Why do plants need nitrogen and how do plants obtain nitrogen?
Why do plants need nitrogen and how do plants obtain nitrogen?

Why do plants need nitrogen and how do plants obtain nitrogen?

Plants are part of nature. They play a key role in developing nature, providing shelter to various birds and animals. They clean the atmosphere by absorbing all the bad gases and making it fresh for living beings to breathe. This is the wonder of nature and God! Plants are called autotrophs generally. This is because they prepare their own food through the process of photosynthesis. This process takes place in the leaf part of the plant. We need air, water, and sunlight to perform photosynthesis. Also, during school days, we were taught that plants take up CO2(Carbon dioxide) and leave O2(Oxygen). But do you know that nitrogen (N2) is also an important element for plants? Why do plants need nitrogen? And this might sound bizarre but I’m asking you again that what is the need for nitrogen to plants? 

Importance of Nitrogen

Why do plants need Nitrogen(N2)? Well, Nitrogen plays a vital role in the growth of a plant. They help in making the soil fertile which in turn makes the plant grow healthy. Moreover, another advantage of why nitrogen is needed is, that it is a part of the chlorophyll molecule. And chlorophyll is a pigment due to which the plants look green in color. As it also plays a part in photosynthesis. The chloroplast is a part of the leaf where the food is prepared for plants. There is a separate plant kingdom where plants grow with the help of nitrogen. It’s called leguminous plants, you might have come across this word.

Leguminous plants have root-like nodules called legumes in which the nitrogen fixation takes place. These nodules and bacteria called rhizobia are generally present in the soil. Here, they help each providing each other’s necessities, hence, developing a symbiotic relationship. And so, this way the plants grow and the soil also gets fertile. 

Role of Symbiosis

Symbiosis plays a crucial role in nature’s evolution. These leguminous plants contain the essential proteins and therefore are healthy and should be a part of our diet. Some of the examples include chickpea, pigeon pea, groundnut, etc. For plant development, nitrogen-based fertilizers are present in the market. The demand for it is high. 

Nitrogen Cycle

Our atmosphere contains 78% Nitrogen. Yet the plants cannot take up the Nitrogen directly from the atmosphere like Carbon dioxide. Amino acids, nitrides and other nitrogenous inside the soil are the different forms of Nitrogen. This happens through a process called Nitrogen Cycle. Plants need this continuous cycle. Nature evolves with the help of this cycle.

Effect of pollution on the Nitrogen Cycle

These days, the increase in pollution has diminished the growth of plants and pollution affects the cycle. Plants die and trees fell. A high dosage of fertilizers is making the crops lose all their nutrients. We should contribute to nature as we live and use it for our necessities. If we keep on neglecting this problem, our future generations will be left with no fresh air. They’ll have to breathe using oxygen masks. Few trees will remain at that time. There will be fewer vegetables and fruits to consume. There will be artificial environments provided for plant growth.

This is hard to imagine, right? Therefore, let’s pledge to plant at least 5-10 saplings per year and see the changes! So that we’ll not have to face the crisis and can provide our future generations with a pollution-free environment.

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