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Título: | Salinity–Grain Yield Response Functions of Barley Cultivars Assessed with a Drip-Injection Irrigation System |
Autor: | Royo, Antonio CSIC; Aragüés Lafarga, Ramón CSIC; Playán Jubillar, Enrique CSIC ORCID ; Ortiz, Ramón CSIC | Palabras clave: | source sprinkler system Crop salt tolerance |
Fecha de publicación: | ene-2000 | Editor: | Crop Science Society of America | Citación: | Soil Science Society of America Journal 64 (1): 359-365 (2000) | Resumen: | Success in breeding crops for yield and other quantitative traits depends on the use of convenient methods to accurately evaluate genotypes under field conditions. We report the evaluation of a drip-injection irrigation system (DIS) for assessing the salt tolerance of barley genotypes. Ten barley cultivars were randomized within each of nine salinities imposed by a DIS in an experiment with two replications. Grain yields were regressed against soil salinity (ECe) using a sigmoidal growth response model to obtain the statistics Ym, ECe50, and p. The data fitted the model well; the average correlation coefficient was 0.89 (P < 0.001) when the observations for each cultivar in both replications were pooled, and the average SEs were <12% of the mean Ym and ECe50 estimates. We concluded that the DIS is a reliable system for estimating the salinity response functions of barley. The grain yields obtained in the control EQUATION-See PDF and intermediate EQUATION-See PDF soil salinity were highly correlated ( EQUATION-See PDF , P < 0.01), indicating that the highest-yielding cultivars under nonsaline conditions were also most productive under intermediate saline conditions. However, yields at high soil salinity EQUATION-See PDF were not correlated with the control yields. For the same set of genotypes, the estimates of ECe50 obtained with the DIS and with a triple-line source system (TLS) were strongly correlated ( EQUATION-See PDF , P < 0.01), even though the direct absorption of salts by the leaves, which is a feature of the TLS, had a deleterious effect on grain yields. Results from the DIS trial EQUATION-See PDF suggest that the salt tolerance of barley quoted in the literature for similar climatic conditions EQUATION-See PDF could be overestimated by 40%. | Descripción: | 7 Pag., 3 Tabl., 5 Fig. | Versión del editor: | http://dx.doi.org/10.2136/sssaj2000.641359x | URI: | http://hdl.handle.net/10261/28077 | DOI: | 10.2136/sssaj2000.641359x | ISSN: | 0361-5995 |
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