01 Jun 2015
Breaking yield barriers in soybean: Preliminary results of the first year of experimentation at Oliveros - Argentina
Poster presentation at the 2015 Fertility Symposium
![](http://media.ipni.net/image/IPNI2015FGA02-1235-P.jpg)
The field study has been established on November 2014 at the Experimental Station of INTA at Oliveros (Santa Fe, Argentina) (Table 1). The factors under study are: soybean maturity group, row spacing, planting date, and nutrient management (inoculation, P rate and time, S rate, B and Zn rates, N rate, placement, and time).
Table 1. Treatments at the EEA INTA Oliveros site. Argentina, 2014/15 season.
![]() | Treatment | |||
Famer Practices (FP) | Comprehensive Fertilization (CF) | Production Intensity (PI) | Ecological Intensification (CF+ PI) | |
Seed Treatment | Fungicide + Insecticide | |||
Herbicide management | PRE + POST | |||
Agronomic management | ||||
Soybean maturity | DM 4970 | DM 4970 | LDC 4.7 | LDC 4.7 |
Row Spacing | 52 | 52 | 26 | 26 |
Fungicide Application | Yes | |||
Planting date | 28 Nov | 28 Nov | 7 Nov | 7 Nov |
Target seeding rate (seeds/ha) | 290,000 | 290.000 | 440,000 | 440,000 |
Nutrient management | Standard | Advanced | Standard | Advanced |
Inoculation | None | Single rate + PGR | None | Single rate + PGR |
P (STP) in 2 x2 at seeding | NO | 20 kg P ha-1 | NO | 20 kg P ha-1 |
P strategy | Without P | Broadcasted on July 2014 | Without P | Broadcasted on July 2014 |
Sulfur | NO | 20 kg S ha-1 (Gypsum) | NO | 20 kg S ha-1 (Gypsum) |
Micros (B + Zn + Mn) | 0 | B, foliar at R2-3 | 0 | B, foliar at R2-3 |
Reproductive N (R4-5) | 0 | 50 | 0 | 50 |
- Biological N fixation will be determined using the 15N abundance method.
- “Rescue” irrigation was not needed.
Plots were harvested on mid-April, preliminary data is shown in Table 2.
Table 2. Grain yield, seed weight and seeds per m2 for the four treatments evaluated at Oliveros (Santa Fe, Argentina). 2014/15 season.
![]() | Farmer
Practices (FP) | Comprehensive Fertilization (CF) | Production Intensity (PI) | Ecological Intensification (CF+ PI) |
Grain yield (kg/ha) | 5199 | 5491 | 5291 | 5495 |
Grain weight (g/1000 grains) | 180.4 | 190.8 | 161.8 | 165.3 |
Grains per m2 | 2880.6 | 2878.5 | 3269.9 | 3322.8 |
- On average, the four agronomic management and fertilization strategies yielded higher than 5200 kg ha-1, there were no significant differences among treatments or interaction effects of management practices and fertilization strategies.
- Intensive management (average of PI and CF+PI) increased the number of grains per m-2 respect to standard management (average of FP and CF) (P <0.01) by 14.5%. Nutritional management had no significant effect (P> 0.60) in this component.
- Grain weight increased by 4% in response to intensive fertilization (average of CF and CF+PI) compared to standard nutrient management (average of FP and PI) (P <0.04). However, standard practices (average of FP and CF) increased individual grain weight by 13.5% compared to intensive management (average of PI and CF+PI) (P <0.001).
- In summary, increases of 14% in the number of grains per effect of intensive management practices were offset by an increase of 13.5% in grain weight in the standard management. Comprehensive fertilization tended to increase grain yields but these increases were not statistically significant (+204 to 292 kg/ha).
Additional Resources
Poster Soybean Systems 2015 - FINAL.pdfSize: 0.34 MB