TABLE 2.

Promoting effects of HIF treatments on citrus plant and root growth.

Content	Treatment	Control	P-value
Plant height (cm)	104.58 ± 13.42a	84.21 ± 14.39b	0.049
Canopy diameter (cm)	71.24 ± 11.76a	55.57 ± 8.07b	0.038
Root projection area(cm2)	867.69 ± 162.59a	561.99 ± 188.37b	0.025
Leaf thickness(mm)	0.27 ± 0.02a	0.25 ± 0.01b	<0.01
SPAD value	76.21 ± 2.78a	59.97 ± 6.99b	<0.01
Nitrogen content (mg/g)	23.37 ± 0.83a	18.46 ± 2.30b	<0.01

The “different letters” provided in this table denotes the differences between groups reached a significant level (P < 0.05).