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By Mona | 22 November 2022 | 0 Comments

The key reason why organic fertilizers are replacing chemical fertilizers!

The key reason why organic fertilizers are replacing chemical fertilizers!

Authoritative research has found that organic fertilisers can replace 100 per cent of chemical fertilisers and maintain high yields when the soil organic matter content reaches 30 grams per kilogram. So it is possible to achieve without chemical fertilisers at all!

Therefore, the basic principle of organic fertiliser replacement is to replace chemical fertiliser according to the fertility of the soil, when the fertility is low, the replacement is lower, when the fertility is high, the replacement can be more, fertilisation of the soil is the most effective measure to lose weight and increase efficiency.

The figures show that in Europe and the United States, the land power contribution rate is 72%, while ours is only 52%. The poor quality of arable land and the high use of liquid fertilisers inevitably result in a low land power contribution rate, and this set of figures is sufficient to show that China is exchanging a large amount of liquid fertiliser inputs for high grain yields.

Therefore, improving the fertility of agricultural soils is the key to the problem!


Why replace chemical fertilizers

Take nitrogen fertiliser as an example: a European nitrogen assessment report, recently completed by over 200 researchers from several countries, concluded that the levels of reactive nitrogen in the environment have increased significantly since man invented synthetic nitrogen fertiliser. Nitrogen pollution is becoming one of the major environmental challenges of the 21st century. The annual cost of nitrogen pollution in Europe is between 70 billion and 320 billion, which is equivalent to more than twice the annual return on European agriculture and has high environmental costs. At the same time life expectancy has been reduced.

It is now fully recognised that all fertiliser-based agricultural industries, not only in Europe but also in China, are losing money. Including the "continuous increase" in our agriculture, we only count the cost of inputs and labour, but not the cost of environmental pollution, soil contamination and health.


Nitrogen fertilizer contributes significantly to increased agricultural yields

From a crop physiological point of view, there are specific periods in the development of a crop when the absolute amount of a particular nutrient requirement is small, but urgent.

During this period it takes 3-5 days for the crop to be supplied with the nutrients it needs. If the required nutrients are not supplied in an efficient and timely manner, even if they are added later, the desired effect will not be achieved.

One of the main reasons why organic fertilisers are not as effective as chemical fertilisers in increasing yields is that organic fertilisers are slow releasing nutrients and most do not have the advantage of chemical fertilisers being "fast acting".

Because organic fertilisers release nutrients slowly, they do not provide enough energy at the critical point when plants need nutrients, whereas chemical fertilisers can supply nutrients efficiently and quickly, thus enabling high yields.


To replace chemical fertilisers without reducing yields, a fast-acting alternative type of fertiliser is needed biological nitrogen fertilisers. Biological nitrogen fixation research is helping plants to get more nitrogen from the air, helping them to get more natural nitrogen, and gradually freeing agroforestry production from dependence on chemical sources of nitrogen.

The search for biological sources of nitrogen is now an evergreen topic internationally, as Norman Braugher, the father of green agriculture in the USA, has also stated that the search for biological sources of nitrogen is to gradually move away from dependence on chemical sources of nitrogen, to mitigate and eliminate the energy, ecological, environmental and health risks of chemical nitrogen fertilisers, and to restore ecological balance and achieve sustainable agricultural development.

Researchers at the University of Sydney, Australia, have achieved 40-70% nitrogen reduction without yield reduction and yield increase in rice cultivation using only one technology, microbial bacterial seed dressing. Research by Professor Edward Coggin of the University of Nottingham, a member of the Royal Society, suggests that biological nitrogen fixation can be used to replace chemical fertilisers on almost all plants.


How to ensure weight loss and increased effectiveness

After calculations, the potential of organic fertilizers to replace chemical fertilizers is about 10%, research and development of new fertilizers, mainly including organic and inorganic compound fertilizers, about 10% to 15%, the use of intelligent machines can be increased to 10% to 12%. Together, these three technologies can reduce the application of chemical fertiliser nutrients by 28% to 37% in the future.

The objective of the whole project is to implement three major innovations, two major guarantees and one goal around four major crops (food crops, cash crops, vegetables and fruit trees).

The low quality of farmland largely limits the efficient use of fertilisers, and organic substitution is one of the main techniques for reducing and increasing the efficiency of chemical fertilisers.

The current degradation of the quality of arable land is due to the irrational use of fertilisers in some parts of the country, not to the fertilisers themselves, which, if applied wisely, do not lead to soil degradation.

Our team has been experimenting with organic fertilisers as an alternative to chemical fertilisers for over 20 years. We have found that when the organic matter content of the soil reaches 30 grams per kilogram, organic fertilisers can replace chemical fertilisers 100 per cent and maintain high yields.

We have also found through our research that although soil fertility is relatively high in the EU, organic farming in orchards has only a 3% impact on yields, whereas on farmland it can reach 20%.

Therefore, the basic principle of organic fertiliser substitution is to substitute according to soil fertility, when fertility is low, the substitution is lower, when fertility is high, the substitution can be more, fertilisation of the soil is the most effective measure to lose weight and increase efficiency.


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