Table 5.
Shoot dry weight (SDW) and total N accumulated in shoots (TNS) at V4 and grain yield at the maturity of maize hybrid DKB 350 YG inoculated or not Azospirillum brasilense strains Ab-V5 + Ab-V6 and supplemented or not with concentrated metabolites of Rhizobium tropici CIAT 899 (CM-RT1)
|
Treatment/Site |
Bonito |
Ponta Grossa |
Três Lagoas |
||||||
|---|---|---|---|---|---|---|---|---|---|
| |
V4 |
|
V4 |
|
V4 |
|
|||
| |
SDW |
TNS |
Yield |
SDW |
TNS |
Yield |
SDW |
TNS |
Yield |
| (g pl–1) | (mg pl–1) | (kg ha–1) | (g pl–1) | (mg pl–1) | (kg ha–1) | (g pl–1) | (mg pl–1) | (kg ha–1) | |
| 0%N |
13.1 a |
402 a |
5452 b |
17.2 c |
255 c |
5708 c |
7.1 c |
161 b |
2444 b |
| 100%N |
16.1 a |
510 a |
6184 ab |
26.4 ab |
558 ab |
8483 a |
9.7 a |
252 a |
2965 ab |
| 75% N |
12.4 a |
407 a |
5516 b |
24.2 ab |
511 b |
7964 ab |
9.4 ab |
243 a |
3010 ab |
| 75% N + Inoculated with A. brasilense |
14.0 a |
412 a |
5625 ab |
22.1 bc |
445 b |
7208 b |
7.9 bc |
201 b |
3319 a |
| 75% N + Inoculated with A. brasilense + CM-RT1 (1 mL L–1) |
11.5a |
399 a |
6091 ab |
25.5 ab |
542 ab |
7707 ab |
7.0 c |
172 b |
2972 ab |
| 75% N + Inoculated with A. brasilense + CM-RT1 (0.1 mL L–1) | 12.9 a | 458 a | 6561 a | 29.5 a | 669 a | 8113 a | 7.9 bc | 199 b | 3322 a |
1 0.1 and 1.0 mL L–1 correspond to approximately 10–9 and 10–8 M of active compounds, respectively.
2 Data represent the means of six replicates and when followed by different letters within the same column are significantly different (p ≤ 0.05, Duncan’s test).
All plants received 24 kg of N ha-1 at sowing and 0, 75 or 100% of N (90 kg of N ha-1) at 30 days after emergence, broadcasted. Experiment performed in three field sites in Brazil.