Organic fertilizers are mainly derived from plants and/or animals, and are applied to the soil to provide plant nutrients as their main function. Processed from biological matter, animal and plant waste, and plant residues, they eliminate toxic and harmful substances and are rich in a large number of beneficial substances, including: a variety of organic acids, peptides, and rich nutrients including nitrogen, phosphorus, and potassium.
1. Provide comprehensive nutrients, organic fertilizer is a complete fertilizer
It contains nutrients and various beneficial elements required by crops, and the nutrient ratio is comprehensive, which is conducive to crop absorption. Therefore, the more organic fertilizer is applied, the more conducive it is to the balance of soil nutrients, and the more conducive it is to the absorption and utilization of soil nutrients by crops. It will not cause a large increase in a certain nutrient element in the soil due to the application of more organic fertilizer, which will destroy the soil nutrient balance.
2. Promote soil microbial breeding
Organic fertilizers contain a large amount of organic matter, which is where various microorganisms grow and breed. Soil nitrogen-fixing bacteria have nearly doubled compared with the control, fiber-decomposing bacteria have increased by nearly 2 times, and other microbial communities have also increased significantly, so the application of organic fertilizers can greatly promote the ripening process of newly reclaimed land. In addition, organic fertilizers can also produce various phenols, vitamins, enzymes, auxin and other substances during the decomposition process, which can promote the growth of crop roots and the absorption of nutrients. Experiments have proved that rapeseed cakes are particularly effective in tea gardens. Not only is the vegetable cake fertilizer rich in nutrients, but more importantly, the rapeseed cake produces a substance that can stimulate root growth during the decomposition process, promoting the growth of tea roots and absorbing nutrients. Other organic fertilizers also have similar effects.
3. Improve soil fertility and water retention capacity
All organic fertilizers have strong cation substitution ability, which can absorb more nutrients such as potassium, ammonium, magnesium, and zinc, prevent leaching, and improve the soil's fertilizer retention ability, especially the fertilizer retention ability of decomposed organic fertilizers. In addition, organic fertilizers also have a strong buffering capacity, which can prevent acidity changes and soil compaction caused by long-term application of chemical fertilizers, which can improve the soil's own stress resistance and ensure a good ecological environment.
4. Reduce nutrient fixation and improve nutrient availability
Organic fertilizers contain many organic acids, humic acids, hydroxyl groups and other substances, which have strong chelating ability and can form chelates with many metal elements such as manganese, aluminum, iron, etc., which can reduce the harm of manganese ions to crops. It can also prevent aluminum and phosphorus from combining into closed-storage phosphorus that is difficult to be absorbed by crops and become ineffective, greatly improving the effectiveness of soil available phosphorus.
5. Accelerate the formation of soil aggregates and improve soil physical and chemical properties
Organic-inorganic aggregates are an important indicator of soil fertility. The more it contains, the better the physical properties of the soil, the more fertile the soil, the stronger the ability to retain soil, water and fertilizer, the better the aeration performance, and the more conducive it is to the growth of crop roots.
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