Open Access
Table 1.
The effect of diatomite and zeolite on crop yield (t/ha) and content of heavy metals in products (mg/kg in natural substance)
| Crop | Variant | Yield | Zn | Cu | Pb | Cd | Ni |
|---|---|---|---|---|---|---|---|
| Tomatoes (2000–2002) | Contol | 38.1 | 15.3 | 3.3 | 0.59 | 0.18 | 1.15 |
| Diatomite 5 t/ha | 43.0 | 14.4 | 2.2 | 0.09 | 0.12 | 1.00 | |
| Cucumbers under cover, (2005–2007) | Contol (turfy sub-strate) | 26.6* | 11.3 | 1.2 | 0.07 | 0.08 | 0.50 |
| Organic Soil 90% + Diato-mite 5 t/ha 10% | 35.1 | 5.9 | 0.5 | 0.01 | 0.04 | traces | |
| Carrots (production tests, area of 1 plot is 5 ha, 2002) | Contol | 13.2 | 10.9 | 3.5 | 0.12 | 0.09 | 1.19 |
| Diatomite 5 t/ha | 26.7 | 9.9 | 2.7 | 0.11 | 0.08 | 0.77 | |
| Spring wheat (2003–2005) | Contol | 1.58 | 8.3 | 1.5 | 0.30 | 0.06 | n/a |
| Diatomite 5 t/ha | 2.25 | 6.6 | 0.8 | 0.14 | 0.02 | n/a | |
| Barley (2003–2005) | Contol | 1.79 | 16.4 | 2.7 | 0.33 | 0.14 | n/a |
| Diatomite 5 t/ha | 2.72 | 11.0 | 1.9 | 0.15 | 0.07 | n/a | |
| Sugar beet–root (2007–2009) | Contol | 27.6 | 72 | 3.8 | 0.07 | 0.05 | 0.20 |
| Diatomite 5 t/ha | 34,0 | 6.7 | 3.1 | 0.06 | 0.04 | 0.17 | |
| Corn (2016–2017) | Contol | 5.90 | 9.8 | 3.1 | 0.41 | 0.09 | 1.50 |
| Zeolite 0.5 t/ha | 6.94 | 9.5 | 2.9 | 0.36 | 0.06 | 1.39 |
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