alexa The influence of earthworm-processed pig manure on the growth and productivity of marigolds.
Genetics & Molecular Biology

Genetics & Molecular Biology

Advances in Molecular Diagnostics

Author(s): Atiyeh RM, Arancon NQ, Edwards CA, Metzger JD

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Abstract The effects of additions of earthworm-processed pig manure (vermicompost) on the growth and productivity of French marigold (Tagetes patula) plants were evaluated under glasshouse conditions. Marigolds were germinated and grown in a standard commercial greenhouse container medium (Metro-Mix 360), substituted with 10\%, 20\%, 30\%, 40\%, 50\%, 60\%, 70\%, 80\%, 90\%, and 100\% (by volume) pig manure vermicompost. The control consisted of Metro-Mix 360 alone without vermicompost. Plants were supplied regularly with a complete mineral nutrient solution for 121 days. The greatest vegetative growth resulted from substitution of Metro-Mix 360 with 30\% and 40\% pig manure vermicompost, and the lowest growth was in the potting mixtures containing 90\% and 100\% vermicompost. Most flower buds occurred in the potting mixtures containing 40\% pig manure vermicompost (19.4 buds), and fewest in the potting mixtures containing 100\% vermicompost. Marigolds grown in Metro-Mix 360 substituted with 90\% and 100\% pig manure vermicompost had the fewest and smallest flowers. After substitution of Metro-Mix 360 with 20\%, 30\%, 40\%, 50\%, 60\%, 70\%, 80\%, and 90\% vermicompost, the marigold roots were larger than those of plants grown in the Metro-Mix 360 controls. Substitution of Metro-Mix 360 with any concentration of pig manure vermicompost, with all needed nutrients provided, increased the overall nitrate-nitrogen concentrations of the marigold leaf tissues at flowering stage. Some of the marigold growth and productivity enhancement, resulting from substitution of Metro-Mix 360 with pig manure vermicompost, may be explained by nutritional factors; However, other, factors, such as plant-growth regulators and humates, might have also been involved since all plants were supplied regularly with all required nutrients.
This article was published in Bioresour Technol and referenced in Advances in Molecular Diagnostics

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