Artificial fertilisers first appeared in the late 1800s, paving the path for current agricultural production. For most of human history, agriculture has relied on the usage of natural fertilisers, which are compounds that raise the nutritional content in the soil. Artificial fertilisers continue to have comprehensive beneficial and dire consequences, and they are likely to stay a part of human existence for a long time.
Fertiliser refers to any material used to give nutrients to the soil to improve soil fertility and plant development. Unfortunately, while unsustainable farming and gardening methods persist, our soil’s health is eroded, and our need for additives grows. As a result, chemical fertilisers have some rather significant side effects.
Organic (natural) and inorganic (synthetic) fertilisers are the two types of fertilisers. Biofertilizers, green manure, organic manure, and compost are examples of organic fertilisers that occur naturally. They gradually leach key nutrients into the soil, improving its overall vitality over time.
Synthetic fertilisers are chemical and inorganic ingredients that humans have combined. They usually have various ratios of nitrogen, phosphorus, potassium, calcium, magnesium, and other components.
Chemical fertilisers can boost plant nutrients under severe weather conditions or when plants require additional nutrients, but they also have several adverse side effects. Waterway pollution, chemical burn to crops, increased air pollution, soil acidification, and mineral depletion are just a few of the problems that chemical fertilisers problems.
Environmental Impact
Synthetic fertilisers are said to destroy soil microbes, according to some sources. While this isn’t always true, the reality isn’t much better. Instead, the chemicals in synthetic fertilisers encourage soil bacteria and microorganisms, consuming more organic matter than plants can replenish. This depletes the soil of essential nutrients for plants, which is concerning because healthy soil is one of our planet’s most undervalued natural resources.
Chemical fertiliser usage on crops can negatively affect rivers due to fertiliser runoff. The amount of oxygen in the water is reduced due to an excess of nutrients in the water. The existing organisms use the remaining oxygen in the water. The fish perish as a result of the oxygen loss.
Excess nitrogen in crop fertilisation can contribute to greenhouse gas emissions such as carbon dioxide and nitrous oxide. Applying a higher amount of chemical fertiliser than the vegetation can readily absorb causes this effect. As per the National Oceanic and Atmospheric Administration’s Climate Monitoring and Diagnostics Lab, excess greenhouse gases trapped in the atmosphere may be contributing to rising land and ocean surface temperatures.
Chemical fertilisers include a lot of nitrogen and other nutrients. Chemical fertiliser overuse can cause plant leaves to become yellow or brown, harming the plant and lowering crop output.
Due to a loss in organic matter in the soil, overuse of chemical fertilisers can induce soil acidity. Large volumes of nitrogen sprayed to fields over time harm the topsoil, resulting in lower agricultural yields. Soil acidity is far more common in sandy soils than in clay soils. Clay soils can mitigate excess chemical fertilisation.
By reducing the importance of nitrogen-fixing bacteria and boosting the role of everything that feeds on nitrogen, fertiliser application begins the loss of soil biodiversity. The breakdown of organic debris and hummus is accelerated due to these feeders—the structure of soil changes when organic matter declines. Soils are less effective at holding water and air because they have less pore space and sponge-like properties.
The most serious problem with chemical fertilisers is groundwater pollution. Nitrogen fertilisers decompose into nitrates, which are easily absorbed by the soil. The addition of additional nitrogen over time has an accumulative impact since it is water-soluble and can persist in groundwater for decades.
Chemical fertilisers include artificial chemicals that damage the health of natural sources soil microorganisms by altering soil pH. The microorganisms that are helpful to plant and soil health and assist in improving the plants’ natural defences against pests and diseases are eliminated due to the changing levels of acidity in the soil. Antibiotic-producing bacteria and mycorrhizal and other fungi present in good soil are among these beneficial microorganisms.
We are all affected in some way by the detrimental effects of chemical fertilisers (and pesticides) because of their widespread, long-term use. Our ecosystem has been upset, and restoring equilibrium will require time and adjustment. But, while we can’t completely escape the negative impacts of chemical fertilisers, we can surely mitigate them by consuming organic foods.
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