2018 ASHS Annual Conference

The use of organic and inorganic mulching helps plants to grow by inhibiting the growth of weeds, retaining soil moisture, and regulating the

temperature of soil. The objective of this study was to determine the effects of different organic mulches on weed presence, soil characteristics, and

growth of Zinnia elegans. The mulches used in studying Zinnia elegans were wheat straw, non-shredded Miscanthus (M. × giganteus), and shredded M.

× giganteus mulch. A Randomized Complete Block Design (RCBD) was used in the study, with different quantitative methods used to collect data, and

ANOVA tests were utilized to statistically analyze data. The research found that shredded Miscanthus × giganteus was the most useful mulch in reducing

weed pressure. The results of the study also showed a statistically significant difference between mulch treatments and the control, on Zinnia

elegans growth. The use of non-shredded M. × giganteus and wheat straw resulted in significant increased macronutrient and micronutrient levels in

the soil. Also, non-shredded M. × giganteus mulch correlated with increased stem diameter, stem length, flower set, and the formation of flower buds,

as compared to wheat straw and shredded M. × giganteus.