Managing Global Resources for a Secure Future

2017 Annual Meeting | Oct. 22-25 | Tampa, FL

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335-1 Grazing Management Effect on Carbon and Nitrogen in Rangelands.

See more from this Division: C06 Forage and Grazinglands
See more from this Session: Symposium--Building Soil Organic Matter and Improving Soil Function in Grazing Lands

Wednesday, October 25, 2017: 8:05 AM
Tampa Convention Center, Room 19

Martha Mamo, 279 Plant Science, University of Nebraska - Lincoln, Lincoln, NE, Walter Schacht, Agronomy and Horticulture, University of Nebraska-Lincoln, Lincoln, NE, Anita Wingeyer, Grupo Recursos Naturales y Factores Abióticos, National Institute of Agriculture Technology, Oro Verde, Argentina, Jerry Volesky, West Central Research & Extension Center, Univ. of Nebraska-Lincoln, North Platte, NE, Haishun Yang, Agronomy and Horticulture, University of Nebraska - Lincoln, Lincoln, NE, Jeffrey Bradshaw, University of Nebraska - Lincoln, Scottsbluff, NE, Pamela J Sutton, University of Nebraska - Lincoln, Lincoln, NE and John A. Guretzky, Agronomy & Horticulture, University of Nebraska - Lincoln, Lincoln, NE
Abstract:
There are many interacting factors affecting nutrient cycling in grazing system. The overall goal of the project is to evaluate physical and biological processes affecting the transport, transformations, losses, and storage of N and C pulses induced by grazing. These pulses can include urine, dung, litter, and trampled vegetation and maybe influenced spatially and temporally by the grazing strategy. The study was conducted at the Barta Brothers Ranch in the meadows of the Sandhills region of Nebraska. The treatments included ultra-high stocking density grazing, low stocking density grazing, haying, and control with no grazing. Soil samples were taken annually for the last seven years to evaluate changes in bulk soil C and POC fractions. In addition, dung decomposition, and soil nutrient changes from dung pats were measured. We will report the nutrient cycling model of this grazed system as well as report on the temporal changes in soil C.


See more from this Division: C06 Forage and Grazinglands
See more from this Session: Symposium--Building Soil Organic Matter and Improving Soil Function in Grazing Lands

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