Hemp as a raw material for industrial applications

Developed countries need to promote alternatives to crops produced in excess (such as cereals), and cultivation with limited environmental impact. Hemp (Cannabis sativa L.) is a potentially profitable crop, fitting into sustainable farming systems. Interest in new fibre crops is in fact increasing, to find alternatives to a high-input crop such as cotton, or to relieve the pressure of the paper industry on remaining natural forests. Besides, innovative applications are provided by hemp in renewable raw materials (oils from seeds and essential oils or secondary metabolites from inflorescences for food, cosmetic or pharmaceutical industry; straw and hurds for the building industry and for energy production). The development of more specialized hemp plants,. needs a better understanding and control of metabolism. Since the renewed interest for this crop is increasing all over the World, it is important to update the knowledge on this crop, to understand whether it is a really sustainable, alternative and economically rewarding crop, and what contribution plant breeding, agronomical practice, and processing techniques are making, or could further make, to improve the relevant traits. The symposium Hemp: perspectives for advanced utilization, held in Bologna (Italy) on March 2004, was an opportunity to update the research carried out in different fields.