Evidence on the response of Patagonian forage grasses to the mulching effect of recent tephra deposits in Argentina
- Edwards, Priscila
- Varela, Santiago A.
- López, Dardo Rubén
- Willems, Priscila M.
- López, Aldana Soledad
- Gyenge, Javier Enrique
DOIAbstract
In Patagonia, arid and semiarid lands are being affected both by inappropriate management practices, which are leading to degradation, and by volcanic activity, whose effects are still unclear. This study aimed to test whether superficial deposition of volcanic tephra could benefit two of the most prominent Patagonian forage grass species (Poa ligularis and Pappostipa speciosa var. speciosa). Pots with P. ligularis and P. speciosa were kept under wet (W) and dry (D) conditions in the presence (T+) or absence (T−) of tephra for 105 days, and then were all well-watered. We determined the effects of tephra on soil water retention and conservation, soil moisture content (% v/v), plant growth, stomatal conductance (gs), and gs recovery capacity....
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