Plant instrumentality project
Lillian Xu, Yu Hsuan Liang
Collingwood School
Floor Location : M 248 D

The purpose of our study is to examine the effect of silicon on plant growth with different levels of nitrogen in soil. The experiment will be conducted to determine the effect of Silicon, in the form of hydrated silica(SiO2.nH2O), in nitrogen stress. Silicon fertilizers do exist on the market in the form of potassium silicate; however, the use of it can only stand alone, which means that it cannot be used with N fertilizers or any other fertilizers. Therefore, silicic acid(as in how plants take in Si) is used in this experiment. We hypothesized that Si would be beneficial to plants in terms of Nitrogen excess. If appropriate amount of Silicon is added to nitrogen stressed plants, then there should be a difference in beneficial way compared to plants that has not been treated with silicon. Nitrogen is an essential element in plant growth that is a part of chlorophyll and also the part of plant metabolism. Excess Nitrogen results in the change in leaf colour, which leads to low efficiency of photosynthesis. Deficiency in nitrogen also is problematic for plants as they are lacking the essential element. Two sets of four plants will be used to conduct the experiment with two types of plants and each labelled with a amount of nitrogen and silicon treated. The results will be observed in around two weeks time. Although there are outliers that might be due to data measurement, the overall growth of the plants that are treated with silicon are better than the plants that are not treated. Although part of the conclusion did not follow our hypothesis, the effect of silicon on nitrogen stress is now proven to be beneficial.