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The aim is to record the data growth of Duckweed and see what nutrients help duckweed grow quicker

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´╗┐Experimental Investigation Task| Table of Contents Abstract: Introduction: Aim: Hypothesis: Variable (Independent Variable) Dependent Variable (Quantities) (Qualitative) Materials: Method Discussion: Conclusions: Reference: ????????????????????????????????..??9 Abstract: Duckweed species are small floating aquatic plants found worldwide and often seen growing in still waterways or ponds. They can survive and recover from extremes of temperature nutrient loadings, nutrient balance and PH. It belongs to the Lemnaceae family, a group of smallest flowering plants with no leaves or stems, through some have roots. It can produce varieties of duckweed but they rarely do and live in aquatic environment with no soil. A nutrient helps duckweed grow like nitrogen, phosphorus and potassium. It also helps to convert waste and sewage water into pure water. The variable of this report is whether the duckweed are going to be put in normal water or water with added nutrients and which type of nutrients it will be. The aim is to record the data growth of Duckweed and see what nutrients help duckweed grow quicker. They will examine to see if duckweed will grow or die and what will be the effect of its rapid growth using these nutrients. The data record in showed in one of this pages how they grew and died in different days. They observed and examined in 12 days and see what would be the effect of the nutrients in duckweed. ...read more.


Also is to investigate the factors that affect the growth of Duckweed in South East Queensland. Hypothesis: 1. It is hypothesised that the duckweed growing in the water containing the nutrients nitrogen and phosphorus will grow faster than the duckweed growing in the water no added nutrients. This is because the ability for duckweed to grow is highly affected by nutrient availability and grows better in electrophic conditions. Variable (Independent Variable) 1. Whether the duckweed are going to be put in normal water or water with added nutrients and which type of nutrients it will be. 2. The effect of the variables grows on low nutrient water and is high fibre but contain low crude protein. In which duckweed respond quickly to the availability of nutrients they often have highly variables of some nutrients which make them difficult to prescribe the amount needed for. 3. Duckweed plants grow faster when nitrogen levels are high in water. Pollution significantly increases nitrogen levels. Duckweed plants can reduce the amount of pollution in water, but still may have negative effects on marine ecosystems because of increased growth. Dependent Variable (Quantities) 1. Approximately how much duckweed is in the water each day. Measured by counting the approximate number of duckweed. Grids may be used later on the experiment where there is too many duckweed to count. ...read more.


Lastly is the distilled water where it got the second largest amount of duckweed they may not grow faster as the phosphorus nutrient does it still developed and gain a bit each day. The result is quite poor; it doesn?t meet what we expected it will be. Just like the number of duckweed in each containers got drop every single day and some of them died though we don?t have enough data to show how much duckweed counted in each day died. That maybe because of the amount of concentrations we put in each containers cause them to die easily. Another problem we encountered is the small dirt thing floating in the water with the duckweed; I think it is one of the problems why some of them got a poor result as weren?t expected to be. ________________ Conclusions: I think my hypothesis support our result and aim for this experiment. We did observed which of the nutrients got the fast rapid growth of duckweed and which one has the fair amount of duckweed. As what it shown the table and graph result, Phosphorus got the highest and fast growth rate of duckweed within 12 days and Nitrogen got the lowest amount of duckweed for those days. On the other hand there are some errors like some of the duckweed died due to the high concentration just for example the nitrogen don?t grew because of too much amount of nutrients added to it. Experimental Investigation Task Ecology Assignment ( DUCKWEED) ...read more.

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