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Essay On Duckweed

1136 Words5 Pages

Introduction: Duckweed (genus-Lemna) is a common group of plants found in lakes, ponds and slow-moving rivers. One can grow duckweed in standing water with small amount of nutrients (minure, compost etc). Ammonia (NH3) solution is a common household cleaning substance. In this research we experimented on the growth of duckweed in water containing various concentrations of ammonia solution.
Aim: To determine whether ammonia solution will hinder the growth of duckweed in proportion to the concentration of ammonia.
Hypothesis: Ammonia solution will hinder the growth of duckweed in proportion to the concentration of ammonia.
Context: During our research we noticed a lack of information regarding the relationship between ammonia contaminated environment …show more content…

It is therefore often washed out by our water systems into rivers, lakes, dams and oceans. Ammonia is also present in certain fertilizers such as ammonia sulphate fertilizer and in industrial waste-waters; these are other mechanisms that allow ammonia to get into water bodies. Ammonia is a toxic and corrosive substance and therefore can be detrimental to living cells. Ammonia poisoning in humans can be lethal, hence it is classified as a severe pollutant.
Duckweeds are a group of plants that are found in ponds lakes and slow-flowing rivers, they are members of the Lemna genus. They are simple organisms, with leaves that are circular and flat. Due to their high growth rate, and their ability to absorb pollutants they are often seen as an effective means of removing pollutants from water.
In an experiment found online, the effect of ammonia on duckweed was tested in various concentrations. However different methods of calculating results were used and contradicting data was revealed. In concentration of more than 3mg/L there was a significant depression of duckweed growth. Contrastingly it was shown that a concentration of 8.85mg/L of ammonia did not inhibit duckweed growth. The results revealed are therefore inaccurate and inconclusive. (Wang

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