Table 1.

Summary of the four experiments run in the field and in the glasshouse: P treatments and yield components at maturity

Growing conditions	Name	Applied P	Above-ground P content (mg per plant)	Grain DW (g per plant)	Shoot DW (g per plant)	HI	PHI	Productive tillers (n)	Late tillers (n)
Field	P-fertilized	26 kg ha−1	122·2 ± 10·3	41·8 ± 4·8	25·7 ± 0·7	0·62	0·90	NA	NA	NA
	P-deficient	No application	42·6 ± 14·9	23·9 ± 5·9	18·2 ± 2·9	0·56	0·85	NA	NA	NA
Hydroponic	Opt-P	89·7 mg per plant d−1	54·6 ± 7·3	28·4 ± 3·1	38·9 ± 3·7	0·42	0·65	16·3 ± 2·4	2·4 ± 1·5	<3 %
	Low-P	16·4 mg per plant d−1	13·6 ± 0·4	7·9 ± 0·85	10·1 ± 0·6	0·44	0·65	5·5 ± 0·5	1·3 ± 0·3	<3 %

Mean values of three to four replicates are given. Standard deviations are presented in italic. NA, not applicable.