Get reliable rangeland science

Trampling and Cover Effects on Soil Compaction and Seedling Establishment in Reseeded Pasturelands Over Time
Author
Vanderburg, K.L.
Steffens, T.J.
Lust, D.G.
Rhoades, M.B.
Blaser, B.C.
Peters, K.
Ham, M.J.
Publisher
Elsevier Inc.
Publication Year
2020-05
Body

A field study in Randall County, Texas, was conducted to determine how soil bulk density and plant cover change over time in response to deferment following a high-density, high-intensity, short-term grazing/trampling event. Green Sprangletop (Leptocloa dubia Kunth.) and Kleingrass (Panicum coloratum L.) were broadcasted at 4.5 kg ha−1 pure live seed (PLS) on former cropland that had a partial stand of WW-Spar Bluestem (Bothriochloa ischaemum L.). A high-density, high-intensity trampling event was achieved with twenty-four 408-kg Bos taurus heifers occupying four 0.10-ha plots (97 920 kg live weight ha−1) for 10 h, with four adjacent 0.10-ha control plots left untrampled. Canopy and basal cover were determined by plant functional group using the Daubenmire method after rainfall events of > 0.254 cm, and a 5.08 × 7.62 cm core was collected to determine soil bulk density. Strips of supplemental plant material were applied in March to test the effects of 100% soil cover on seedling recruitment. Trampled treatments had 30% less vegetative cover (P < 0.01) and average soil bulk densities that were 0.20 g cm−³ higher (P < 0.01) than untrampled plots post trampling. Bulk density decreased with deferral until there were no significant differences between treatments (240 d). However, WW-Spar basal cover increased in both treatments, with no differences between treatments. Trampling did not affect seedling recruitment, but supplemental cover increased seedling density on three of five subsequent sampling dates (P < 0.05). Canopy cover of warm season perennial grasses in trampled treatments surpassed that of the untrampled treatments during the early growing season of 2016 (P < 0.01) but were no different after mid-June. Hydrologic function can be maintained with high stock densities by providing adequate deferment to reestablish sufficient cover and allow natural processes to restore porosity. © 2020

Language
en
Resource Type
Text
Document Type
Journal Issue/Article
Digital Object Identifier (DOI)
10.1016/j.rama.2020.01.001
Additional Information
Kathryn L. Vanderburg, Tim J. Steffens, David G. Lust, Marty B. Rhoades, Brock C. Blaser, Kim Peters, and Matthew J. Ham "Trampling and Cover Effects on Soil Compaction and Seedling Establishment in Reseeded Pasturelands Over Time," Rangeland Ecology and Management 73(3), 452-461, (22 May 2020). https://doi.org/10.1016/j.rama.2020.01.001
ISSN
1550-7424
OAI Identifier
oai:repository.arizona.edu:10150/679527
Journal Volume
73
Journal Number
3
Journal Pages
452-461
Collection
Rangeland Ecology & Management (REM)
Journal Name
Rangeland Ecology and Management
Keywords
adaptive multipaddock grazing
bulk density
grazing deferment
high-intensity trampling
rotational grazing
soil compaction
agricultural land
bulk density
dicotyledon
functional group
grass
growing season
pasture
rainfall
seedling establishment
Soil Cover
vegetation cover
Randall County
Texas
United States
Bos taurus
Bothriochloa ischaemum
Panicum coloratum
Poaceae