Vegetation Response of a Dry Mixed Prairie to a Single Spring or Fall Burn

Wang, Mingjun; Beck, Ryan; Willms, Walter D.; Hao, Xiying; Broadbent, Tanner

doi:10.1016/j.rama.2021.07.002

Cited by 4 publications

(2 citation statements)

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“…The response of the grasses was also strongly influenced by the occurrence of precipitation, especially in autumn, which suggests that the effects of fire would be more beneficial if burning is carried out at the end of summer, as proposed by Wang et al 16 . This gives the grasses a better chance to resume vigorous growth in the later spring in those grasslands that have autumn-winter-spring cycles.…”

Section: Discussionmentioning

confidence: 68%

“…Grazing, in fact, is a large scale disturbance and a driving force in these grasslands and as such it needs to be controlled. Wang et al 16 suggested that it would be desirable not to graze a burned site until a year after burning. In our case, the highest ANPP would be a direct consequence of the fire and climate, since none of the grasslands were being grazed, and the highest rainfall occurred during the first year.…”

Section: Discussionmentioning

confidence: 99%

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2023

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In the grasslands in the NE of Río Negro province, Argentina controlled burning or mechanical clearing are common practices to reduce the shrub layer and improve the forage supply of the grasslands that constitute the basis of extensive livestock breeding. In one area of the region, we estimated the Aerial Net Primary Productivity (ANPP) and evaluated the quality of the dominant grasses over three years in grasslands subjected to mechanical clearing and burning, through seasonal cuts of biomass and laboratory analysis. We also recorded the phenology of the dominant grasses and shrubs. We obtained higher values of Crude Protein and Dry Matter Digestibility of the grasses in spring, since they were mainly in the vegetative stage, and the differences were significantly greater in the burned site. This effect of fire would be due both to the regrowth and to the increase in the proportion of vegetative material generated by this disturbance. Mechanical clearing had no significant effects on quality, although it increased the ANPP. When analyzing phenological behavior, our results showed better conditions for livestock production in the disturbed sites, with a higher proportion of vegetative growth of the grasses and greater senescence of the shrubs.

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Section: Discussionmentioning

confidence: 68%

Section: Discussionmentioning

confidence: 99%