Title

The Effects of the Combination of Glyphosate Potassium Salt and Ammonium Sulfate on Staurastrum sp

School Name

Spring Valley High School

Grade Level

11th Grade

Presentation Topic

Environmental Science

Presentation Type

Non-Mentored

Abstract

Across the country, farms commonly use glyphosate potassium salt-based herbicides to eliminate weeds. While glyphosate potassium salt is typically very effective, some weeds can become resistant to glyphosate potassium salt and require the addition of ammonium sulfate to be eliminated. The addition of ammonium sulfate aids the glyphosate potassium salt in breaking down the cell membranes of weeds. While these herbicides are incredibly effective when eliminating weeds, they can also break down nontarget organisms like algae. While the effects of glyphosate potassium salt on algae has been studied, the effects of glyphosate potassium salt combined with ammonium sulfate on algae has not been studied. It was hypothesized that the addition of ammonium sulfate would decrease the reproduction rate of Staurastrum sp, a North American algae strain. To test this, 7 groups of 10 trials were each exposed to various levels of glyphosate potassium salt and ammonium sulfate and were analyzed for their reproduction rates. One group was exposed to neither glyphosate potassium salt nor ammonium sulfate, one group was exposed to solely glyphosate potassium salt, and the rest of the groups were exposed to a constant amount of glyphosate potassium salt and various concentrations of ammonium sulfate. A one-way ANOVA test was run to test the significance of the results. The results of the ANOVA test (F(5, 54)=2.37, p=0.000473) support the hypothesis that the addition of ammonium sulfate to Staurastrum sp, when introduced to glyphosate potassium salt, decreases the growth of Staurastrum sp, although the Tukey post-hoc test determined the differences between groups were not significant.

Location

BS 349

Start Date

3-25-2023 10:00 AM

Presentation Format

Oral and Written

Group Project

No

COinS
 
Mar 25th, 10:00 AM

The Effects of the Combination of Glyphosate Potassium Salt and Ammonium Sulfate on Staurastrum sp

BS 349

Across the country, farms commonly use glyphosate potassium salt-based herbicides to eliminate weeds. While glyphosate potassium salt is typically very effective, some weeds can become resistant to glyphosate potassium salt and require the addition of ammonium sulfate to be eliminated. The addition of ammonium sulfate aids the glyphosate potassium salt in breaking down the cell membranes of weeds. While these herbicides are incredibly effective when eliminating weeds, they can also break down nontarget organisms like algae. While the effects of glyphosate potassium salt on algae has been studied, the effects of glyphosate potassium salt combined with ammonium sulfate on algae has not been studied. It was hypothesized that the addition of ammonium sulfate would decrease the reproduction rate of Staurastrum sp, a North American algae strain. To test this, 7 groups of 10 trials were each exposed to various levels of glyphosate potassium salt and ammonium sulfate and were analyzed for their reproduction rates. One group was exposed to neither glyphosate potassium salt nor ammonium sulfate, one group was exposed to solely glyphosate potassium salt, and the rest of the groups were exposed to a constant amount of glyphosate potassium salt and various concentrations of ammonium sulfate. A one-way ANOVA test was run to test the significance of the results. The results of the ANOVA test (F(5, 54)=2.37, p=0.000473) support the hypothesis that the addition of ammonium sulfate to Staurastrum sp, when introduced to glyphosate potassium salt, decreases the growth of Staurastrum sp, although the Tukey post-hoc test determined the differences between groups were not significant.