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Published in:
2013 | OriginalPaper | Chapter
Enhancement of Germination and Early Growth of Different Populations of Switchgrass (Panicum virgatum L.) by Compost Humic Acids
Authors : A. Traversa, E. Loffredo, A. J. Palazzo, T. L. Bashore, N. Senesi
Published in: Functions of Natural Organic Matter in Changing Environment
Publisher: Springer Netherlands
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Abstract
Compost humic acids are known to exert significant bioactive effects on soil organisms including plants. Three humic acids isolated from a green compost (GC-HA), a mixed compost (MC-HA), and a coffee compost (CC-HA) were tested at concentrations of 10, 50, and 200 mg L−1 on the germination and early growth of four switchgrass populations, Shawnee, Alamo, Shelter, and Dacotah. Experiments were performed in a climatic chamber under controlled conditions. An increase of germination percentage and a stimulation of primary root and shoot growth were observed as a function of the population, the plant part examined, and the HA type and dose applied.