Water balance in pure stand of Lehmann lovegrass

Lehmann lovegrass (Eragrostis lehmanniana Nees), an introduced warm season grass, has invaded grasslands in southern Arizona, in many areas replacing the native warm-season grasses. A water balance evaluation in a pure stand of Lehmann lovegrass showed that more soil water was used through evapotran...

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Bibliographic Details
Published in:Journal of range management 1994-09, Vol.47 (5), p.373-378
Main Authors: Frasier, G.W. (USDA, ARS, Rangeland Resource Research Unit, Fort Collins, CO.), Cox, J.R
Format: Article
Language:English
Subjects:
AGUA DEL SUELO
ARIZONA
BALANCE HIDRICO
BILAN HYDRIQUE
BIOMASA
Biomass production
BIOMASSE
CAPACIDAD DE FIJACION DEL AGUA
CAPACITE DE LIAISON DE L'EAU
EAU DU SOL
ERAGROSTIS
ESPECE
ESPECIES
EVAPOTRANSPIRACION
EVAPOTRANSPIRATION
Grasses
Hydrology
LLUVIA
Moisture content
Natural springs
PLUIE
Precipitation
RELACIONES PLANTA AGUA
RELATION PLANTE EAU
Soil depth
Soil profiles
Soil water
Soil water balance
Soil water content
VARIEDADES NATURALIZADAS
VARIETE INTRODUITE
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Summary:Lehmann lovegrass (Eragrostis lehmanniana Nees), an introduced warm season grass, has invaded grasslands in southern Arizona, in many areas replacing the native warm-season grasses. A water balance evaluation in a pure stand of Lehmann lovegrass showed that more soil water was used through evapotranspiration than occurred as precipitation during 2 years of a 3-year study period. During the winter season, an appreciable amount of water was used by Lehmann lovegrass or lost by evaporation from the soil surface. The remaining available soil water was used in the spring dry period. In the dry early spring the soil water contents (to depths of 120 cm) were less than the traditional wilting point tension of -1.5 MPa. The invasion of Lehmann lovegrass into grasslands of southern Arizona is partially related to its ability to utilize soil water during parts of the year when the native species are dormant and also to extract water from the soil profile to very low water contents
ISSN:0022-409X
2162-2728
DOI:10.2307/4002333