Relationships Between Carbon Isotope Discrimination and Yield of Spring Wheat Under Different Water and Nitrogen Levels
- 9 May 2007
- journal article
- research article
- Published by Taylor & Francis Ltd in Journal of Plant Nutrition
- Vol. 30 (6), 947-963
- https://doi.org/10.1080/15226510701375572
Abstract
A greenhouse experiment was conducted to investigate the relationships between foliar carbon isotope discrimination (Δ) and above ground dry matter (ADM) at different stages during a plant's life cycle, and grain carbon isotope discrimination and grain yield (GY) at maturity of spring wheat (Triticum aestivum L.) under different nitrogen (N) and water levels. Results showed that ADM and GY both increased significantly with decreasing water stress, while the effects of nitrogen on ADM and GY varied with the water conditions. Foliar and grain carbon isotope discrimination decreased with increasing water stress and increasing nitrogen levels. For all water conditions, relationships between carbon isotope discrimination (foliar and grain) and yields (ADM and GY) were significantly positive (P < 0.001) at various growth stages. However, at the same water level, the correlations were complex, and under well-watered conditions, ADM and GY were strongly and negatively correlated with foliar and grain carbon isotope discrimination at all growth stages (P < 0.001). The correlations were inconsistent and not significant at moderate water level, but were positive under drought. Our results showed that water and nitrogen both significantly affected the relationships between yield and carbon isotope discrimination of spring wheat, that there are interactions between these two parameters, and that environmental conditions such as water and fertilizer must thus be considered in future research on the relationship between yield and carbon isotope discrimination of spring wheat.Keywords
This publication has 24 references indexed in Scilit:
- Irrigation and fertilization effects on foliar and soil carbon and nitrogen isotope ratios in a loblolly pine standForest Ecology and Management, 2005
- Environmental Factors Determining Carbon Isotope Discrimination and Yield in Durum Wheat under Mediterranean ConditionsCrop Science, 2003
- Effects of soil water deficit and nitrogen nutrition on water relations and photosynthesis of pot-grown Coffea canephora PierreTrees, 2002
- Improving Intrinsic Water-Use Efficiency and Crop YieldCrop Science, 2002
- Nitrogen and Water Stress Interact to Influence Carbon‐13 Discrimination in WheatSoil Science Society of America Journal, 2001
- Uptake and agronomic efficiency of nitrogen in winter barley and winter wheatEuropean Journal of Agronomy, 1998
- Relationships between ash content, carbon isotope discrimination and yield in durum wheatFunctional Plant Biology, 1998
- Broad sense heritability and genotype × environment interaction for carbon isotope discrimination in field-grown wheatAustralian Journal of Agricultural Research, 1992
- Carbon isotope discrimination and grain-yield in barleyField Crops Research, 1991
- Carbon Isotope Discrimination is Positively Correlated with Grain Yield and Dry Matter Production in Field‐Grown Wheat1Crop Science, 1987