What happens to the green color of the ground after watering the soil in the greenhouse?

After watering the soil of the greenhouse, the color of the B side turns green. That's fattening. In this way, the plants in the greenhouse grow very well. It's very energetic.

If the greenhouse soil turns red, it should be reasonably improved. Reasonable crop rotation: For our conditional planting, we should pay attention to reasonable crop rotation when planting, which can effectively alleviate the nutrient imbalance caused by heavy cropping.

In addition, for plots with a relatively long stubble period, our growers can plant crops with strong fertilizer absorption capacity Heavy stubble soil should be increased with organic fertilizer and trace elements. Treat bacteria with bacteria and supplement trace elements. Adjust acid and supplement calcium, sprinkle quicklime, plant ash, etc.

<> deep ploughing and ploughing of the land: greenhouse vegetable planting due to long-term high temperature and humidity environment, coupled with excessive application of chemical fertilizers and watering, so that the gap between the soil is reduced, the soil oxygen content is insufficient, the air permeability is poor, and the content of soil-borne viruses and pest eggs is high As for why it causes the phenomenon of soil red, white and green, through so many years of investigation and analysis, I think there are three main reasons, the first is that the soil in the greenhouse is not affected by rainfall, and the salt in the soil cannot be lost with rainwater or leached into the deep soil layer.

Fertilization should be applied in proportion to different plants, remember that nitrogen fertilizer is too high, and must be fermented when applying farmhouse fertilizer, because high temperature can evaporate 80% of the salt, and prevent ammonia from burning seedlings. It is caused by factors such as long-term over-exploitation of soil, long-term cultivation, and unfavorable soil protection. In more detail, it is caused by the excessive loss of some elements in the soil caused by the long-term application of chemical fertilizers, pesticides and fungicides and the long-term planting of the same type of crops, as well as the serious lack of soil organic matter.

Greenhouse crops absorb and remove a large number of neutral and alkaline nutrients from the soil when forming yields, which makes the soil develop towards acidification due to the lack of timely replenishment. According to our investigation and analysis of crop soil, greenhouse crops are generally over-fertilized, the fertilization process is relatively fixed, basically nitrogen, phosphorus and potassium, resulting in the imbalance of soil nutrients, at the same time, nitrogen, phosphorus and potassium more, antagonistic other trace elements, crops are prone to deficiency symptoms, and eventually the growth is hindered, yield and quality decline.

Recently, a friend said that the greenhouse soil has turned red, what is the reason for this? Why does the greenhouse soil turn red, and what are the prevention and control measures for the greenhouse soil turning red? Today, agricultural materials will interpret the above problems in detail for you.

The greenhouse soil turns red, which is manifested in the fact that the soil grows similar to moss after watering, and after the soil surface dries, there are crystals mixed with red matter on the soil surface. There are three major factors for greenhouse soil to turn red: 1. Soil acidification

In some places, the initial soil is alkaline soil, and the long-term application of chemical fertilizer makes the soil pH between, resulting in soil acidification, and the iron, manganese, zinc plasma in the soil dissolves and collects the soil surface, and the iron and manganese plasma are oxidized after the soil dries to form red patches. This soil is acidic. 2. Soil salinization

The process by which the salt content of the bottom layer of the soil or groundwater rises to the surface with the capillary water, and after the water evaporates, the salt accumulates in the surface soil. The soil is generally alkaline, pH in soil eutrophication: soil salt separators collect on the surface of the soil, so that the soil surface nutrients are too high, suitable for some algae to survive, when the soil surface is dry, the algae die, and the algae residues show red.

At the same time, the author believes that such a present.

The water is not clean, there are algae plants, or there is moss.

Soil acid-alkali damage disorder performance: when the soil appears green, red and white frost is the most intuitive reflection of soil barrier on the ground color, and these three situations are the accumulation of phosphorus, potassium and trace elements in the soil. 1.

In the early stage of soil salinity, the soil surface appears pan "hoarfrost", which means that a layer of hoarfrost has accumulated on the surface. 2.When further salinization is aggravated, the soil becomes "green", that is, the soil appears copper-green markings, and the surface layer turns green, which means that your soil has been moderately salinized, and green is long-green moss, which is an algae; 3.When the soil salinity is serious, the surface of the soil appears "Purple Chlorella" brown "red soil" performance, Purple Chlorella is an indication of saline, its appearance indicates that the salt content in the soil is already very high, and the salt content has reached the critical line of soil safety.

The main reason for the vigorous growth of soil salinity exceeds the standard high temperature and high humidity is the serious surplus of chemical fertilizers, or the reduction of soil organic matter to deteriorate soil properties and reduce fertilizer retention capacity. It is best to use EM technology to improve saline-alkali soil, using straw, livestock and poultry manure and other wastes as raw materials to make EM compost. With the help of microorganisms to improve fertilizer efficiency, reduce the use of chemical fertilizers, reduce land and environmental pollution, on the basis of increasing crop yield, at the same time improve the quality of products, and then implement pollution-free production.

Fermentation straw composting method with EM bacteria:

The total amount of organic raw materials such as rice bran, wheat bran, straw meal, dry livestock and poultry manure (crushed) is 500-1000: EM strain 1: brown sugar 1, add an appropriate amount of well water; First dissolve the brown sugar with hot water, pour it into the water, then add EM strains and mix well, then mix well with raw materials, stack compacting and cover tightly sealed or sealed in the pit for anaerobic fermentation, two weeks later, there is a koji aroma or white mycelium that the fermentation is successful.

The surface of the soil in the greenhouse becomes red, mainly because the greenhouse vegetables are fertilized too much, and the fertilizer residues accumulate, resulting in soil salinization, so that sulfide, sulfate, organic salt, and inorganic salts remain in the cultivated soil, resulting in the soil compaction and salinization of the greenhouse. As a result, a purplish-red substance appears on the surface of the soil.

Cause: When the greenhouse is indoors, the amount of fertilizer greatly exceeds the absorption of vegetables, and some can not be absorbed by plants"By-products"residue and accumulation in the soil. Due to the high temperature in the shed and the large amount of evaporation, the salt is left on the soil surface of the shed when the water evaporates.

In addition, the greenhouse is usually in a closed state, and the salt can not be washed and leached by rainwater, so it is constantly left in the soil cultivated layer, resulting in the salinization of the vegetable greenhouse soil, and when the soil is dry, a layer of white matter will be generated on the soil surface, which is the fundamental reason for the salinization of the greenhouse soil.

Harm: Salinization can cause physiological drought and metabolic disorders caused by difficult water absorption of vegetables, which is manifested as slow seedling emergence after seed sowing, low seedling emergence rate, and gradual death of seedlings; The plant is short and the growth is stagnant, the root growth is inhibited, the root tip and the new root are brown, the whole root system is black and rotten when it is serious, and loses its vitality, the leaves are curled and lack of green, the leaf tip is yellow and curled, and the stem and leaves die when the damage is serious.

Improvement measures: 1) Carry out grain and vegetable rotation, and where conditions permit, greenhouse vegetables and rice rotation can be carried out; In summer, especially in the rainy season, the roof membrane of the greenhouse is removed, and the natural rainwater is used to wash the salt.

2) Carry out balanced formula fertilization to avoid excessive fertilization; Increase the application of organic fertilizer, chicken manure and pig manure, return straw to the field, and reduce the application of chemical fertilizer; Minimize the use of organic fertilizers with high salt content and chlorine-containing fertilizers.

3) remove 2 3 cm of soil on the surface layer of greenhouse soil, replace it with fertile soil, and change the soil to remove salt; Improving the soil structure and activating the soil is not only conducive to the extension of the lateral roots of vegetables in greenhouses, but also enhances the ability of vegetable roots to absorb nutrients and water, and can also improve the organic matter content of greenhouse soil.

1. If only the surface is green, it is very likely that moss will grow under high temperature and high humidity conditions, and wetlands are very common in summer, so don't worry.

2. If it is also green below the surface, it is speculated that the greenhouse soil is heavily acidified, and the frequent use of iron-containing micro-fertilizer leads to iron enrichment, and the iron is reduced to bivalent and dark green under the conditions of soil watering and compaction. In this case, it is necessary to appropriately use lime, alkaline soil conditioner, and decomposed organic fertilizer to adjust the physical and chemical properties of the soil.

This is caused by soil compaction and salinization. The use of a large number of chemical fertilizers has made the salinization of the soil more serious, and the soil salt damage is divided into light and heavy, and the ground has clear frost at the beginning and then develops to green skin and moss, and the vegetables in the shed are still normal; In the moderate case, there are many lumps of red gelatinous matter on the ground, which turn into "red frost" after drying, and the vegetables in the shed will wilt in the middle of the growth.

Solution: The best measure to solve soil compaction and salinization is to use Qiba loose soil essence, 1 kg per mu, and sprinkle the loose soil essence with 20 kg of fine sand near the roots of vegetables when used, and then water. Sheds under 4 years old can be used once per growing season; Sheds over 4 years old need to be used twice per growing season.

After the use of loose soil essence, through the physical action of loose soil essence, improve the aggregate structure of the soil, make the soil loose and breathable, and promote the root system of vegetables to take root, so as to ensure the absorption of nutrients and water by vegetables, and achieve the purpose of "deep roots and lush leaves".

Summary. 1. The reason why the soil rusts and turns red.

1.Soil acidification leads to the redness of the soil surface: greenhouse planting, before the vegetable farmers were not aware enough, a large number of physiological acid fertilizers were applied to the soil, such as potassium chloride, potassium sulfate, ammonium chloride, ammonia sulfate, etc., coupled with the high temperature and humidity in the shed, very little leaching by rain, with the increase of cultivation years, the accumulation of acid ions in the cultivated soil is becoming more and more serious, resulting in soil acidification, iron, manganese, zinc plasma in the soil dissolves and collects the soil surface, and the iron and manganese plasma are oxidized to generate red patches after the soil dries.

What is the reason for the reddish soil surface in the greenhouse and how to improve it?

1. Reasons for soil rust and redness 1Soil acidification leads to the redness of the soil surface: greenhouse planting, before the vegetable farmers were not aware enough, a large number of physiological acid fertilizers were applied to the soil, such as potassium chloride, potassium sulfate, ammonium chloride, ammonia sulfate, etc., coupled with the high temperature and humidity in the shed, very little leaching by rain, with the increase of cultivation years, the accumulation of acid ions in the cultivated soil is becoming more and more serious, resulting in soil acidification, iron, manganese, zinc plasma in the soil dissolves and collects the soil surface, and the iron and manganese plasma are oxidized to generate red patches after the soil dries.

2.Soil salinization leads to red soil surface: greenhouse planting, due to the continuous use of unrotted farm fertilizer and the abuse of chemical fertilizers for many years, resulting in serious soil compaction, crops can not be completely absorbed, and finally remain in the soil, in fact, chemical fertilizers are inorganic salts, which causes the salt content of greenhouse soil to rise, after the water evaporates, the salt remains on the surface of the soil, and gradually appears red after oxidation.

If your problem has been solved, you can click "End Service" in the upper right corner and give a 5-star thumbs up. Click on the avatar to follow me, if you have any other questions, you can consult me again