Seeds crop time is crucial on the seeds preservation. If harvested at maturity stage with satisfactory levels of germination and vigor, than the seed have reached its top quality and it’s good to be stored.
On seed conservation policies, the problem lies on deterioration over time, hence seeds are subject of a natural process of degradation.
There are three core conditions on storage seeds preservation:
- Package atmosphere
Oxygen-free is critical to avoid oxidation. Air should be removed by vacuum until a concentration of 4 to 8% of oxygen inside.
High temperature promotes biological activity, while extremely high temperature (50 degrees C) can eradicate a bug danger, but it will most certainly spoil the commodity. On the other hand, lower temperature postpone the biological activity, and at extreme values (-20 degrees C) will kill any infestation.
- Relative humidity (RH)
Generic nutritional tables states that seeds already contains an average of 10% moisture. The correct controlled atmosphere CA approach will tolerate 8% of moisture content, so that no events of condensation or germination might occur.
The threats on seeds’ preservation are as followed:
- both high humidity and temperature
- contact to water, that causes direct damage and increases mould fungal attack
- insects and pests (birds and rodents) causing direct damage and spillage
- cross contamination from fertilizers, chemicals and toxic materials
So, conservation of seeds will cover the natural time gap between seed harvest and sowing, will carry over unsold stock from season to season and will provide buffer stocks to meet fluctuations in demand.
Cold rooms have been an option, but that requires heavy investment on facilities and has high energy costs. VacQPack solution uses the temperature as an weapon, meaning that even the highest natural storage temperatures are welcomed.