Table 5.
Effect of Terra Sorb® radicular (BS‐1) and Terramin® Pro (BS‐2) on nitrogen (N) efficiency parameters of lettuce plants grown under three different N supplies
| NUpE (mg N g−1 DW) | NUtE (g2 DW mg−1 N) | NUE (g DW) | |
|---|---|---|---|
| N‐100% | 380.85 ± 42.91c | 0.077 ± 0.009b | 28.85 ± 1.20c |
| N‐100% + BS‐1 | 425.78 ± 19.89b | 0.092 ± 0.004a | 39.25 ± 3.67b |
| N‐100% + BS‐2 | 568.05 ± 16.04a | 0.091 ± 0.003a | 51.44 ± 2.43a |
| P‐Value | *** | *** | *** |
| N‐100% | 380.85 ± 42.91c | 0.077 ± 0.009b | 28.85 ± 1.20c |
| N‐60% | 272.29 ± 6.34d | 0.078 ± 0.002b | 21.34 ± 0.86d |
| N‐60% + BS‐1 | 414.203 ± 23.58b | 0.097 ± 0.006a | 40.03 ± 1.34b |
| N‐60% + BS‐2 | 486.98 ± 23.29a | 0.093 ± 0.005a | 45.05 ± 0.36a |
| P‐Value | *** | *** | *** |
| N‐100% | 380.85 ± 42.91a | 0.077 ± 0.009d | 28.85 ± 1.20c |
| N‐30% | 141.30 ± 26.71d | 0.110 ± 0.021c | 15.23 ± 2.09d |
| N‐30% + BS‐1 | 199.77 ± 8.30c | 0.161 ± 0.007a | 32.18 ± 1.98b |
| N‐30% + BS‐2 | 311.15 ± 7.15b | 0.131 ± 0.003b | 40.84 ± 1.40a |
| P‐Value | *** | *** | *** |
Values are means ± standard error (n = 9) and differences between means were compared by Fisher's least‐significance difference (LSD) test (P = 0.05). Values with different letters indicate significant differences. The levels of significance were represented by P < 0.001 (***). NUpE, nitrogen uptake efficiency; NUtE, nitrogen utilization efficiency; NUE, nitrogen use efficiency; DW, dry weight.