Grafting is a well-known technique that enables to combine the best of two worlds in tomato production. In grafting, a strong and resilient rootstock to support the water and nutrient uptake and a scion (the top part) that promises to give the wanted growth and quality in terms of taste is used. In modern tomato-production in the Netherlands, practically all tomato plants are grafted. As growers have to put a notable effort in grafting, there must be a clear benefit in terms of an increased production compared to growing the tomato varieties on their own root system. In three subsequent experiments, the effect of grafting has been examined.
Experimental history
- Seed Sowing: 27 January 2019
- Grafting: 6 February 2019
- Transplanting: 26 February 2019
- Plant Density: 2.5 plants per m², every other stem doubled, so 3.75 stems/m²
- Harvesting Period: 5 May 2019 – 11 December 2019 (32 weeks)
- Number of Harvests: 57
This project aims to get hands-on experience and skills in grafting tomatoes and to test the benefits in terms of production and quality of grafted scions on strong rootstocks compared to their growth on their own root system
- Two different tomato rootstocks: Maxifort and Beaufort
- Two different tomato varieties: Tone Guitar and Forrester
Success rate of grafting: 90%; meaning that 10% of the plantlets did not recover well from the cutting and re-growing.
Grafted plants showed more resistance to Blossom End Rot (less occurrence), but still had a lower production level than the non-grafted tomatoes.
No significant difference between the applied rootstocks
In general, Tone Guitar performed better than Forrester.
| Low-Tech | Low-Tech (Soil) | Med-Tech (Diffused Glass) | Med-Tech (Clear Glass) | Hi-Tech | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Harvest kg/m2 | Good | Harvest kg/m2 | Good | Harvest kg/m2 | Good | Harvest kg/m2 | Good | Harvest kg/m2 | Good | |
| TG 1pl/pot | 56.88 | 84% | 65.81 | 96% | 58.35 | 94% | 61.83 | 92% | 54.15 | 92% |
| TG Beau | 58.26 | 85% | 68.74 | 94% | 66.27 | 88% | 58.75 | 85% | 54.45 | 93% |
| TG Uni | 61.33 | 88% | 60.66 | 94% | 60.55 | 91% | 55.75 | 85% | 54.82 | 93% |
| F 1pl/pot | 59.9 | 91% | 58.1 | 87% | 50.97 | 93% | ||||
| F Beau | 61.82 | 89% | 56.41 | 82% | 51.49 | 93% | ||||
| F Uni | 64.36 | 92% | 50.52 | 85% | 47.76 | 93% | ||||
