. 2021 Aug 24;10(9):1758. doi: 10.3390/plants10091758

Table 2.

The N content of the above-ground plant tissues, the Above-ground and Total N Uptake, and the N indices, as affected by the fertilization.

Treatments	N Content of the Above-Ground Tissues (%)	Above-Ground N Uptake (kg ha⁻¹)	Total N Uptake (kg ha⁻¹)	NHI	NUtE
			2018
0 N	0.40 ^a	5.70 ^a	37.92 ^a	0.849 ^ns	28.752 ^a
20N	0.42 ^b	6.29 ^b	42.13 ^b	0.851 ^ns	28.015 ^b
30N	0.44 ^b	6.82 ^c	47.30 ^c	0.856 ^ns	27.434 ^b
40N	0.47 ^c	7.57 ^d	52.73 ^d	0.857 ^ns	26.643 ^c
50N	0.49 ^cd	8.37 ^e	55.82 ^e	0.850 ^ns	25.979 ^d
60N	0.51 ^d	9.01 ^f	58.25 ^e	0.845 ^ns	25.352 ^e
			2019
0 N	0.40 ^a	5.67 ^a	40.85 ^a	0.863 ^ns	28.845 ^a
20N	0.43 ^b	6.28 ^b	44.33 ^b	0.861 ^ns	27.869 ^b
30N	0.45 ^b	6.88 ^c	47.39 ^c	0.856 ^ns	27.422 ^b
40N	0.48 ^c	7.59 ^d	50.48 ^d	0.852 ^ns	26.780 ^c
50N	0.49 ^cd	8.14 ^e	53.38 ^e	0.848 ^ns	26.156 ^d
60N	0.52 ^d	8.81 ^f	56.33 ^f	0.845 ^ns	25.756 ^e
F_Fert	38.496 ^***	96.627 ^***	218.425 ^***	2.62 ^*	125.632 ^***
F_Year	ns	ns	ns	ns	ns
F_{Fert × Year}	ns	ns	6.361 ^***	ns	ns

Means within a column followed by the different letters are significantly different at p = 0.05. (“ns”: not statistically significant; *: statistically significant for a significance level of p < 0.05; ***: statistically significant for a significance level of p < 0.001).