Rice husk is a unique raw material we use in new substrates. Rice husk is the hull that surrounds grains of rice and is a by-product, which we reuse in a sustainable way in our substrate blends. The rice husk used under the RHP quality label comes from Italy and has been sterilised during processing.
Rice husks are a rich source of silicon, which contributes to good crop resilience. Rice husks considerably aerate the structure of peat-rich substrates thanks to the specific shape of the husks that form cavities in the mixture. Rice husks also reduce shrinkage in substrates that contain peat. They are a relatively fresh organic material and nitrogen is bound temporarily during the process of degradation. This should be taken into account in the fertilisation strategy. Rice husks are rich in silicon and should not be applied in crops that are sensitive to this.
Insight into sustainability and eco-footprint
The themes of sustainability and environmentally-conscious cultivation are gaining traction throughout the horticultural sector. To support growers in this transition, all our substrates are categorised into a sustainability class. This class gives our customers continuous insight into the sustainability and circularity of a substrate and the corresponding properties. This classification system not only aims to offer CO2 and peat-free substrates, it also examines the origin and type of organic raw materials and fertilisers.
Four different classes are used: A, B, C and D. The sustainability class of a substrate is determined based on a set of pre-defined standards. By taking these criteria into account when formulating a substrate blend, we can produce a product with the desired sustainability class.
The table below shows the different classes and the applicable criteria ranging from the peat percentage to increasing use of circular raw materials.
A Class
- 100% Peat free
- At least 50% green raw materials
- Maximum 35% mineral raw materials
- No inorganic fertilizers
CO2 Footprint Class A
(<60kg eq/ENm3)
B Class
- 100% Peat free
- At least 15% green raw materials
- Maximum 35% mineral raw materials
CO2 Footprint Class B
(<60kg eq/ENm3)
C Class
- Maximum 65% peat
- Exclusively RPP peat
CO2 Footprint Class C
(50-150kg eq/ENm3)
D Class
- More than 65% peat (unlimited)
- Exclusively RPP peat
CO2 Footprint Class D
(70-350kg eq/ENm3)
Discover more about our sustainability classes? Go to values > Sustainability or contact us.
Contact us!
Are you eager to discover all the benefits we can offer your crops? We are happy to advise you! Or do you believe in the importance of sustainability and want to make your own contribution? Let us help you. Contact one of our specialists at +31(0) 88 22 44 800 or sales@lensli.com.
View our other raw materials
