Effect of defoliation intensity on regrowth of tallgrass prairie
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Authors: K. W. Tate, R. L. Gillen, R. D. Mitchell, and R. L. Stevens
Date: 1994
Journal: Journal of Range Management
Volume: 47
Number: 1
Pages: 38-42
Summary of Methods: In this study authors estimated the rate of live herbage accumulation based on residual herbage remaining immediately after grazing in a short-duration (1-2 days) system, over the growing season. The rate of regrowth significantly declined as the season progressed, becoming insignificant or very limited in August. Residual herbage levels (i.e. grazing intensity) were significantly related to regrowth rate only at one of the two replicate sites (weather conditions could not explain the difference between sites). Despite a good fit to a curve-linear regression model (74-81% of variation accounted for), defoliation intensity across season could not explain all complex interactions in regrowth and recovery of tallgrass prairie in south-central Oklahoma.
Article Summary / Main Points: None
Vegetation Types:
MLRA Ecoregions:
Agrovoc Control Words: Riparian zones Rangelands Wildlife
Article Review Type: Refereed
Article Type: Experimental Research
Keywords: live herbage accumulation rate, residual herbage level, regrowth, timing, regression
Annotation: Study year growing season precipitation was much higher than average. Stocking densities were 7,600, 15,200, 22,700 and 30,300 kg animal weight ha-1 (to achieve different residual herbage after grazing). Paddocks were moderately grazed between trials. A 1-2 day grazing period on 8 treatment paddocks began May 26 (Trial 1), July 7 (Trial 2), and August 18 (Trial 3) of each year.
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