Gafsa, Tunisia (Februar 12, 2016) – The aim of the study is to evaluate the performance of ferti-activators Sanbio EPSOMIT and Sanbio PLANTA on the productivity of lettuce variety ´Iceberg´ in open-field production in Tunisia.
This project is being carried out as part of the cooperation between Sté SOCIETE PRIMEURS DE MEDITERRANÉEN „PRIMED“ – Tunisia, SGDAI General Society for Agricultural and Industrial Development – Tunisia and SANBOS GmbH – Germany.
1. Experimental procedure
Table 1: Overview of the treatment parameters
| Responsible organization | Sté SOCIETE PRIMEURS DE MEDITERRANÉEN „PRIMED“, 400 ha |
| Location | Gafsa, Tunisia  Figure 1. Map |
| Water supply | Drip irrigation and rain water |
| Experimental product | Sanbio EPSOMIT , Sanbio PLANTA |
| Dose and application | 1st application: 1 kg/ha Sanbio EPSOMIT in 500 L water/ha, foliar application 1 kg/ha Sanbio PLANTA in 500 L water/ha, ground application 2nd application: 1 kg/ha Sanbio EPSOMIT in 500 L water/ha, foliar application 1 kg/ha Sanbio PLANTA in 500 L water/ha, ground application |
| Seeding | 01/2017 |
| Application | 01/2017, BBCH 13-14, 3-4 leave stage |
| Harvest | 05/2017 |
Figure 2. Timeline of season
2. Results
Table 4: Productive performance
| Crop | Yield (t/ha) | Average weight per head (g) | Saleable lettuce % | |||
| Control | 27.3 | 600 | 65 | |||
| SANBIO mix | 31.85 | +16.67 | 650 | +8.34 | 70 | +5% |
Figure 3: Comparison of average yield (t/ha)
Figure 4: Comparison of average weight per head (g)
Figure 5: Comparison of saleable lettuce (%)
3. Photographs
Figure 6: Untreated plot
Figure 7: Plot treated with SANBIO mix
Figure 8: Lettuce from untreated plot
Figure 9: Lettuce from treated plot
Figure 9: Lettuce with loose filling from untreated plot
Figure 10: Lettuce with compact filling from plot treated with SANBIO mix
4. Conclusion
SANBIO product mix has shown very positive effects on plants and production.
A few weeks after the first and second application of Sanbio EPSOMIT and Sanbio PLANTA we found good vegetation, growth and vigor of plants in treated plot. After two applications of 2 kg of Sanbio EPSOMIT and 2kg Sanbio PLANTA in experimental lots we increased the production of lettuce +4.45t/ha (+16.677%) compared to control lot. Furthermore the average weight of head has increase at 50g (+8.34%) and finally the percentage of saleable lettuce has increased at 5% from 65% to 70%.