Table 2.

Effect of exogenous Z on the occurrence of wheat tiller under two different N environments (%).

Treatment	Tiller position-XN979					Tiller position-XY22
	III	I-p	IV	I-1	II-p	III	I-p	IV	I-1	II-p
CK	100 a	96.7 a	96.7 a	93.3 a	90.0 a	83.3 a	80.0 a	83.3 a	73.3 a	70.0 a
LN	53.3 c	56.7 c	33.3 c	30.0 c	30.0 c	50.0 c	46.7 c	33.3 c	30.0 c	36.7 c
LN-Z	93.3 a	90.0 a	76.7 b	66.7 b	70.0 b	80.0 a	73.3 a	53.3 b	56.7 b	50.0 b

Values followed by different letters within columns are significantly different at the 0.05 probability level. III: the thirdh primary tiller; I-p: the first secondary tiller from I; IV: the fourth primary tiller; I-1: the second secondary tiller from I; II-p: the secondary tiller from II. CK: deionized water was sprayed on the plants under normal condition. LN: basal fertilizer was applied at the rate of 22.5 kg N ha^-1, and deionized water was sprayed on the plants. LN+Z: basal fertilizer was applied at the rate of 22.5 kg N ha^-1, and 60 mg L^-1 Z was sprayed on the plants (n = 30).