Nitrogen economy of the main shoot of field grown barley (Hordeum vulgare L.) III. Content of reduced nitrogen in different organs

Abstract

Nitrogen concentration pattern and total nitrogen content in the various organs of the main shoot of field grown Jyoti barley at 40 kg N ha^-1 were determined. The laminae had a much higher N concentration (µmol g^-1 dry wt.) than the other organs at a corresponding stage. The major amount of N accumulates in the main shoot by ear emergence. An observation of interest is the decline in the total N content of the laminae before anthesis. The results are discussed in relation to mobilization of N within the shoot and the contribution of the vegetative parts to the N in developing grains.