How much organic fertilizer should be applied to increase soil organic matter by 1%

Both soil science and plant nutrition have confirmed that the index to measure the level of soil fertility is the amount of organic matter in the soil.

The most direct and rapid way to increase organic matter is to apply organic fertilizer.

What is the standard for measuring soil fertility?

Most growers and agricultural practitioners may think that the soil is fertile if the nutrient content of nitrogen, phosphorus and potassium in the field is high.

Is it really the truth?

Southern red soil, yellow soil and other soils sometimes have higher nitrogen, phosphorus and potassium than black soil in Northeast China, but their fertility level is not as high as that of black soil, and the yield and quality of crops produced are not as good as black soil.

The fat field will not lose weight for three years, and the lean field will not get fat for three years. If a lot of nitrogen, phosphorus and potassium represents soil fertility, how can there be a thin field without fertilizer for three years if so many chemical fertilizers are applied every year?

In fact, both soil science and plant nutrition have confirmed that the index to measure the level of soil fertility is the amount of organic matter in the soil.

Soil organic matter generally refers to the carbon-containing organic compounds that exist in various forms in the soil. It refers to the substances in the soil that are derived from life. One of the important indicators to measure soil fertility

How much organic fertilizer should be applied to increase soil organic matter by 1%?

In fact, the most primitive source of soil organic matter is photosynthesis, and other links are the transformation of form and consumption, which is absolutely impossible to increase. Therefore, no matter how hype is said, organic matter will not be created out of thin air. the

Whether it is grass growing or fallen leaves in nature, its contribution to soil organic matter will not exceed 0.1% per year, and the actual added value will be even smaller if the consumption of soil microorganisms and plant utilization are included. Considering that the current pattern of generally increasing chemical fertilizers is plundering organic matter, organic matter is actually decreasing year by year.

Therefore, the most direct and rapid way to increase organic matter is to apply organic fertilizer.

How to increase the organic matter of the soil by 1% by applying organic fertilizer?

Assuming the plow layer thickness is 0.2 meters and the soil bulk density is 1.3, then the weight of one mu (667 square meters) of plow layer is 667x0.2x1.3=173.42 tons. The Ministry of Agriculture’s standard for organic matter in organic fertilizers is ≥45%. Calculated at 50%, the amount of fertilizer needed to increase the organic matter by an average of 1% per mu of soil is 173.42x1%÷50%=3.47 tons.

It can be seen from this that increasing soil organic matter cannot be fooled in the slightest, and there is no possibility that the so-called high-tech application of a few hundred catties can increase soil organic matter by 1%!