Poster

         Ecophysiology

The effects of drought and intraspecific competition on the development and growth of corn

Presenting Author
Brian Maricle
Description
Corn is an important agricultural plant. Production of corn is influenced by environmental factors such as drought and crowding of plants. In this experiment, the effects of intraspecific competition and drought were measured to evaluate the growth and development of corn. Height, chlorophyll content, anthesis, flowering, and biomass were measured in pots with varying densities of corn. Densities of five, four, three, two, and one corn plant(s) were sown in control or drought treatments in greenhouse conditions. Drought and crowding conditions both reduced growth of plants, with each causing a decrease in biomass by 25 to 50 percent. Similarly, flowering and anthesis were both reduced by drought and crowding, with drought having a particularly strong effect. In droughted plants, most plants did not reach anthesis. Drought and crowding conditions caused a decrease in anthesis, height, biomass, and flowering. Crowding causes plants to compete for resources such as water, nutrients, and sunlight. Drought limits a plant’s intake of water, which also manifests in reductions of photosynthesis, growth, and development. Drought and crowding conditions should be considered when grown for agricultural purposes, especially with corn being such a vital crop.