BIOSOLIDS APPLICATION AFFECTS AN OVERGRAZED RANGELAND
Biosolids beneficial-use programs effectively recycle plant nutrients when biosolids are applied at agronomic rates. Determining such rates to overgrazed western US rangelands can be challenging in terms of applying adequate plant N, increasing biomass production and species diversity, and improving soil quality. New York City biosolids were applied once to an overgrazed rangeland near Lamar, Colorado on 80 acre plots at rates of 0, an “agronomic rate” (1–2), 5, 10, and 20 dry tons per acre to determine the effects on biomass production, protein and nutrient content, species enrichment, and soil nutrient/trace metal content, and water infiltration rates. Biosolids were applied in 1999. Plant samples were obtained in 2000 through 2005. Soil samples were obtained in 2003 and analyzed for AB-DTPA extractable trace metals. Biomass increased with increasing biosolids application up to 10 dry tons per acre, after which biomass decreased. The number of species present, plant protein, P, Zn, Cu, and Mn content increased with increasing biosolids rate. Phosphorus, Zn, and Mn concentrations were below the maximum tolerable levels for domestic livestock dietary intact; plant Cu content in 2000, 2001, and 2003 were above these levels for cattle and sheep. However, plant Cu content tended to decrease with time. Soil AB-DTPA extractable metal concentrations were all near or below detection limits. Results validate research findings from several institutions.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
Document Type: Research Article
Publication date: 2007-01-01
More about this publication?
- Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed. A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.
WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
- Subscribe to this Title
- Membership Information
- About WEF Proceedings
- WEFTEC Conference Information
- Learn about the many other WEF member benefits and join today
- Ingenta Connect is not responsible for the content or availability of external websites