. 2021 Jun 7;12:665168. doi: 10.3389/fpls.2021.665168

TABLE 3.

Potassium use strategies of A. sparsifolia affected by 2.5, 4.5, and 11.0 m groundwater depths in 2015 and 2016.

2015	NP (g g^–1 year^–1)	MRT (year)	NUE (g g^–1)	NRE (%)	NRP (mg g^–1)
2.5 m	7.30 ± 4.17^a	0.98 ± 0.29^a	7.93 ± 5.47^a	17.92 ± 2.14^ab	16.78 ± 1.12^b
4.5 m	4.21 ± 2.91^a	0.76 ± 0.11^a	3.15 ± 2.36^a	7.21 ± 4.95^b	31.62 ± 1.29^a
11.0 m	4.04 ± 2.44^a	0.65 ± 0.08^a	2.67 ± 1.38^a	25.49 ± 5.91^a	12.11 ± 0.42^c
2016	NP (g g^–1 year^–1)	MRT (year)	NUE (g g^–1)	NRE (%)	NRP (mg g^–1)
2.5 m	0.95 ± 0.47^a	0.85 ± 0.15^a	0.76 ± 0.31^a	13.66 ± 6.33^a	17.62 ± 0.72^a
4.5 m	1.01 ± 0.52^a	0.70 ± 0.04^a	0.71 ± 0.38^a	19.96 ± 1.07^a	20.33 ± 3.09^a
11.0 m	0.41 ± 0.27^a	1.30 ± 0.51^a	0.47 ± 0.28^a	17.41 ± 9.12^a	14.64 ± 4.58^a

Means followed by different letters are significantly different at p < 0.05.

NP, nutrient productivity; MRT, mean residence time; NUE, nutrient-use efficiency; NRE, nutrient-resorption efficiency; NRP, nutrient-resorption proficiency.