What fertilizer should be applied before ploughing in a vegetable greenhouse?

Well-rotted farmyard manure is best.

Sterilized·· Green manure in the farmhouse.

Many farmers are mainly chemical fertilizers whether they are flushed or topdressed, and many chemical fertilizers are not suitable for application in sheds. Do not apply ammonium sulfate in greenhouses, and prohibit the application of ammonium carbonate. Ammonium sulfate is a physiological acidic fertilizer, which will increase the acidity of the soil and destroy the soil structure after application.

At the same time, do not apply more diammonium phosphate in the vegetable greenhouse in winter, because although vegetables need a lot of nitrogen and potassium, they need less phosphorus. In addition, it should be noted that diammonium phosphate should not be mixed with alkaline fertilizers such as plant ash, so as not to cause ammonia volatilization and ammonia damage.

<> farmyard manure as a natural fertilizer is very beneficial for the growth of vegetables. However, care should be taken to maintain full maturity when applying farmyard manure. If it is not ripe, farmyard manure will produce large amounts of ammonia.

This plant is also easy to burn the roots, resulting in a variety of pests and diseases, the temperature and low temperature of the shed in winter are relatively low, vegetables grow in this environment, the root system of fertilizer absorption and utilization rate is relatively low, if it is still in accordance with the conventional amount of fertilizer, then it will lead to a large amount of fertilizer accumulation in the soil, so that the soil solution concentration is too high.

Among winter crops, cruciferous crops account for a large proportion, such as cabbage, cabbage, radish, rape, etc., which are particularly sensitive to boron. At the same time, celery, carrots, etc. are also sensitive to boron. Boron deficiency not only seriously affects reproductive growth, but also vegetative growth hits a wall, if you want to fertilize according to the conventional amount, it is easy to lead to a large amount of fertilizer accumulation in the soil, so that the soil solution concentration is too high, vegetable roots are easily damaged, there is a situation of burning red roots, serious will lead to leaf atrophy or berries and dead trees.

During this period, the greenhouse vegetables grew rapidly, and many vegetable farmers ignored the internal temperature of the greenhouse in order to pursue the yield. After winter, the temperature difference between day and night in the vegetable greenhouse changes greatly, the light is sufficient during the day, the temperature of the film is closed quickly, and the warming effect is poor on rainy days. Do not use too much diamine phosphate in the greenhouse in winter, so as not to cause the volatilization of ammonia and cause safety hazards.

4. Carefully disperse in the greenhouse and apply phosphorus-containing green onions is fertilizer and phosphorus fertilizer, which is suitable for chicken fertilizer or concentration in the early stage of vegetables, and is suitable for soil with dense root system.

Do not use chlorine fertilizers, reduce the quality of vegetables, reduce yields, do not fertilize under dry conditions, vegetables are water-loving crops, the soil should not eat iron fertilizer or rare earth, do not eat a large amount of diammonium phosphate, do not use potassium fertilizer in the later stage of growth, do not apply unrotted cake powder, do not use ammonium sulfate or ammonium carbonate, which is not conducive to the growth of vegetables.

When planting greenhouse vegetables, we must pay attention to the temperature and humidity of the vegetables, and we must choose rainy or cloudy days when fertilizing, because if you fertilize in this way, you don't need to bite a handful of vegetables to death.

When fertilizing, the plastic sheet must be removed, and the ventilation must be maintained, so that the fertilizer will be fully absorbed.

In the case of good ventilation of the greenhouse in spring, summer and autumn, the general three-element compound fertilizer can be used, which is labor-saving and labor-saving with water.

In winter, especially in the depths of winter, the temperature in the shed does not allow long-term ventilation under the condition that the top dressing must use a high content of nitrate nitrogen (55---62 nutrients) three-element compound fertilizer (preferably added chelated trace elements) according to the different growth stages and growth of crops, the use of different nutrient ratios, in the case of reducing the total amount of use, with the use of humic acid, fulvic acid fertilizer, rooting and rooting. At the same time, it is necessary to strengthen foliar top dressing and supplement trace elements to ensure high and stable crop yield.

Planting vegetables, including greenhouse protected land, open field production, fertilizer application includes bottom fertilizer, top dressing, and top dressing is divided into root top dressing and foliar top dressing.

The base fertilizer is mainly organic fertilizer, which should account for 60% of the total fertilizer requirement in the life of the crop. Generally, the production of protected areas is better for chicken manure and pig manure with higher nutrient content, but it is necessary to pay attention to the full decay and reputation of ripening, and the process of decay will produce a higher temperature, which will kill the eggs and germs in the fertilizer. More importantly, high temperature decomposition will gradually convert the ammonium nitrogen in the fertilizer into nitrite acid to nitric acid, and this process is completed outside the shed, which can avoid the accumulation of damage to crops in the closed environment of the shed after being used in the ground.

A large amount of organic fertilizer as a base fertilizer provides a hotbed for the reproduction of microorganisms, effectively improves the ground temperature in the shed, and the activity of microorganisms produces a large amount of carbon dioxide, which effectively promotes the photosynthesis of crops, which is also the necessary basis for the high yield of vegetables in the shed.

Vegetables and crops in the field, the preparation of fertilizer must be dominated by organic fertilizer, especially in the newly opened vegetable garden, how to ensure the quality of product vegetable production and production, purely relying on organic chemical nitrogen fertilizer to carry out fast-acting vegetables, this kind of fertilizer method is extremely not green and unhealthy, in the planting of vegetables should be based on the characteristics of the growth and development of vegetable types, clear how much organic fertilizer and organic fertilizer are applied. To be suitable for normal planting in the normal climate of the effective application amount, but also need to fully consider the vegetable growth season is not the same, generally early spring stubble in the high and low temperature test season, early growth retardation, must be moderately increased, autumn stubble planting vegetables in the continuous high temperature and ultra-low temperature season, <>

The early growth is fast, it must be moderately manipulated to grow, sometimes from the total fertilizer yield of the enshrinement, is not the demand for the growth period of the enshrined vegetables, but if it does not reach a certain period of growth requires nutrient compressive strength. When some growers apply base fertilizer, the preparation of base fertilizer is insufficient, and the type of chemical fertilizer is single. And that often leads to insufficient nutrients in greenhouse vegetables, and the growth rate of crops will be very slow.

Therefore, the type of base fertilizer should be complete, and a variety of diversified fertilizers should be reasonably matched and applied, and the effects complement each other. Many farmers think that it is very easy to look strong when using more nitrogen fertilizer, but if there is too much nitrogen fertilizer, vegetables are very easy to grow, and in the end, they only bloom and do not bear fruit, or it is very easy to fall flowers and fruits, and will continue to inhibit the absorption of potassium and calcium.

Growers must apply nitrogen fertilizer moderately and appropriately, so as to achieve the application of other trace elements. Partial application of chemical fertilizers reduces the use of nutrients. When there is an excess of a certain type of nutrient, an inhibition effect occurs, so that crops mainly show nutrient deficiency.

For example, excess nitrogen causes a lack of calcium, resulting in heartburn in the cabbage dry stomach; The high salt concentration value in the soil inhibited the calcium absorption of strawberry seedlings, resulting in a physiological lack of calcium. Potassium excess, which reduces the effectiveness of calcium, magnesium and boron fertilizers; Excess phosphorus reduces the effectiveness of calcium, zinc, and boron fertilizers. Long-term application of available chlorine organic fertilizer. Chlorine can reduce the starch content in vegetables, resulting in the quality of vegetables being affected, the production volume is reduced, and the residue in the soil causes soil acidification, which is easy to produce decalcification of the soil layer, resulting in clumping and clearing.

In addition, the unreasonable fertilization method is also very easy to damage the plant, such as the compound fertilizer with a higher concentration is close to the rhizome when fertilizing, causing the edge of the vegetable leaves to be scalded like water, and it will wither after a few days. Vigorously promote microbial organic chemical compound fertilizer biological organic fertilizer with microbial strains of active bacteria, which is composed of organic fertilizer, inorganic fertilizer, bacterial fertilizer, synergist composite type of "four-in-one" fertilizer, to achieve a variety of chemical fertilizer reasonable recipes, mutual benefit and win-win, economic benefits to promote, is one of the best fertilizers to complete the greenhouse vegetable balance fertilizer. Vegetables are water-loving crops, and fertilizing in the soil layer when it is drought, not only can not make full use of fertility, but also will make the soil solution concentration rise sharply, and it is very easy to burn vegetables to the roots.

Therefore, vegetable fertilizer should be closely combined with water injection, ditching and fertilizing, burying the fertilizer strictly and then filling it with water, or fertilizing along the stream.

It is necessary to determine the specific growth of the plant according to the specific growth of the plant, and it is necessary to pay attention to the needs of the plant, so that it can be better carried out to observe the growth of the plant, and when fertilizing, we must pay attention to the specific situation around the burning intention, and do not burn the seedlings to death.

When applying rental fertilizer to greenhouse vegetables, organic fertilizer must be the dominant one. One of the misconceptions that often occurs in the meridian period is that everyone thinks that chemically synthesized waste is more productive, so a large number of chemical waste is used, resulting in a decrease in production instead of increasing.

Fertilization should be carried out reasonably according to the growth of plants, not all fertilizers can be used, and fertilization should not be too much.

The effect of the new direction of synergistic nitrogen fertilizer is very good, and it is currently the only nitrogen fertilizer brand in the country that has obtained the registration certificate of the Ministry of Agriculture.

Choose the most suitable fertilizer for you according to your growing crops, soil conditions, and your target production value.