Abstract
Abstract Shoot material from several species (Digitaria, Setaria, Phalaris, ryegrass, maize, and white clover) dried by 4 different methods was analysed for total nitrogen, soluble sugar, and starch concentrations. Recoveries of sugars and starch were best from freeze-drying; rapid heating (100°C/l h) followed by slow heat-drying (50°C/23 h), or vacuum-drying at 40°C were only marginally inferior for the recovery ofstarch and sugars respectively. Substantiallosses ofboth sugars and starch resulted from heat-drying at 95°C. Total nitrogen recovery was highest in heat-dried tissue and lowest in freeze-dried, Tissue of some species held for 4 h under warm conditions, before drying, had significantly different soluble sugar and starch concentrations compared with tissue dried immediately after harvest.
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