After sowing chives, when can I start fertilizing?

Fertilization should be mainly to promote leaf growth, and fast-acting nitrogen fertilizer should be applied. Spring sowing and summer harvesting of onions, fertilizer and water management should be promoted to the end. After the seedlings begin to grow vigorously, they should be applied with fast-acting nitrogen fertilizer every 20 days or so, combined with an appropriate amount of phosphorus and potassium fertilizer.

Employ. Ammonium sulfate can be applied per mu.

About 15 kg. Before the spring seedlings overwinter, the fertilizer and water should be properly controlled to prevent the seedlings from being too large before winter and a large number of early sprouts in spring. After the green onion seedlings turn green, they will be watered in time, and then green manure will be applied to promote the early growth of the seedlings. Urea can be applied per mu.

or other equivalent nutrients of nitrogen fertilizer about 15 kg. Winter and spring, shallots.

It can be covered with plastic film or transplanted in a small arch shed, which can maintain the temperature and promote nitrogen, phosphorus, potassium and trace elements in the whole seedling.

Balance**. If onion plants cannot use nitrogen fertilizer alone, biogas slurry or 5 kg of buried nutrients per mu should be applied as tillers in time.

Fat. Due to the weak ability of tillers to absorb fertilizer and water, they are intolerant to concentrated fertilizers, drought and waterlogging, so they must apply fertilizer and water less and frequently.

Shallots are prone to boron fertilizer deficiency, and when topdressing, 1 kg of boron fertilizer per mu should be combined with urea and potassium chloride.

The compound fertilizers are mixed and then ditched together, or the fertilizer is sprayed when topdressing. Fertilization and watering are combined to keep the soil moist. The amount of nitrogen fertilizer and potassium fertilizer required in the growth process of leeks is basically the same, so on the basis of increasing organic fertilizer, the amount of potassium fertilizer should be increased, and the amount of potassium fertilizer per mu of leeks should not be less than 25 kg per season.

At the same time, due to the fluidity of potash fertilizer, the amount of potassium fertilizer per mu should not exceed 10 kg at a time. In order to promote the normal growth of shallots, trace element foliar fertilizer should be sprayed on the leaves to meet the demand for medium and trace element fertilizer for the growth and development of shallots.

On the basis of increasing the amount of organic fertilizer, the amount of potassium fertilizer should be increased. It is recommended that the amount of potassium fertilizer applied to shallots should not be less than 25 kg per quarter. Potash fertilizer has the characteristics of fluidity, and the amount of potassium fertilizer applied per mu should not exceed 10 kg.

In order for the shallot to grow normally, trace elements need to be sprayed on the leaves to meet the demand for trace element fertilizer during the growth of the shallot. For some seedlings with weak growth process, fertilizer can be applied separately, but the amount of fertilizer must be controlled. If there are too many, it is easy to burn the seedlings, do not spray too many pesticides and water at once.

If there is too much water, the seedlings can easily die.

After the chives are sown, they should wait until they grow seedlings about 5 cm before fertilizing. You can't fertilize them before they come out, it will be easy to burn them to death, and you can't fertilize them when they are too small, and they will also burn easily.

Spring-sown chive seedlings should be fertilized after they begin to grow, do not be afraid of fertilizer damage, it is very fertilizer-loving. Fertilization is mainly nitrogen fertilizer, mixed with phosphorus and potassium fertilizer, about once every 20 days.

Top dressing can be divided into several times, but it is best to be able to organic fertilizer, that is to say, the bottom fertilizer can choose organic fertilizer, so it will be better, bury these organic fertilizers, about 15 cm, then these green onions can grow very well. Organic fertilizer is generally chosen to be composted before planting, and burying the ashes of chicken manure, cow manure, pig manure, etc., or some burning branches and weeds, can help the absorption of these green onions. In fact, this is also the first fertilization, if you plant green onions, you can have more than 4,000 catties of organic fertilizer per mu, at least you can save a lot of chemical fertilizer.

When the green onions have sprouts, they should be fertilized after a week or so. The implementation of fertilizer should also be based on the performance of the green onion, if the green onion grows particularly lush and green, and there is no lack of nutrition, then it can be appropriately postponed, after all, there is organic fertilizer as the foundation, basically able to meet the growth needs of green onions, for some phosphate fertilizer, potassium fertilizer can be appropriately supplemented. <>

In the middle of the green onion, it should be topdressed, because it will be sold later, and this fertilizer must be supplemented in time in the rapid growth stage, which can be used urea or other compound fertilizers. If you choose urea, each mu is about 60 catties, of course, planting green onions generally need a certain amount of plant ash, if there is grass ash that is the best, about an acre needs about 200 catties. <>

It is best to choose water-soluble fertilizer, non-water-soluble fertilizer is easier to irrigate, and it is also very good to spray it directly with water. Of course, some people will choose to top dressing at the autumn equinox, in fact, it doesn't matter if you choose to top dressing in autumn, after all, this period is generally a period of green onion formation, and a lot of nutrients are definitely needed, so timely supplementation can make green onions grow faster and more stably.

Top dressing is the need for field management throughout the whole growth cycle of green onions, and top dressing should be used in small quantities many times, according to different geology, green onions are full.

It is recommended to top dressing once in 7-15 days.

If the geology is hard, you can choose to top dressing once in 15 days, if the geology is soft, you can top dressing once in about 7 days, the shorter the interval, the less fertilizer is used.

Green onion topdressing is divided into the beginning of autumn, after the white dew, after the frost, in these stages to pay attention to the top dressing of green onions, the method of topdressing should be good with water and fertilizer, avoid large water and nitrogen.

In early September, or around May in the spring, the topdressing method of green onions is relatively simple, and it is also relatively easy to breed.

It needs to be determined according to the growth of green onions, and it is definitely necessary to fertilize in the early stage, and top dressing is also needed in the growth period of green onions, so as to ensure the growth of green onions.

Shallots. After planting, nitrogen fertilizer should be the main fertilizer, with an appropriate amount of phosphorus and potassium fertilizer.

Spring sowing and summer harvest of shallots, in the management of fertilizer and water, to promote to the end, after the seedlings begin to grow vigorously, generally every 20 days or so, apply 1 time Bika high nitrogen water-soluble fertilizer, with the application of an appropriate amount of phosphorus, potassium fertilizer, ammonium sulfate can be applied per mu each time.

About 15 kg.

For the green onions sown in autumn and overwintering, the fertilizer and water should be properly controlled before the green onion seedlings are wintered, so as to prevent the seedlings from being too large before winter and a large number of early sprouts occur in spring.

After the green onion seedlings return to green, they should be watered back to green water in time, and the green fertilizer should be applied to promote the early growth of the seedlings, and urea can be applied per mu.

15 kg or other nitrogen fertilizers with equivalent nutrients.

After that, about 15 kg of ammonium sulfate per mu should be applied every 20 days, combined with top dressing, and fully watered to strengthen vegetative growth, prevent or delay sprouting, and improve the yield of shallots.

Regarding the fertilization of shallots, the bottom fertilizer is best to use nitrogen, phosphorus and potassium fertilizer with organic fertilizer and medium and trace element fertilizer together, and phosphorus fertilizer needs to be supplemented at the seedling stage, and a certain amount of nitrogen and potassium fertilizer is required at different growth stages.

In short, the fertilizer of shallots is still based on nitrogen, phosphorus and potassium fertilizer, which can be applied Wandibao 16-13-16 pure potassium sulfate, using imported potash fertilizer as raw material, fully water-soluble, no residue, fast crop absorption, long fertilizer effect, vigorous plant growth, high yield, adding a large number of microelements, according to the nutritional elements required for crop growth design formula, tailor-made, top dressing can make the fruit colorful, fast fruit expansion, fruit shape upright, fruity flavor.

Compound fertilizer and urea can be used for top dressing of shallots, but compound fertilizer is generally appropriate, because urea contains biuret, which is easy to lead to seedling burning if used improperly, while compound fertilizer is safer and more comprehensive in nutrients. The growth period of green onion seedlings is usually 2-3 months, transplanting can be topdressing for about 1 month, 10 kg of urea and 20 kg of compound fertilizer can be applied per mu during the peak tillering period, and 30 kg of compound fertilizer can be applied per mu after the harvest of the first green onion leaves.

After planting, shallots should be mainly nitrogen fertilizer, with an appropriate amount of phosphorus and potassium fertilizer. to enhance vegetative growth and increase shallot yield.

In the process of growing green onions, it is best to minimize the use of chemical fertilizers. In particular, ether belongs to the chemical fertilizer category, which is a powerful chemical fertilizer, once it is not properly blended, the concentration is too high, and it is easy to burn the roots. If you don't master foliar fertilizer spraying, hot weather, and temperature spraying, it is easy to burn dead leaves.

Long-term use of urea root application, the chemical components penetrate into the wave body with water, and the chemical components remain, resulting in the bitter taste of green onions, which directly affects the quality of green onions, and the final result is eliminated by the market.

Prevention and ** pests and diseases are basically rare chemicals, and the prevention of pests and diseases is mainly grass and trees roasted with straw. The partition can be sprayed directly with grass and wood in the morning when there is dew, or soaked in water with grass and wood, and sprayed with broken leaves at night, which plays a role in supplementing nutrients and completely preventing various pests and diseases.

Green onions are one of the vegetables that are often grown in rural areas. It can be used as a vegetable or as a condiment. There are many varieties of green onions, and there are many varieties by region.

However, the management of their cultivation is much the same. I don't think it takes a lot of chemical fertilizer to grow green onions. Chemical fertilizers have a certain role in promoting and supplementing the whole process of green onion growth, let me talk about the cultivation and fertilizer of green onions.

In addition to planting plastic greenhouses, green onions grown in the natural environment can be planted in spring, summer, autumn and winter in addition to winter. Usually spring planting can be sown after the soil has thawed. Summer planting (because summer belongs to Fukukawa) is called Fupa, and it is planted from July 20 to August 9 and 10 every year.

Autumn planting is generally best done earlier. Generally, it is sown in early September of the current year, fixed in early May of the following year, and harvested before winter.

Green onions are easy to sow, but not neglected. The quality of its production is also lush. When planting shallots, it is necessary to combine the local climate, soil, temperature and humidity and other environments to choose varieties suitable for local high-quality and high-yield cultivation. Multiple varieties and a small number of trial varieties can also be used, and suitable varieties can be screened.

There are no special requirements for the soil environment when growing green onions. But to grow high-quality green onions, the soil should be fertile and maintain the ability to release fertility. Second, the soil should not be too dry or too wet, and the soil moisture should not be above 20% 35% to 40%.

Third, only good soil permeability can ensure the normal growth of roots and maintain long-term stable fertilizer absorption capacity.

1. Green onion seedling period: 60-70 days of green onion seedlings in spring and summer, and 150 days of seedling cultivation (greenhouse film protection) in autumn and winter. The seedling field should be subsoiled and leveled to ensure air permeability, and the soil aggregate structure should be good, and there should be no grass and large soil clods.

When planting, whether it is braided rope planting or sowing seeds to cover the soil, it is necessary to use base fertilizer. The base fertilizer is superphosphate + bacterial fertilizer + balanced ternary compound fertilizer or calcium, magnesium and phosphorus + bacterial fertilizer + balanced ternary compound fertilizer.

Reminder: Green onion seedlings like nitrogen and phosphorus, rush to apply fruits and vegetables to take root and strengthen seedlings (25-15-10), cultivate strong seedlings, and lay the foundation for high yield. Do not use rooting agents, otherwise the root system will grow lush and it will be difficult to emerge.

2. Green onion transplanting slow seedling period: from transplanting to the birth of three new leaves until the slow seedling period, during this period to sprinkle bottom fertilizer and then ditch. Balanced ternary compound fertilizer + superphosphate + bacterial fertilizer + potassium fertilizer for base fertilizer.

Green onions are not strict with light requirements, and the current green onion varieties are mainly medium-leaf onions, so they must be densely planted to achieve high yields, usually 26,000 to 30,000 trees per mu, that is, 33 to 35 trees per meter. Green onion leaves are drought-tolerant and the roots are not drought-resistant, the roots are string-shaped fibrous roots, the root division ability is weak, the root hair is less, the ability to absorb water and fertilizer is weak, the roots need to be raised after transplanting, and the root is irrigated with chitin chelated copper + phosphine + pyrethrin + pyrethrin to root and prevent maggots.

The four topdressing of green onions are: the first topdressing at the beginning of autumn; When the heat is in the summer, it is the second time to apply fertilizer; Apply the third fertilizer at the time of white dew; At the time of the autumnal equinox, it is the fourth time to apply fertilizer.

During the period from the beginning of autumn to the white dew, it is the vigorous growth period of green onion leaves, it is necessary to apply leaf fertilizer to ensure the growth of leaves, ensure the photosynthetic nutrition of green onions, and can be applied on the back of the ditch when fertilizing, and then watering after fertilizing and soil mixing.

It takes about 40 days from the green of the chives to the first knife (when the plant height is 30 50 cm), about 30 days for the second knife, and about 25 days for the third knife. Harvesting chives should be carried out in the early morning or evening on a sunny day, the knife edge of the green onion is 2 3 cm from the surface and the knife edge is neat and consistent, after each harvest, the ground is raked with a rake, and the wound of the green onion is healed after 3 days, and the new leaves are about to be watered. Do not harvest during the summer solstice to prevent the seedlings from dying.

In general, it takes 60 to 80 days from sowing to harvesting the first crop.

Green onion topdressing time.

Green onion topdressing is divided into the beginning of autumn after the wax, after the white dew, after the frost, in these stages to pay attention to the green onion topdressing.

1. After the beginning of autumn: the root absorption function of green onions has turned into a vigorous period, and the principle of watering is "light watering, morning and evening watering", combined with watering and applying "leaf attack fertilizer", 1500 kg of rotted farmhouse fertilizer per mu, 20 25 kg of superphosphate, and 10 kg of potassium sulfate.

2. After the white dew: the green onion enters the green onion white formation period, which is the key period of fertilizer and water management, in the white dew to the autumn equinox, the top dressing is mainly based on the fast-acting nitrogen fertilizer, and the urea is good, and it is advisable to apply about 20 kg per mu, and 15 kg of potassium sulfate is added.

3. After frost fall: the growth of green onion leaves is becoming slower, the transpiration of foliar water is reduced, watering should be gradually reduced, and watering should be stopped 7 to 8 days before harvest to improve the storage resistance of green onions.

When is it good to top dressing green onion seedlings.

If the seedbed of green onion seedlings is applied with sufficient base fertilizer, there is generally no need for top dressing, to prevent the seedlings from being too large or long, if the seedlings are small and the base fertilizer is insufficient, they can be topdressed with watering frozen water 1 time.

When to top dressing during the growth period of green onions.

The amount of nitrogen absorbed by green onions during the peak growth period was higher than that of potassium, and the absorption of potassium was higher than that of nitrogen when entering the leaf sheath fullness stage. In the formation stage of green onion, the application of potassium fertilizer should be strengthened, in addition to nitrogen, phosphorus and potassium, timely spraying of Turin in the ground fruit to thicken the nutrient transport duct of underground fruit, improve the expansion vitality of the fruit, the fruit shape is robust, and the quality and yield are high.

Top dressing fertilizer for green onions.

1. The base fertilizer of green onions is mainly rotting organic fertilizer, and 3000 4000 kg of decomposed compost or manure per mu, 30 40 kg of superphosphate, 20 kg of potassium sulfate or 100 kg of plant ash are applied. It is sprinkled before land preparation, and plowed into the soil, and then shallow tillage and fine raking to make the fertilizer and soil fully mixed.

2. The topdressing of green onions should grasp the principle of light before, medium and heavy, and supplement, which should be combined with cultivating, soil cultivation and watering. The beginning of autumn to white dew is the vigorous growth period of green onion leaves, and it is necessary to apply "leaf attack fertilizer" to ensure the growth of leaves and promote the high quality and high yield of green onions.

High-yield topdressing method of green onions.

1. Green onion fertilization is divided into two stages: seedling period and green onion growth period after planting, the main task of fertilization during the seedling period is to cultivate strong seedlings, and the main task of fertilization after planting is to improve the yield and quality of green onions.

2, the seedling period to pay attention to the application of base fertilizer, generally 667 meters 2 2000 3000 kg of high-quality miscellaneous fertilizer, circle fertilizer and 40 60 kg of superphosphate as base fertilizer, sprinkled on the ground before land preparation, and then shallow tillage and fine rake, so that the fertilizer and the soil are fully mixed after leveling and sowing.

3. In order to control the seedlings in the overwintering period of autumn seedlings will not be too large, generally do not apply fertilizer before wintering, and in order to ensure the safety of seedlings during the wintering period, when the soil begins to freeze, a small amount of nitrogen and phosphorus fertilizer can be applied in combination with watering overwintering water.