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Individual study: Eight years of seasonal burning and herbicidal brush control influence sapling longleaf pine growth, understory vegetation, and the outcome of an ensuing wildfire

Published source details

Haywood J.D. (2009) Eight years of seasonal burning and herbicidal brush control influence sapling longleaf pine growth, understory vegetation, and the outcome of an ensuing wildfire. Forest Ecology and Management, 258, 295-305


This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.

Use prescribed fire after tree planting Forest Conservation

A replicated, controlled study in 1998-2006 in temperate forest in Louisiana, USA (Haywood 2009) found that prescribed fire decreased the height and basal area of longleaf pine Pinus palustris saplings. Longleaf pine height (March burn: 7.7 m; May burn: 8.7 m; July burn: 8.6 m; control: 9.1 m) and basal area/tree (March burn: 72; May burn: 94; July burn: 92; control: 116 cm2) were lowest following a burn in March, intermediate and similar following burns in May and July and highest in control plots. Data were collected in 2006 in three plots (0.07 ha) of each treatment: a burn in March, May or July (prescribed burn in 1999, 2001, 2003 and 2005), and a control (untreated since 1998) treatments. Each of the 12 plots was planted with 196 longleaf pine seedlings in 1993-1994.

 

Use herbicides after tree planting Forest Conservation

A replicated, controlled study in 1998-2006 in temperate forest in Louisiana, USA (4) found no effect of herbicide treatment on the height and basal area of planted longleaf pine Pinus palustris trees. Total cover of  understory vegetation was lower in herbicide plots (herbicide: 21%; control 68%). In comparison, longleaf pine height (herbicide: 9.0 m; control 9.1 m) and basal area/tree (herbicide: 12,000 cm2; control 11,600 cm2) were similar between treatments. Data were collected in 2006 in three herbicide (application of triclopyr herbicide without intentionally treating herbaceous plants and vine in 1999, 2001, 2003, and 2005) and three control plots (untreated since 1998) of 0.066 ha. Each plots was planted with 196 longleaf pine seedlings in 1993-1994.

 

Use prescribed fire: effect on understory plants Forest Conservation

A replicated, controlled study in 1998-2006 in temperate forest in Louisiana, USA (Haywood 2009) found that prescribed fire decreased understory vegetation cover. The total cover of understory vegetation was lower in burned treatments than in unburned plots (burned: 58-62%; unburned 68%).  Data were collected in 2006 in three plots (0.07 ha) of each of March, May and July burns (prescribed burn in 1999, 2001, 2003, and 2005), and control (untreated since 1998) treatments. Each of the 12 plots was planted with 196 longleaf pine seedlings in 1993-1994.