Ask the teacher, is nitrate nitrogen more serious than ammonia nitrogen for soil compaction yellowin

No matter what kind of nitrogen fertilizer is applied to the soil, our crops mainly absorb ammonium nitrogen and nitrate nitrogen in the form of nitrogen fertilizer, and some of our common compound fertilizers are directly in the form of ammonium nitrogen and nitrate nitrogen. Our common urea is decomposed in the soil, and the nitrogen fertilizer in the form of ammonium nitrogen is absorbed and utilized by crops.

What is the difference between the two forms of nitrogen fertilizer, the information in hand is mainly the following: 1. Nitrate nitrogen is fast, ammonium nitrogen is slow: many friends who have listened to agricultural technology knowledge training should know that nitrate nitrogen is often compared to an airplane, which has a fast effect.

We often compare ammonium nitrogen to a ship, which is slower to work. 2. Different crops have different requirements for nitrogen sources: the nitrogen source absorbed by aquatic crops cultivated in flooded environments is mainly reduced ammonium nitrogen, and the oxidized nitrate nitrogen is mostly used for dry crops grown in dry land.

3. Nitrate nitrogen and ammonium nitrogen move and store in the soil in different ways: smaller soil particles are generally negative, can absorb ammonium nitrogen, so ammonium nitrogen after application in the soil movement range is small, the single use of ammonium nitrogen for consecutive years is easy to make nitrogen fertilizer concentrated in the upper soil accumulation, which is also one of the reasons for the serious salinization of the upper soil and the poor development of the root system of the lower soil. Because nitrate nitrogen is electronegative, soil particles are difficult to adsorb, and it has a large range of movement in the soil, and is relatively evenly distributed in different soil layers, which is conducive to the absorption of the deep roots of crops, but it is also easy to be lost.

4. Different crop absorption and utilization: the nitrate nitrogen inhaled into the body of crops can be reduced to ammonium nitrogen, and nitrate nitrogen can also be directly stored by crop leaves and other organs, while ammonium nitrogen is inhaled by crops and cannot be stored in the crop body. 5. Effect of nitrate nitrogen and ammonium nitrogen on the absorption of medium and trace elements

Ammonium nitrogen exists in the form of a positive charge, nitrate nitrogen exists in the form of a negative charge, and medium and trace element ions generally exist in the form of a positive charge. Ammonium nitrogen will inhibit the absorption of medium and trace elements, and nitrate nitrogen can promote the absorption of medium and trace elements. 6. Different effects on soil pH

Long-term use of ammonium sulfate and other ammonium nitrogen-based physiological acid fertilizers, especially in southern soils, will seriously cause soil acidification. Appropriate application of physiological alkaline nitrogen fertilizers such as calcium nitrate in the southern soil can also play a role in improving the soil. Because nitrogen is one of the main influencing elements in the early stage of grape growth, the reason why I didn't tell you how to fertilize grapes during the young fruit period is to use two days to make everyone better understand the importance of choosing fertilizer, not necessarily high content or cheap is affordable.

You need to choose the most suitable product for your grape growth conditions.

Nitrate nitrogen can only be absorbed and utilized after it is reduced to ammonium nitrogen in the body.

There is no question of whether it is good or bad. N plants inside can be used eventually. On the contrary, the soil is acidic when ammonium nitrogen fertilizer is applied for a long time, and alkaline soil is alkaline when nitrate nitrogen fertilizer is applied for a long time. Therefore, nitrate nitrogen fertilizer should be applied to acidic soils, and ammonium nitrogen fertilizers should be applied to alkaline soils.

Nitrate nitrogen: generally it is a fertilizer with nitrate ions, and now it is generally said that it is nitrate sulfur group, which is slightly more expensive, and the fertilizer effect is rapid, but the volatility is very strong, and the fertilizer effect is not durable.

Personally, I don't think there is much difference, but obviously ammonia nitrogen fertilizers generally have a large nitrogen content, which can also be calculated from the molecular formula, and nitrate nitrogen may be regarded as acid nitrogen fertilizer, ammonia nitrogen is alkaline, so it should be used in different soils

Ammonia nitrogen and nitrate nitrogen are the two most common forms of nitrogen, ammonia nitrogen refers to ammonia, ammonium carbonate, ammonium chloride and other substances, nitrate nitrogen refers to nitrogen in potassium nitrate, and ammonium nitrate has both forms of nitrogen. Nitrogen also includes amide nitrogen (such as urea), lime nitrogen and cyanamide nitrogen.

Let's talk about amide nitrogen first: fertilizer is not easy to volatile, and the fertilizer effect is relatively long-lasting. Early N fertilizers are all amide or amine.

It is used more in some greenhouse areas (because it does not volatile, so it will not cause the phenomenon of fumigation shed) Nitrate nitrogen: generally a fertilizer with nitrate ions, now it is generally said that nitrate sulfur group, ** slightly more expensive, fertilizer effect is rapid, but the volatility is very strong, and the fertilizer effect is not durable.

At present, the main problems of the rural environment are, the residue and excessive use of chemical products, due to the serious pollution of the air by straw burning, the air pollution index in the countryside is also very high, and the farming in the countryside has also brought a series of problems.

1. The irrational use of chemical fertilizers and pesticides.

Since the reform and opening up, China's agriculture has developed rapidly, but this development mainly relies on the substantial increase in chemical inputs such as fertilizers and pesticides, resulting in the reduction of soil organic matter and fertility. The irrational use of chemical fertilizers will also cause pollution to the atmosphere, and the shallow application and sprinkling of nitrogen fertilizers often cause the escape of ammonia, and the nitrate nitrogen will carry out denitrification in the case of poor ventilation, and the gaseous nitrogen will escape into the atmosphere, causing pollution to the atmosphere.

Pesticides in agricultural production because of their quick effect, high control effect, and wide range of control, ensure the high yield and increase of crops, reduce species diversity, and make the already fragile agricultural ecosystem in rural areas more fragile. When pesticides are used, some natural enemies of agricultural pests, such as frogs, ladybugs, red-eyed bees, and even some insectivorous birds, also die in large numbers due to the relationship of the food chain or direct poisoning, destroying the ecological balance.

2. The transfer of urban pollution to rural areas accelerates rural environmental pollution.

With the adjustment of the industrial structure in cities, some enterprises with high energy consumption, heavy pollution, and difficult to govern have moved to rural areas, bringing serious pollution to the rural environment. Due to the poor conditions of the factory and the imperfect equipment, on the one hand, the use of irrigation will affect the growth of crops; On the other hand, the aquatic plants and aquatic animals in the river have been wiped out. In addition, there are a lot of urban garbage in the suburbs and rural landfills or piles, urban garbage and industrial solid waste not only occupy valuable land resources, but also pollute the surrounding water, soil and atmosphere, greatly affect the health of nearby residents, and destroy the rural ecological environment.

3. Straw burning is seriously polluting.

Summer and autumn are the most serious periods of air pollution in rural areas. Every year, a large amount of straw in rural areas is not utilized. With the improvement of the degree of agricultural mechanization, the vast majority of rural areas use harvesters to harvest wheat, although it saves time and effort, but the wheat stubble left behind is quite high, if not treated, it will inevitably affect the growth of autumn crops, and the concentration of nutrient carbon increases sharply, causing serious air pollution.

In the evening, the humidity of the air increases and the smoke spreads slowly, all accumulating in the lower levels, and visibility is greatly reduced. In severe cases, it can also lead to respiratory diseases, which greatly affects people's physical and mental health.

4. Environmental problems brought about by rural poultry breeding and related industries.

According to the survey data, the wastewater produced by raising a cow exceeds the wastewater generated by 22 people's lives, and the sewage produced by raising a pig is equivalent to the wastewater generated by 7 people's lives. The nitrates and benches in the groundwater in the nearby areas are put on the streets to dry, and the bristles of animals such as pig hairs are spread all over the streets, the smell is unpleasant, and a large number of mosquitoes and flies gather. Since most of these workshops are located in residential areas, they seriously affect the quality of life of the surrounding residents, damage people's physical and mental health, and deteriorate the environmental health situation in rural areas.

What kind of fertilizer is the best water-soluble fertilizer formula at present?

Denitrification requires a carbon source that is easily degradable, and refractory organic matter cannot provide the carbon source required by denitrifying bacteria, so it must be BOD

Chicken manure can be planted, both can be used, and the effect is the same.

First of all, chicken manure contains a large amount of organic matter, which can make the soil fertile, eliminate soil compaction and reduce salt damage after deep ploughing. Moreover, the amount of nitrogen contained in chicken manure is high, and if it is exposed to the outside for a long time, it will cause the loss of nitrogen fertilizer, thereby reducing the fertilizer efficiency.

Secondly, the chicken manure exposed on the surface is easy to produce harmful gases, which has a great impact on the root system and leaves of the seedling plants after planting. Now the chicken manure sold on the market is dried chicken manure, but after drying, the smell is small, and this kind of chicken manure also needs to be further decomposed before it can be used safely. There are two main ways to rot:

First, after watering, the film is pressed and rotted. Because the soil itself contains a large number of microorganisms, when dry chicken manure is applied to the soil, these microorganisms will slowly decompose it. During the summer stubble period, the greenhouse has a long idle time, and after the harvest of the vegetables in the previous stubble, the seedlings can be quickly pulled and cleared, and the dry chicken manure will be evenly sprinkled on the ground, turned into the soil layer, and covered with film after watering to promote the rotting of chicken manure.

However, this method of decomposition takes a long time, and when the ground temperature exceeds 20, it is generally more than a month before the dry chicken manure can be completely decomposed. When the ground temperature is low, the rotting time has to be extended. Therefore, the method takes a long time, is suitable for overwintering a large crop, and is not in a hurry to use it at the moment of planting.

The second is the application of manure decaying agent. At present, there are some products on the market that specialize in decomposing manure. After the crops are cleared, the dry chicken manure is sprinkled in the shed, according to the amount of a bottle of high fertility per 1000 kg of dry chicken manure, the high fertility is mixed with water, evenly sprayed on the dry chicken manure, and after ploughing into the soil, watering and mulching are carried out to rot.

This method of decomposing takes a short time, when the ground temperature is higher than 20, the chicken manure can be completely decomposed in more than ten days, which is suitable for the situation that the idle time is short and the planting is urgent.

Of course, manure decomposition should be carried out under certain conditions. Special attention should be paid to dry chicken manure when it is ripe: it should be watered immediately after being applied to the soil, so that the relative moisture content of the soil is about 80%, so as to create favorable conditions for the rapid reproduction of microorganisms, so that the decomposition effect is better.

Dried chicken manure is used after decomposition and fermentation, and the ammonia produced in the fermentation process will be converted into nitrate nitrogen by nitrifying bacteria in the soil, which can not only be absorbed and utilized by crops to avoid waste, but also avoid fertilizer and gas damage such as vegetable roots and smoked seedlings caused by the process of rotting and fermentation, killing two birds with one stone.

Almost, preferably vermicompost.