resistance of plants.

5. Pest control During this period, attention should be paid to the prevention and control of wheat stem rot, sheath blight, red spider and other pests and diseases. Sheath blight and stem rot can usually be controlled by spraying enazole, tebuconazole, propiconazole, Bacillus subtilis, and other chemicals; Spider mites can usually be sprayed with avermectin, pyridoxal, tretinoin, and other chemicals.

What fertilizers are suitable for application? It is best to apply compound fertilizer or urea in moderation. Pay attention to fertilizer and water management and pest control, mainly focusing on phosphate and potassium fertilizers.

Basal fertilizer should be applied during wheat jointing. At the jointing stage of wheat, strengthen field management, control diseases and pests, and apply urea according to the growth of seedlings. In order to do a good job in fertilizer and water management and pest control, 45% compound fertilizer plus urea can be applied.

Seedlings are fertilized mainly with fast-acting fertilizers. Be sure to clean the ditches to prevent stains and sheath blight.

Top dressing and jointing fertilizer are mainly combined with available nitrogen fertilizer. According to the growth potential of wheat, it is generally possible to apply 20-30 catties of urea per mu, and less to apply wheat that grows vigorously and feasts on God. Top dressing should be carried out at the jointing stage.

It is best to apply 5-10 cm of chain loss at the root. Watering management from jointing to booting to maintain proper field moisture. In case of drought, the amount of irrigation should be smaller.

At the same time, it is rainy from March to April, and the wheat field should be cleaned and drained in time to prevent water accumulation.

The most important thing in the process of wheat growth is fertilization, as well as proper removal of Huisen grass. Because if these two directions are done well, there will be a great improvement in its yield, especially in summer.

1.We must apply micro-fertilizer well, micro-fertilizer is boron fertilizer, and potassium dihydrogen phosphate and brassin, because brassinin is a regulator, potassium dihydrogen phosphate is a strong stalk to prevent disease, and boron fertilizer is to ensure panicle differentiation.

2.The disease should be prevented and controlled in time, because this period is the period of high incidence of rust and powdery mildew, so once the initial disease is found, it is necessary to spray in time, and the prevention and control of rust and powdery mildew can be done with fluconazole or diphenyl ether patong metaconazole, the effect of dust is better, and these two agents are not selected either.

Wheat enters the jointing stage, the stem and leaves grow rapidly, and the young spikelets are differentiated, which is the period when wheat absorbs the most nutrients in its life, and the absorption, vertical and coarse harvest of nitrogen, phosphorus and potassium begins to enter the peak period. Therefore, it is necessary to strengthen nitrogen nutrition, consolidate the tillering before the year, increase the tillering and panicle rate, and cooperate with appropriate phosphorus and potassium nutrition to promote the growth of stalks, increase the number of grains, and ensure high and stable yield.

However, whether to apply jointing fertilizer, how much to apply, and when to apply it, you have to look at it three times.

A look at the seedlings, poor growth, defertilization of the plot, should be applied as early as possible to reapply green fertilizer, the general surface began to thaw can be applied nitrogen fertilizer, such as 20-30 kg of urea per mu, 40 kg of ammonium carbonate, etc. The wheat field with good growth, dark green leaf color and thick wheat seedlings can be applied less or no nitrogen fertilizer, and only phosphorus and potassium residual fertilizer can also be chased, such as 20-25 kg of phosphorus and potassium fertilizer per mu.

The second bench tomb looks at the soil fertility, the soil is fertile, and the wheat field with sufficient base fertilizer can be less or no nitrogen fertilizer, and only a little phosphorus and potassium fertilizer can also be applied. Poor soil fertility and insufficient basal fertilizer should be applied with a little more nitrogen fertilizer and phosphorus and potassium fertilizer.

In the jointing stage of wheat, the late stubble weak seedlings and the weak wheat and old and weak seedlings of the medium and low-yield wheat sets and high-yield wheat fields should be re-fertilized as soon as possible and watered to save water in the case that no fertilizer and water growth measures are taken in the regreening period or the promotion is not enough. For the strong seedlings of intensive sowing and high-yield wheat fields, on the basis of controlling the regreening, the jointing stage is generally the main attack period of fertilizer and water. Moderate or little fertilization in the early stage, and wheat seedlings have no tendency to grow vigorously, fertilization should be early and heavy, otherwise late and light.

For high-fertilizer and high-yield wheat fields, or good soil fertility, more fertilizer in the early stage, and large individuals with a strong trend line of wheat fields, fertilizer can be applied late or less water. For the late wheat planted by the single-stalk cultivation method, the fertilizer and water should be controlled at the jointing stage.

The jointing stage of wheat is an important stage of wheat growth and development, and it is a critical period for the formation of wheat yield. At the jointing stage of wheat, the nutrients and water accumulated at the seedling stage begin to transfer to the stems, leaves, and ears to supply the growth and development of wheat. Therefore, topdressing at the jointing stage of wheat is conducive to promoting the normal growth of wheat and improving the yield and quality of wheat.

Generally speaking, the jointing period of wheat is from the end of March to the beginning of April in the spring, and from mid-October to the beginning of November in the fall. Top dressing is carried out within 7 days before and after the jointing stage, generally with nitrogen fertilizer as the main fertilizer, and the application rate is 15-30 kg per mu. Top dressing at jointing stage can promote the growth and development of wheat by increasing the nutrients** of wheat, while improving the disease resistance and stress resistance of wheat.

It should be noted that the timing of top dressing of wheat should be determined according to the climatic conditions of the specific region and the growth of wheat, and it should not be blindly fertilized to avoid waste and environmental pollution. At the same time, it is also necessary to pay attention to the selection and application method of fertilizer when carrying out top dressing, so as to avoid the problems caused by excessive fertilization and non-regular fertilization.

After wheat enters the regreening stage, it will accelerate its growth, and then enter the jointing and booting stage, and the demand for nitrogen fertilizer will increase significantly. Because the bottom fertilizer of drainy wheat contains more nitrogen, phosphorus and potassium during sowing, and the demand for phosphorus and potassium nutrients in the growth process of wheat is not much during the period before the regreening period, and the phosphorus and potassium nutrients are not easy to be lost, and the demand for nitrogen is more, and the effective period of nitrogen fertilizer is relatively short, therefore, the top dressing of wheat in the regreening stage is mainly supplemented with nitrogen fertilizer. 1. Fertilizer and water application of wheat, wheat enters the jointing stage, and the distribution of grain has been completed, under the condition of sufficient fertilizer and water, wheat will gradually grow into ears with jointing, which plays a key role in the number of ears per mu of wheat in the future.

Wheat needs to use more nitrogen fertilizer in the rising period, so in the wheat rise and rise period to top dressing nitrogen fertilizer, according to the growth potential of wheat, can be topdressing urea 20 30 kg per mu, according to the seedling condition of wheat for top dressing, wheat growth should be less chasing, wheat seedlings are poor, should be in accordance with the upper limit, generally wheat in this period of root topdressing can be done once, top dressing should be done in the jointing period of the root deep application of 5-10 cm is good, can reduce the waste of chemical fertilizer. Before watering wheat, urea should be applied 3 to 5 days in advance, because urea has a process of transformation by microorganisms in the soil. 2. How to deal with the harm of wheat in the spring cold, the spring cold is more threatening to wheat, the cold resistance of winter wheat is significantly reduced after jointing, in order to prevent the occurrence of spring cold, the weather can be warmed on sunny days, and the winter wheat should be watered to increase the ground temperature before the arrival of the spring cold.

In the rejuvenation and jointing stage of wheat with potassium dihydrogen phosphate + brassinolide + a variety of trace elements foliar fertilizer, uniform foliar spraying, can play a role in enhancing wheat cold resistance, if the weather forecast is expected to be three days after the spring cold, spraying foliar fertilizer, can add 1% brown sugar to the foliar fertilizer. The soil is arid and is relatively seriously affected by the spring cold, so fast-acting nitrogen fertilizer and watering should be applied immediately after the spring cold.

Jointing fertilizer effect:1) Promote the growth of nodal roots of stems and leaves;

2) promote the growth of the middle leaf group;

3) Enhance the strength of the middle and upper leaves, consolidate the tillering and panicle;

4) Promote floret differentiation, mainly to reduce floret degradation and increase the number of seeds.

5) delay the decline of ineffective tillers;

6) May promote the elongation of the second intersegment of the base.

Fertilization Techniques:1) applied when the leaf color of the group fades;

2) when the number of stem tillers in the population decreased, Yu Zheng Shishi;

3) It is applied when the first elongated internode of the basal world noise is close to the fixed length.

Medium and strong gluten wheat should be appropriately reapplied jointing booting fertilizer. Weak gluten wheat can not be applied booting fertilizer and should control the application rate of jointing fertilizer, to the total amount of n less than 15%-20%, not later than the inverted 3 leaves.

Wheat enters the jointing stage, and vegetative growth and reproductive growth go hand in hand. At this time, the demand for water and fertilizer is very large, and sufficient nutrients and water can be conducive to the growth and development of wheat. Once the water and fertilizer ** are insufficient, the panicle rate of wheat will be greatly reduced, resulting in reduced yield, etc.

Therefore, according to the specific situation of the wheat field, we must do a good job in the management of water and fertilizer at the jointing stage to ensure the growth and development needs of the plants, so as to achieve the purpose of a bumper harvest. In order to prevent and control sheath blight, the growth of wheat at the regreening stage of wheat consumes less water, and watering is not conducive to wheat growth.

Returning green manure can effectively promote the growth of wheat, increase spring tillering, and promote ear formation. Therefore, the rejuvenation water is suitable for wheat fields with severe drought conditions, and the rejuvenation manure is suitable for wheat fields with insufficient population. Wheat fields with insufficient populations should be fertilized.

Fertilizer water at the initial stage does not increase the total tillering amount, but can increase the panicle formation rate, thereby increasing the number of ears per mu. For wheat fields with medium or large water content, water and fertilizer management will cause adverse effects such as too large population, too long basal internodes, too large middle leaves, and easy lodging.

Therefore, it should not be used, and wheat fields that have been watered with green water should not be used at the same time. Wheat is in the jointing and booting stage, and the demand for water and fertilizer is very high, which is the most critical period to determine the wheat yield in this season. Both the number of spikes per mu and the number of grains per spike were formed during this period.

Therefore, for wheat growers, the management of this period is crucial. You can choose thiofuramide, enazole or propiconazole, among others. , and when spraying, it is best to spray the medicine on the roots of the wheat, so that the effect will be better.

As for spider mite control, the best time to spray is when most of the leaves are covered with white spots. 2% avermectin perchlorine EC 3000 4000 times liquid evenly sprayed, the control effect can reach more than 90%. It can also control pests such as aphids, and the problem can be solved at one time.

Some friends take a fancy to the use of regreening fertilizer, watering and fertilizing wheat during the regreening period, and ignoring the water and fertilizer management during the jointing and booting period, and the yield is definitely not good. Because you may be in a situation of greedy green growth after fertilizing during the greening period, and when you need to fertilize during the jointing and booting stage, the fertility in the soil may not be reached.

Apply jointing fertilizer, watering watering, dryland wheat fields can borrow moisture top dressing. Pay attention to weather changes to prevent spring cold; Comprehensive control of pests and diseases, mainly wheat aphid, wheat spider, rust, powdery mildew, sheath blight, scab, etc., to do a good job of forecasting, at any time pay attention to the dynamics of pests and diseases. If the prevention and control indicators are met, prevention and control should be carried out as soon as possible.

Strengthen water and fertilizer management, give wheat sufficient water and nutrients, and promote its growth. It is also necessary to do a good job of insecticide, the diseases and insects during the jointing period are very harmful to wheat, and will seriously damage the young leaves and stems of wheat.

<> wheat can be sprayed evenly with 70-80 ml of chlorofluoropyropyroxyacetic acid emulsifiable concentrate and 30 kg of water after jointing, and broad-leaved weeds such as lacquer and pig can be controlled after spraying. After the jointing period of wheat to the booting stage is the period of reproductive growth and vegetative growth, and it is also a more fragile and sensitive period in its life.

1. What herbicides can be used after wheat jointing

1. Weeding. 1) 70-80 ml of chlorofluoropyropyroxyacetic acid emulsifiable concentrate per mu, mixed with 30 kg of water for uniform spraying, after spraying, it can control broad-leaved weeds, such as lacquer, pig damage, etc.

2) Wheat should be manually weeded as much as possible after jointing, because after the jointing period to the booting stage is the period of common development of wheat reproductive growth and growth tolerance, and it is also a more fragile and sensitive period in the life of wheat.

3) If the drug is not used properly, the growth of wheat will be inhibited, the tillering will die, the wheat ears will be deformed, or the plants will not tassel and do not set grains, and finally the yield will be reduced.

2. Insect removal. 1) The spraying time is the rejuvenation jointing stage.

2) To control wheat spiders, spray 3000 times of 1% avermectin, or 3000 times of 15% pyridafen emulsifiable concentrate.

3) To prevent and control sheath blight, 75-100 kg of water should be mixed with 150-200 ml of 5% well gangmycin per mu, and then the base of the wheat stem should be sprayed every 10-15 days.

4) To control underground pests, use 40-50 ml of 48% Lesben EC (or 50% phosphine EC) mixed with 75-100 kg of water per mu, and then spray the base of the wheat stem.

2. What fertilizer is used in the jointing stage of wheat

1. Suitable moisture.

1) For the spring fields with suitable moisture, sufficient population, high soil fertility level, solid sowing foundation, watered with overwintering water before winter, and strong individuals (i.e., "good wheat roots"), 10-15 kg of urea per mu can be applied in combination with watering in the middle and late stages of jointing.

2) After fertilization, it can prevent excessive consumption of nutrients by wheat plants due to tillering, avoid excessive population scabbing in the field, aggravate diseases and pests, and at the same time, promote wheat root rooting, enhance drought resistance and lodging resistance, and delay premature senescence in the later stage.

2. Poor moisture.

1) For the sand and thin land with late sowing, poor moisture, unwatered overwintering water, insufficient population, less individual tillers, and average or poor soil fertility level, 8-10 kg of urea per mu can be applied in combination with watering, and 5-7 kg of urea per mu can be applied at the end of jointing.

2) After fertilization, it can promote tillering in spring, transform seedling conditions, and improve the tillering and panicle formation rate.