The crops water and nitrogen exchange under conditions of different water supply

摘要

The spring wheat and maize water and nitrogen exchange has been studied under conditions of different water supply. The specific reaction of the different spring wheat cultivars to water stress was determined. It is shown that kinetics of the water entering in leaves, stems and roots is conditioned by adaptive level of the control mechanisms of wheat genotypes water exchange to water stress. It is ascertain, that the absorption by roots and distribution of ~15N in maize hybrids and teosinte organs, inclusion it in total and albuminous nitrogen is dependent on water supply level and genotypes property.