Southern-pine silvopasture systems: Forage characteristics, soil quality, and landscape utilization cattle. by Uma Karki

ISBN: 9781109043723

Published:

NOOKstudy eTextbook

170 pages


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Southern-pine silvopasture systems: Forage characteristics, soil quality, and landscape utilization  by  cattle. by Uma Karki

Southern-pine silvopasture systems: Forage characteristics, soil quality, and landscape utilization by cattle. by Uma Karki
| NOOKstudy eTextbook | PDF, EPUB, FB2, DjVu, audiobook, mp3, RTF | 170 pages | ISBN: 9781109043723 | 7.38 Mb

Silvopasture is considered a more attractive land management option for diversified economic returns and environmental quality compared to open-pasture (pasture without trees) monocultures. However, little is known about temporal and spatial dynamicsMoreSilvopasture is considered a more attractive land management option for diversified economic returns and environmental quality compared to open-pasture (pasture without trees) monocultures.

However, little is known about temporal and spatial dynamics of pasture-plant species composition, forage productivity, and forage and soil quality as pasture-to-silvopasture conversion proceeds or the possible benefits silvopasture systems offer for improved forage and landscape utilization by grazing animals.

Major objectives of this research were to determine the influence of: (1) pasture type (silvopasture versus open-pasture) on forage and soil parameters, and the distribution and behavior of cattle- (2) N source (legume-N versus fertilizer-N) on forage and soil parameters- (3) forage species and soil pH level on soil quality parameters.-To quantify pasture-type and N-source effects, studies were conducted in a young (3-7 yr) longleaf pine (Pinus palustris)-bahiagrass (Paspalum notatum) silvopasture and open bahiagrass pasture at Americus, Georgia.

Pasture-plant species composition, biomass, and quality (2003-2007) and soil quality parameters (2005-2007, water stable aggregates, WSA- density of fungal hyphae, DFH- penetration resistance, PR) were evaluated. Legume-N (Trifolium incarnatum) and fertilizer-N treatments were applied to both pastures from 2005 to 2007. A second field study was conducted in a 20-yr old loblolly-pine (Pinus taeda) silvopasture and open-pasture at Chipley, Florida in 2007 to examine diurnal distribution and behavior of cattle (Bos taurus) and relationship to microclimate and forage characteristics.

Short-term (12-wk) impacts of forage species and pH level (field-state versus adjusted-pH) on soil quality (WSA and DFH) were studied in coastal plain soil microcosms under protected culture during three experimental periods: fall 2005 and summer and fall 2006.-Compared to open-pasture, young longleaf-pine silvopasture produced similar forage shoot dry matter with lower quality- lower levels of WSA and PR were detected in silvopasture.

Legumes improved forage productivity and forage and soil quality compared to fertilizer-N use. Cattle distribution was more even and grazing hours were longer in mature loblolly-pine silvopasture versus open-pasture. WSA levels in microcosm soil under subterranean clover ( Trifolium subterraneum) were greater than or equal to WSA levels in soils under other cool-season forages- the same relationship was observed for WSA levels in soil under Illinois bundleflower (Desmanthus illinoensis ) versus other warm-season legumes.

WSA and DFH levels were higher in field-state versus adjusted-pH soil.



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