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UNH receives $380,000 grant to study organic dairy as closed ecosystem
Date:6/3/2008

DURHAM, N.H. -- University of New Hampshire researchers have received a significant grant to study UNH's organic dairy research farm as a sustainable closed agroecosystem, exploring viable strategies for becoming energy independent. The $380,000 three-year grant, from the U.S. Department of Agriculture's Sustainable Agricultural Research and Education (SARE) program, aims to explore whether closing energy and nutrient cycles could help small family dairy farms in the Northeast survive economic vulnerabilities.

The study comes as rising energy, feed and capital investment costs shrink the already narrow profit margin of dairy agriculture in the Northeast, threatening the regional sustainability of the industry. "In a closed system, the only thing leaving the farm is the milk," says John Aber, professor of natural resources at UNH and the principal investigator on the grant. "The goal is to see whether we can have a closed-nutrient-cycle and energy-independent organic dairy."

In a closed system, for instance, cow manure fertilizes the fields on which the herd grazes. Sawdust from woodlands on UNH's 300-acre farm in Lee might be utilized for animal bedding, which is becoming increasingly expensive; woodlands might also provide fuel for small cogeneration plants. Methane digestion could produce usable methane from manure.

The first step for Aber, his faculty co-investigators, and UNH students who are working on the project is to assess energy and nitrogen budgets and balances. Nitrogen, he says, is the nutrient more critical to plant growth in the Northeast than any other; it comes from rainfall but can also be replaced by legumes like soybeans or clover. "If you want to maximize dairy production and dairy output, you need to replace the nitrogen leaving the farm in milk," he adds. In the second and third years of the grant, the researchers will look at alternative ways to close the energy and nutrient cycles.

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Contact: Beth Potier
beth.potier@unh.edu
603-862-1566
University of New Hampshire
Source:Eurekalert  

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UNH receives $380,000 grant to study organic dairy as closed ecosystem
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