Abstract
Abstract In three nutritive evaluation trials sheep grazing pastures of a “Low Cellulose” selection from ‘Grasslands Ariki’ hybrid perennial ryegrass showed consistent but non-significant increases in live-weight gain of 3-7% over the higher cellulose Ariki ryegrass. In two trials live-weight gains of sheep grazed on Ariki showed non-significant increases of 7-11 % over the generally higher cellulose ‘Grasslands 4708’ tetraploid hybrid ryegrass, and in one trial live-weight gains on the Low Cellulose selection were significantly higher (14%) than 4708. The results are discussed in relation to the use of cellulose content and leaf tensile strength as selection criteria for improving feeding value of ryegrass.
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