Uptake and utilisation of phosphorus and nitrogen by bread wheats grown under natural rainfall

摘要: Wheat genotypes were grown in a Mediterranean environment 3 seasons with levels of applied phosphorus (P) and nitrogen (N) fertilisers. Phosphorus N concentrations measured mature grain straw. The amounts distributions these nutrients calculated differences between related to plant yield components. Harvest index was more highly positively correlated, than yield, nutrient harvest per unit shoot P, but negatively correlated concentrations. For each percentage point increase index, protein declined by 0.08 points 0.0015 points.It is suggested that improved utilisation wheat possible through increases direct selection similar index. Examples are given show for low P can proceed association high