How many catties of potassium fertilizer are used for the tip of rice seedlings to turn yellow?

If it is caused by potassium deficiency, about 15 kg of potassium fertilizer can be applied per mu.

Recommendations for potassium fertilizer application in rice:

1. Apply compound fertilizer to base fertilizer. After entering jointing and booting, that is, after rewatering in the sun, potassium chloride is applied at the level of the same amount or slightly less than the amount of urea. It is necessary to flexibly grasp the time and quantity of fertilization according to the seedling condition (seedling density, growth, leaf color, etc.), the pre-fertilization situation and soil fertility.

If there are symptoms of potassium deficiency, according to the severity of the occurrence, the top dressing of potassium fertilizer ranges from 8-12 catties.

2. Top application of potassium fertilizer. It must be applied after the dew is dry in the morning or before the dew starts in the afternoon to avoid severe burns on the leaves caused by the application of (potassium) fertilizer after the dew has not dried.

3. In the event of potassium deficiency red blight, it is recommended to take intermittent moist irrigation to increase soil permeability, promote the formation of new roots, and establish a shallow water layer of 3 cm to protect seedlings in the event of high temperature. If the disease of rice seedlings is severe, sodium nitrate phenol or amine fresh ester plus potassium dihydrogen phosphate should be sprayed to supplement nutrients and improve root vitality.

4. In the case of potassium-deficient flax leaf spot, benzoconazole, oxime strobin tebuconazole, benzopyrazole, chunlei tebuconazole and other agents can be used to control it, and phosphorus and potassium fertilizers such as potassium dihydrogen phosphate can be added to supplement potassium fertilizers.

Potassium is one of the three essential nutrients for rice growth, and the ratio of nitrogen, phosphorus and potassium requirements is about 2 1 2, and most areas of rice in southern China are seriously deficient in potassium, so potassium fertilizer needs to be increased. Potash fertilizer, the full name of potassium fertilizer. Fertilizers with potassium as the main nutrient generally account for potassium in plants, second only to nitrogen.

In the process of plant growth and development, potassium participates in the activation of more than 60 enzyme systems, photosynthesis, transportation of assimilation products, metabolism of carbohydrates and protein synthesis.

If you want to supplement potassium fertilizer, you can apply about 16 catties of potassium chloride; When the grain grows after the later stage of fruiting, 150 grams of potassium dihydrogen phosphate can be sprayed into the paddy field with 60ml of water to ensure the seed setting rate of the rice in the later stage.

The specific amount of fertilization per mu of rice depends on its growth.

This is to be proportioned according to the brand description of the potash fertilizer you buy, and the potassium content of each brand is different.

If you ask him about the amount of potassium fertilizer used in the car, it should be between 15 and 30 catties, which is completely okay, and it is okay to achieve a good use effect according to different situations.

In this case, you should be able to use between 15 and 25 catties, which is perfectly fine and there will be no problems.

Summary. Dear, I'm honored to have your question The information that the teacher found for you here is: How many catties of potassium fertilizer do you need for a mu of rice seedlings:

Rice seedlings need 15 kg of potassium fertilizer according to the needs of the rice growth period, and generally about 15 kg of potassium fertilizer per mu of rice. This depends on the content of potassium ions and available potassium in the soil, with a high level of 10 kg per mu and a low case of 15-20 kg. To plant rice, 1 acre of land is usually covered with 5-12 kg of potassium fertilizer.

In general, if 5 kg of potassium chloride is to be applied per mu, it is suitable for topdressing at the beginning of rice tillering; If 10 kg of potassium chloride should be applied per mu of late rice.

Dear, I'm honored to have your question The information that the teacher found for you here is: how many catties of potassium fertilizer do you need for a mu of rice seedlings: Rice seedlings need 15 catties of potassium fertilizer for an acre, and according to the needs of the rice growth period, generally about 15 catties of potassium fertilizer are needed per mu of rice.

This depends on the content of potassium ions and available potassium in the soil, with a high level of 10 kg per mu and a low case of 15-20 kg. To plant rice, 1 acre of land is usually covered with 5-12 kg of potassium fertilizer. In general, if 5 kg of potassium chloride is to be applied per mu, it is suitable for topdressing at the beginning of rice tillering; If 10 kg of potassium chloride should be applied per mu of late rice.

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Do not add pesticides.

Qinqin agricultural products are not about using pesticides and fertilizers, but about whether these pesticides are used correctly and whether the content of residues is high.

What is the best owner.

Kiss Dupont DuPont Agrochemical.

If we don't have DuPont agrochemical here, do we have any other brands?

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Hello, planting 1 acre of rice usually applies 5-12 kg of potassium fertilizer. In the same case, if 5 kg of potassium chloride is to be applied per mu, it is suitable for topdressing at the beginning of rice tillering; If 10 kg of potassium chloride is to be applied per mu of late orange rice, it should be divided into 2 times to apply, the first time can be applied before transplanting, and 6-7 kg per mu can be applied at this time; The second application is at the tillering stage, at this time 3-4 kg per mu can be applied.

In daily management, it is necessary to track the timely control of temperature and water level. Timely inspection of the management of water and fertilizer and the prevention and control of pests and diseases. It is necessary to strengthen the management of water fan wild fertilizer in time, and timely spray the foliar surface with Bihu, or brassinin and alginic acid or American star relief, so that rice seedlings can quickly return to normal growth.

It is necessary to pay attention to the timely release of the wind and the film to refine the seedlings, and the seedling seedbed should not be excessively short of water, nor should it be watered too much. It also sprays Bihu, or brassinin and alginic acid, or American star and potassium dihydrogen phosphate in time to alleviate it, enhance stress resistance, disease resistance, and promote rapid recovery.

Summary. Hello, 1. Lack of pigment yellowing.

Nitrogen deficiency yellowing. It starts with the tip of the old leaf and gradually spreads from the stem to the heart leaf, and finally develops to a yellow-green color.

What is the reason why some rice seedlings in the paddy field are yellow and taller?

Hello, 1. Lack of nutrients is yellow, lack of nitrogen is yellow. At first, the tip of the broad piece of the old leaf core begins to turn yellow, and then gradually extends from the stem and leaf to the heart leaf, and finally develops to the whole plant into yellow-green celery.

2. Poisoning with yellow hydrogen sulfide poisoning. The root system is black, and there is the smell of rotten eggs, and the white roots are few and thin; The old leaves at the base are yellow-brown, and the leaf tips 3, fertilizer damage or pesticide damage are yellow, ammonium carbonate, ammonia, pesticides, etc., if improperly applied, it will cause poisoning and yellowing, resulting in lumps of rice leaves smoked into bright yellow or golden yellow, and sometimes there are scorching spots on the yellow leaves. Scorched, then the old leaves died, and only 1-2 new green leaves remained in the upper part of the dull calendar.

Reading the hood belt. 4. Disease infection, yellow and white leaf blight, yellow leaf blight; In addition, the appearance of brown spots on the leaves of rice seedlings may also be caused by diseases such as rice blast and flax leaf spot. For these two diseases, rice blast, chunleimycin, prochloraz and other drugs can be used to prevent and control these two diseases. 5. Physiological premature aging of yellow leaves due to the decline of root vitality in the later stage of rice biology, or a physiological phenomenon of yellow leaf collapse related to varieties.

Knowing that the original infiltration of rice seedlings yellowing is due to the extremities, the fertilizer should be quickly applied with hidden fertilizer, and those that can be saved should be saved as much as possible, and the weak seedlings should be given up if they are not good, after all, the strength of rice seedlings is related to the future rice yield, and it cannot be ignored. Cong Shi.

Foliar fertilizer of rice ** is not suitable for wheat.

Wheat Cultivation Techniques:

The crop grows well on both acidic and slightly alkaline soils, but the most suitable soil pH is to.

Farming and land preparation.

The land preparation of the crop in the dry land should be based on the deep tillage layer year by year, combined with the application of organic fertilizer, and the improvement of water and fertilizer conservation, and the land preparation should be carried out according to different multiple cropping forms. That is, the previous harvest is earlier, such as spring corn, sorghum, tobacco, etc., the harvest should be shallow ploughing and stubble first, and then deep turning the kang soil, so that the residue is rotten and accept the autumn rain, shallow rake after the rain, reduce evaporation; The other category, such as sweet potato, cotton, etc., has a tight harvest time, and if the conventional method is used, it is bound to delay the sowing date, which is one of the important reasons for the low yield of the crop in the southwest region. Therefore, on the one hand, the implementation of loosening soil and moisture between the rows in the previous crop and later period, and then plowing and leveling when planting wheat; On the other hand, it is advocated to dig potatoes, level the ground, fertilize, sow and other continuous operations to ensure that the crop is sown in a timely manner.

High-yield technology. 1. Pay attention to the selection of high-fertilizer and water plots. High-yield and high-quality crop varieties require that soil nutrients must be comprehensive and sufficient to meet the needs of high-yield cultivation, so it is advisable to choose plots with high soil fertility and good watering conditions, increase organic fertilizer, and adopt formula fertilization technology and lack of wax withering.

2. Pay attention to late sowing at the appropriate time, and determine the appropriate basic seedlings according to the characteristics of the variety. It is necessary to prevent excessive sowing volume, resulting in passive post-management.

3. Pay attention to prevent lodging and reapply jointing fertilizer. Some of the high-quality crop varieties promoted are not resistant to lodging, especially for wheat fields with too large groups, a chemical control treatment must be carried out before returning to jointing, and paclobutrazol or wheat yefeng can be sprayed. It is necessary to reapply jointing fertilizer to control the formation of excess falling ears and promote large ears and more grains.

4. Pay attention to watering grouting water, wheat yellow water, and spraying foliar fertilizer to prevent premature aging. Locally buried grouting water plays an important role in increasing granularity weight and preventing dry and hot air. In dry weather, the use of wheat water is conducive to intercropping and preventing premature aging.

In the first half of May, combined with the prevention and control of pests and diseases, spray 2 to 3 times of foliar fertilizer, such as potassium dihydrogen phosphate, which can reduce the harm of dry and hot air and increase yield.

5. Pay attention to the prevention and control of pests and diseases. Generally speaking, high-quality crops are more susceptible to pests and diseases, such as sheathrody and powdery mildew, and aphids occur earlier and heavier than conventional varieties. It should be prevented and treated as soon as possible according to the forecast.

6. Spray the crop treasure once when the crop has just broken and reached about 60% to 70% before heading and flowering, so as to activate the biological enzyme activity in the crop, promote coordinated growth, enhance the photosynthesis of functional leaves, significantly reduce the empty stubble rate, improve the seed setting rate and 1000-grain weight, so as to achieve the effect of increasing yield.

Fertilization should not be excessive, just appropriate. In the management of rice seedlings, it is necessary to pay attention to the coordination of the relationship between oxygen, water and temperature, which is the key to the technology of dry breeding and strong seedlings of rice. The first is to prevent the temperature in the shed from being too high to breed weak seedlings, the second is to prevent low temperature and water shortage from breeding small old seedlings, and the third is to prevent the temperature from rising and falling to cause blight and cause dead seedlings.

During the week from sowing to emergence, the weather was cooler. The large and medium sheds are mainly sealed and insulated, and care should not enter and exit with cool breezes. Try to extend the first and second watering time, that is, after the seedlings come out, do not water first, and then water the first time when the seedbed soil is hard to touch.

After watering, water again when the bed soil is very dry.

When the seedlings are one and a half leaves, they begin to ventilate and refine the seedlings, and the squatting seedlings prevent them from growing. Generally, as the seedlings get bigger and the weather gets warmer, gradually extend the ventilation time and increase the ventilation openings. When the seedlings are one and a half leaves to two and a half leaves, it is an important time to prevent the seedlings from getting diseases, and it is necessary to focus on preventing the occurrence of bacterial wilt and blight.

Rice is easy to lack fertilizer after 2 and a half leaves, and the leaves of seedlings will generally turn yellow and not so green, at this time, we should pay attention to fertilization once, you can use Yanwo potassium dihydrogen phosphate + Yanwo zinc fertilizer, the effect is better.

Rice seedling disease. The diseased plants at the seedling stage are mostly slender, thin, elongated leaf sheaths, light color, narrow leaves, and poor root development. A few diseased plants were shorter than healthy plants, most of the diseased plants died at the seedling stage, and a small number of diseased plants died within 25 days after transplanting.

Rice occurs from the seedling stage to the heading stage. The diseased seedlings often wilt and die, and the diseased seedlings that have not died are pale yellow-green, with slender growth, and generally about one-third higher than the healthy plants; The roots are poorly developed, with little or no tillering. Symptoms began to appear about 30 days after transplanting in the field, the leaf color of the diseased plant was pale yellowish-green, the internodes were significantly elongated, the nodes were curved, and they turned light brown, and many inverted fibrous roots were born on the nodes.

Severely diseased plants generally die before heading.

During the prevention period, spray with 1500 times of 25% prochloraz emulsifiable concentrate at the seedling needle stage. After the diseased plants were found in the field, 300g of 5000 times of benzo*propiconazole emulsifiable concentrate was added to 20ml of the product "Half Sun" developed and recommended by plant protection experts of Northwest Agricultural University, mixed with 15kg of water, and sprayed evenly on the foliar surface 1--2 times.