Researchers have pointed out the causes of thin, barren land and fertility failure, such as unbalanced fertilizer use and lack of organic matter, but from the perspective of plant nutrition and soil health, this theory is not comprehensive, and even the root cause has not been found!
To find out the "cause" of unhealthy soil, we must first understand the standard of soil health-Mr. Zhang Chaohui, director of the American Soil Health Society, pointed out: "In addition to about 45% minerals, that is, the soil itself, healthy soil needs about 25% air, about 25% water, about 5% organic matter and about 1% microorganisms."
Accordingly, we can compare and analyze the soil, fertilizer, water, gas, or fertilizer, organic matter and microorganism one by one, and fully understand where the land is "thin" and where the soil is "sick" in the process of comparative analysis. Because only by finding out the real cause can we prescribe the right medicine and get rid of the disease!
First of all, there is no doubt that the hardened, acidified, salinized, impermeable, nutrient-deficient, and fertility-depleted soil "fed thin" by chemical fertilizers is caused by the long-term accumulation and residue of chemical fertilizer components in the soil, which cannot be effectively decomposed and transformed. Then, what is the basis for the transformation, decomposition and absorption of chemical fertilizers and soil nutrients? There is no doubt that it is a "microorganism"!
Secondly, the soil hardened, acidified, salinized, impervious, water and fertilizer-retaining, nutrient-deficient and fertility-depleted by chemical fertilizers depends on the improvement of its water and fertilizer-retaining, permeability and fertility. Obviously, it depends on the aggregate structure, organic matter, humic acid and humus in the soil, but what do aggregate structure, organic matter, humic acid and humus produce? There is no doubt that it depends on "microorganisms"!
Thirdly, in what physical and chemical reactions can all kinds of pollution in the soil, such as pesticide residues, fertilizer components residues and various heavy metals, be digested, degraded or harmlessly transformed? How can we ensure that agricultural products are not polluted and improve their quality? Needless to say, it is still necessary to rely on the "microorganisms" in the soil, and rely on microorganisms to decompose, transform, solidify, transfer and synthesize the above pollutants in the process of their reproduction and metabolism, so as to achieve the goal of completely degrading and restoring soil health!
How to understand it? From the perspective of analogy and easy to understand, we all know that "dead-faced steamed bread" is not easy to digest and has poor nutrition, so we should eat convex steamed bread. The elements of soil, nitrogen, phosphorus and potassium fertilizer are the flour for our steamed bread. Without yeast, flour itself can't make steamed bread! For another example, there is a big table in front of us. If there are no digestive enzymes and catabolic enzymes in our stomach, we can't digest big fish and meat, sea cucumber and abalone, and we can't convert them into effective nutrition and be absorbed by the human body. Our physique will not be strong because of this, but will be weak, and our resistance to diseases will drop, and it is natural to die young!
Indeed, in a strict sense, microbial bacteria are not crop soil fertilizers, but in a functional sense, microbial bacteria are "good cooks", "nutritionists" and "cleaners" of soil!
In recent years, a large number of cases of fruit tree death and crop failure have occurred in various places, and the root cause still lies in the "disease" of the soil-Professor Yang Jie of the National Apple Engineering and Technology Research Center once pointed out sharply: "The reason why crops grow badly is that the crop roots are not good, the crop roots are not good because the soil is not good, and the soil is not good because there are a lot of beneficial microorganisms in the soil!" It can be said that it is shocking and right!
Why is the utilization rate of chemical fertilizer so low? On the one hand, because of the excessive use of chemical fertilizers, on the other hand, the ability of soil to hold chemical fertilizers is limited, which is gradually decreasing in recent years. This capacity is determined by the physical structure of the soil, and the size of this "container" depends on the types and quantities of soil organic matter and soil organisms. Fertilizer applied to soil is temporarily stored in soil particles and humus, and then gradually dissolved in water in soil aggregate structure and soil capillaries, which can be absorbed by plant root hairs with water.
After people give up using organic fertilizers such as compost, the content of soil organic matter decreases, which leads to a sharp decrease in the number of soil animals and microorganisms that feed on it, a decrease in soil aggregate structure, and low soil aeration porosity and water-holding porosity, that is, the soil physical structure is poor, which makes it impossible to maintain the fertilizer, and it is washed away by the rain, or it is just left in the soil as it is, which cannot be absorbed (in layman's terms, "undigested"), and it is useless to add fertilizer.
In a large number of field surveys in rural areas, we found that the original 100 kg of chemical fertilizer has now used 200 kg or even 300 kg, which not only failed to increase production but also reduced production, proving that what our soil lacks is not "fertility", but "fertility"! The root cause of insufficient soil fertility lies in the lack of organic matter and microorganisms and bacteria in the soil!
In practice, after using high-quality soil conditioners, organic fertilizers and microbial fertilizers in various places. Great success has been achieved in improving hardened, acidified, salinized, seriously diseased, over-polluted and fertility-depleted soil, improving soil organic matter, restoring soil health, restoring soil fertility, and promoting crop yield and quality improvement, with less investment, quick effect and lasting ecological effect.