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Tag Archive : Humic acid and soil climate change

Humic acid and soil

Humic acid and soil

Soil is the largest carbon pool on the earth, in which humic acid carbon accounts for 80% of soil organic carbon, and its carbon storage and release directly affects the biosphere carbon cycle.

What is humic acid?


Humic Acid (HA) is widely found in soil, lakes, rivers, oceans, lignite, weathered coal, and peat. It is an animal and plant remains (mainly plant remains) under the action of microorganisms and geophysical and chemical processes. A class of macromolecular organic weak acid polymers formed by a series of decompositions and transformations.

Human understanding of humic acid began with questions about the “black things” in the soil more than 200 years ago. After a long and complicated exploration process, soil scientists and chemists talked about “black things” → “dark substances” → “ The evolution of humus”→“humic acid” formed a consensus. In 1807, Thomson of Germany first extracted humic acid from the soil with lye.

What is soil climate change?

Soil climate change refers to the relationship between soil carbon storage and discharge. The soil is the largest carbon pool on the earth, with soil organic carbon of about 3 trillion tons and humic acid carbon of about 2.4 trillion tons, accounting for 84.5% and 67.6% of the biosphere carbon, respectively.

Before the World Industrial Revolution, the humic acid carbon decomposed by the humic acid, which was accumulated every year, kept the relationship between the storage and release of the soil carbon pool, the carbon storage of the biosphere was basically unchanged, and the CO2 concentration in the atmosphere was not Too much fluctuation.

As is known to all, after the world entered the industrial revolution, humans put a large amount of fertilizer into the soil, breaking the balance between the storage and release of soil carbon pools.

Furthermore, it is observed that the main cause of changes in soil carbon pools is agricultural release, which environmentalists call an attack on the soil. In the past 40 years, chemical fertilizers have been placed in the first place in the soil, which directly affects the changes of soil organic carbon pools. Soil climate change has become an indisputable fact because of the large fluctuations in soil organic carbon pools.

First, agriculture is a basic industry with sustained investment and large output. This position is difficult to change. At the same time, China uses 7% of the world’s cultivated land to support 22% of the world’s population. It has formed a vicious circle of long-term large-scale investment, high multi-population index and difficulty in fallow. This situation needs to be resolved.

Second, the soil organic carbon content is low. According to the National Agricultural Technology Center, the Soil Basic Nutrient Data Set (2005-2014) compiled by Soil Testing and Formulation shows that the soil organic matter content in China is between 17.24-28.71g/kg, compared with 40 years ago, the soil organic carbon content. Significant decline, soil carbon stability and carbon control function is also weakened or even lost. Third, soil carbon sequestration is difficult. China’s 1-meter-deep soil organic carbon pool totals about 90 billion tons of carbon equivalent, and needs to increase carbon by 2.9% to offset energy emissions (total energy emissions in 2013 was as high as 2.612 billion tons of carbon equivalent), which requires soil carbonization speed far exceeds Current state of the art.

humic acid and humic acid fertilizers solve the problem of soil climate change


The soil organic carbon content in China has decreased significantly, mainly due to the serious deficiency of humic acid carbon accumulation. Let humic acid come to the soil from the soil. Using industrially prepared humic acid and humic acid fertilizer to feed the soil, it can stabilize and increase soil organic carbon content and regulate soil climate change.

First, humic acid is an important member of the Earth’s carbon cycle. Nowadays, environmental factors such as soil, water, air, animals and plants, and beneficial microorganisms that humans depend on are inevitably involved in humic acids. Therefore, it is common to use humic acid and humic acid fertilizer to solve soil climate change problems.

Second, humic acid is the core of the soil’s organic carbon, accounting for up to 80% (2.4/3, trillion tons). Research and practice have proved that the structure, function and properties of industrial extraction of coal humic acid and soil humic acid are basically the same. Therefore, it is feasible to use humic acid and humic acid fertilizer to increase soil organic carbon content.

Third, humic acid is the “best companion” for improving quality and enhancing fertilizer. Humic acid can be combined with large, medium, micro and beneficial elements to achieve the best match. In the case of equal nutrients, humic acid fertilizers increased by an average of 10 percentage points or more, which is equivalent to a net increase of 30% to 40%. 60 years of production and application practices have proven that humic acid fertilizers have folloing function
1 stabilize carbon and carbon fixation;
2 and the ecological environment of the soil;
3 to promote crop yield increase;
4 reduce emissions;
5 easy to operate;
6 quick results;
7 sustainable and so on, so the use of humic acid, humic acid fertilizer to feed the soil, has direct, rapid, effective and safe scientific.