Table II.

Estimated contributions of predefoliation reserves to accumulation of carbohydrate- and amino-C in regrowing tillers of perennial ryegrass on d 1 and 2 after severe defoliation

Parameter	d 1		d 2
	Amino-C	CHO-C	Amino-C	CHO-C
Accumulation rate of predefoliation C (mg tiller−1 d−1)	0.27	0.27	0.21	0.07
Fraction of predefoliation C accumulation	0.50	0.50	0.75	0.25
Fraction of total (i.e. pre- plus postdefoliation) CHO-C  accumulation	—	1.01	—	0.13

Predefoliation amino-C accumulation rate was calculated as accumulation rate of predefoliation N (Fig. 4B) times 2.6 (see text). The accumulation rate of reserve-derived carbohydrate-C (CHO-C) was estimated as the accumulation rate of predefoliation C (Fig. 4A) minus the accumulation rate of predefoliation amino-C, as defined above.