Sulfometuron methyl influences seedling growth and leaf function of three conifer species

Robertson, N.; Davis, Anthony S.

doi:10.1007/s11056-011-9272-x

Cited by 4 publications

(2 citation statements)

References 28 publications

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“…While our photosynthesis rates measured were comparable with those reported in the literature [49,50], we did not observe a combined effect of vegetative competition × container volume, or container volume alone on the net photosynthesis measurements of either species. Although seedling stocktypes differed in initial size, their carbon allocation rates did not.…”

Section: Discussionsupporting

confidence: 88%

Stocktype and Vegetative Competition Influences on Pseudotsuga menziesii and Larix occidentalis Seedling Establishment

Pinto

McNassar²,

Kildisheva

et al. 2018

Forests

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Douglas fir (Pseudotsuga menziesii var. glauca (Mayr) Franco), and western larch (Larix occidentalis Nutt.) are species of ecological and commercial importance that occur throughout the Western United States. Effective reforestation of these species relies on successful seedling establishment, which is affected by planting stock quality, stocktype size, and site preparation techniques. This study examined the effects of container volume (80, 130, 200, and 250 cm 3) and vegetative competition on seedling survival and physiological and morphological responses for two years, post-outplanting. Glyphosate application (GS) and grass planting (HC) were used to achieve low and high levels of competition. For all measured attributes, the container volume × vegetative competition was not significant. Mortality was strongly influenced by competition, with higher mortality observed for Douglas fir and western larch planted in HC plots one (28% and 98%) and two (61% and 99%) years following outplanting. When competition was controlled, seedlings of both species exhibited greater net photosynthesis (>9 µmol m −2 s −1), greater predawn water potential (>−0.35 MPa), and lower mortality (2-3%) following one year in the field, indicating establishment success. The 80 cm 3 stocktype remained significantly smaller and exhibited lower growth rates for the duration of the study, while all other stocktypes were statistically similar. Our results demonstrate the importance of controlling vegetative competition regardless of stocktype, especially for western larch, and suggest that benefits to post-planting seedling physiology and growth in relation to container size plateau beyond 130 cm 3 among the investigated stocktypes.

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Section: Discussionsupporting

confidence: 88%

Stocktype and Vegetative Competition Influences on Pseudotsuga menziesii and Larix occidentalis Seedling Establishment

Pinto

McNassar²,

Kildisheva

et al. 2018

Forests

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“…Aminopyralid is toxic to conifers through uptake from soil (Kelpsas and Landgren 2016), and care is needed when considering use of aminopyralid for forestry applications, most particularly in evaluating the gap between time of application and time of planting. Similar consideration is due for observations of stunted seedling growth by residues of sulfometuron products (Robertson and Davis 2012). Although applications of hexazinone prior to planting decreased total cover for 2 and 3 years, greater mortality of larch plugs (but not bareroots) occurred (Lindsay 2011).…”

Section: Hooker Lower Sam Upper Sammentioning

confidence: 81%

Vegetation Control and Soil Moisture Depletion Related to Herbicide Treatments on Forest Plantations in Northeastern Oregon

Cole¹,

Lindsay

Newton

et al. 2018

Weed Technol

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Reforestation in the Inland Northwest, including northeastern Oregon, USA, is often limited by a dry climate and soil moisture availability during the summer months. Reduction of competing vegetative cover in forest plantations is a common method for retaining available soil moisture. Several spring and summer site preparation (applied prior to planting) herbicide treatments were evaluated to determine their efficacy in reducing competing cover, thus retaining soil moisture, on three sites in northeastern Oregon. Results varied by site, year, and season of application. In general, sulfometuron (0.14 kg ai ha–1 alone and in various mixtures), imazapyr (0.42 ae kg ha–1), and hexazinone (1.68 kg ai ha–1) resulted in 3 to 17% cover of forbs and grasses in the first-year when applied in spring. Sulfometuron+glyphosate (2.2 kg ha–1) consistently reduced grasses and forbs for the first year when applied in summer, but forbs recovered in the second year on two of three sites. Aminopyralid (0.12 kg ae ha–1)+sulfometuron applied in summer also led to comparable control of forb cover. In the second year after treatment, forb cover in treated plots was similar to levels in nontreated plots, and some species of forbs had increased relative to nontreated plots. Imazapyr (0.21 and 0.42 kg ha–1) at either rate, spring or summer 2007, or at lower rate (0.14 kg ha–1) with glyphosate in summer, provided the best control of shrubs, of which snowberry was the dominant species. Total vegetative cover was similar across all treatments seven and eight years after application, and differences in vegetation were related to site rather than treatment. In the first year after treatment, rates of soil moisture depletion in the 0- to 23-cm depth were correlated with vegetative cover, particularly late season soil moisture, suggesting increased water availability for tree seedling growth.

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Sheep vegetation management for controlling competing vegetation in young conifer plantations in the central interior of British Columbia, Canada

2014

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Sulfometuron methyl influences seedling growth and leaf function of three conifer species

Cited by 4 publications

References 28 publications

Stocktype and Vegetative Competition Influences on Pseudotsuga menziesii and Larix occidentalis Seedling Establishment

Stocktype and Vegetative Competition Influences on Pseudotsuga menziesii and Larix occidentalis Seedling Establishment

Vegetation Control and Soil Moisture Depletion Related to Herbicide Treatments on Forest Plantations in Northeastern Oregon

Sheep vegetation management for controlling competing vegetation in young conifer plantations in the central interior of British Columbia, Canada

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