ATTRA is the national sustainable agriculture information service operated by the National Center for
Appropriate Technology under a grant from the Rural Business-Cooperative Service, U.
S.
Department
of Agriculture.
These organizations do not recommend...
More
ATTRA is the national sustainable agriculture information service operated by the National Center for
Appropriate Technology under a grant from the Rural Business-Cooperative Service, U.
S.
Department
of Agriculture.
These organizations do not recommend or endorse products, companies, or individuals.
ATTRA is headquartered in Fayetteville, Arkansas (P.
O.
Box 3657, Fayetteville, AR 72702), with
offices in Butte, Montana and Davis, California.
By Steve Diver
NCAT Agriculture Specialist
April 2002
ROOT ZONE HEATING FOR
GREENHOUSE CROPS
Root-zone heating is a greenhouse production method that focuses on an optimum root temperature by distributing heat to bench and floor growing systems.
It is an appropriate technology in the
sense that it promotes energy conservation in modern greenhouse production.
To warm roots, hot
water is distributed through EPDM rubber tubing (also known as hydronic thermal tubing) or PVC
piping laid out in a looping pattern.
Though modern greenhouses typica
Less
