Response of Slash Pine to Different Spacings and Site-Preparation Treatments

Sarigumba, T. I.; Anderson, G. A.

doi:10.1093/sjaf/3.3.91

Cited by 7 publications

(1 citation statement)

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“…), species in the Asteraceae family, legumes, and elms (Ulmus spp.). Site preparation applications are usually combined with mechanical bedding on poorly drained coastal soils because bedding is a standard operational practice to mediate depressional areas and improve control of planting spacing, planting quality, initial control of vegetation, and yield (Sarigumba and Anderson 1979;Shiver et al 1990). Lauer and Quicke (2006a) found that imazapyr treatments could be applied over a wide range of timings before or after bedding.…”

Section: Introductionmentioning

confidence: 99%

Harmonized site preparation and postplant herbaceous weed control for establishment of southern pine plantations on coastal bedded sites

Lauer

Quicke

2022

Weed Technol

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Loblolly or slash pine response and vegetation colonization are summarized for a region-wide study that included 5 locations on coastal soils in the Southern U.S. The objective was to evaluate timing of post-plant herbaceous weed control (HWC) treatments following pre-plant site preparation with imazapyr applied at two timings (August, November) and at three rates (0.56, 0.84, 1.12 kg ha−1). All imazapyr site preparation treatments were applied after bedding. Site preparation treatments resulted in fast growing stands without HWC at all locations with average year 3 dominant tree height ranging from 2.6 to 3.7 m. Imazapyr plus sulfometuron was an effective herbaceous weed control treatment on loblolly pine. Vegetation control and pine response varied by surface soil texture. On coarser textured soils the site preparation treatments resulted in <10% vegetation cover in June of the first pine growing season. On these coarser textured soils, loblolly pine growth was increased by second-year and not first-year HWC. On finer textured soils vegetation colonization was aggressive with >20% cover in June of the first pine growing season such that early first-year HWC provided the largest loblolly pine response of single pass HWC treatments. Pines were highly tolerant to imazapyr site preparation treatments as evidenced by the lack of differences in slash or loblolly pine survival and growth from the doubling of imazapyr rates for applications in either August or November. There was little meaningful residual control of herbaceous vegetation into the second pine growing season from site preparation treatments or first-year HWC regardless of location. There was no consistent pine response benefit from increasing imazapyr site preparation rate for included treatments. Cost-effective treatments would utilize low site preparation herbicide rates followed by the appropriate timing of HWC if longer-term vegetation control is the objective.

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Section: Introductionmentioning

confidence: 99%

Harmonized site preparation and postplant herbaceous weed control for establishment of southern pine plantations on coastal bedded sites

Lauer

Quicke

2022

Weed Technol

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Evidence for Long-Term Productivity Change as Provided by Field Trials

Morris

Miller

1994

Impacts of Forest Harvesting on Long-Term Site Productivity

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Planting slash pine in a dense pasture sod

Lewis

1985

Agroforest Syst

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Recommendations for planting pines usually include providing a competitionfree site to assure establishment and good early growth. When combining pines and pasture in agroforestry systems, the possibility of planting pines directly into a pasture sod without site treatment would be economically desirable. In south Georgia, USA, slash pine (Pinus elliottii) was planted into a pasture sod and on well-disked sites; both with and without annual fertilization. Partial weed control was maintained in subsequent years on the cultivated treatments and the pasture sod was mowed periodically.Slash pine establishment and growth rate through 5 years generally was not different among treatments. Survival was 96% initially and 86% after 5 years. The pines grew rapidly with no measurable advantage from cultivation or fertilization.This alternative to providing a competition-free environment needs to be tested under differing climates, soils, tree species, and pasture species. It could be a suitable technique in various situations and of special interest to small, nonindustrial landowners.

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Response of Slash Pine to Different Spacings and Site-Preparation Treatments

Cited by 7 publications

References 0 publications

Harmonized site preparation and postplant herbaceous weed control for establishment of southern pine plantations on coastal bedded sites

Harmonized site preparation and postplant herbaceous weed control for establishment of southern pine plantations on coastal bedded sites

Evidence for Long-Term Productivity Change as Provided by Field Trials

Planting slash pine in a dense pasture sod

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