Carbon Isotope Discrimination and Water-Use Efficiency in Crotalaria Cover Crops under Moderate Water Deficit

The legume species Crotalaria juncea and Crotalaria spectabilis, used as cover crops (CC) in tropical and temperate zones, are being evaluated in Uruguay where their productive potential may be limited by periods of summer water deficit. In this study, C. juncea and C. spectabilis were sown in pots with soil as a substrate. After substantial growth (20 days), two different treatments of water (80% or 50% of field capacity) were imposed on the...