Native plant containers for restoration projects

Landis, Thomas D.; Steinfeld, David; Dumroese, R. Kasten

doi:10.2979/npj.2010.11.3.341

Cited by 14 publications

(7 citation statements)

References 6 publications

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“…Plants that are already blooming with established root systems will also have higher potential to self-seed and proliferate by rhizomes within the first year. Container choice is a function of target seedling specifications and production logistics (Landis et al, 2010). Not only were firm plugs of the two milkweed species propagated from seeds across a range of container volumes by manipulating fertilizer rate, but outplanting survival rates were high (>90%), regardless of species or treatment.…”

Section: Container Zmentioning

confidence: 99%

Growth and Survival of Two Western Milkweed Species: Effects of Container Volume and Fertilizer Rate

Hanson¹,

Ross‐Davis²,

Davis³

2017

hortte

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Diminishing milkweed (Asclepias sp.) populations are contributing to the conspicuous decline of the iconic monarch butterfly (Danaus plexippus). This research sought to improve milkweed propagation success, a core component of summer habitat restoration projects. Specifically, this research assessed the effects of container volume and fertilizer application rate on growth and first year field survival of two species of milkweed common to western North America, namely showy milkweed (A. speciosa) and narrowleaf milkweed (A. fascicularis). Generally, larger roots and shoots developed when plants were given the high rate of fertilizer (6.5 g·L−1) and when reared in the largest containers (2600 mL). For narrowleaf milkweed, nearly all plants developed a firm plug (i.e., one in which the root system remained intact when removed from the container) after 22 weeks. Most narrowleaf milkweed plants flowered 15 weeks after sowing when grown in the largest container with either the low (2.7 g·L−1) or high fertilizer rate or the midsized container (444 mL) with a high rate of fertilizer. For showy milkweed, a firm plug developed for nearly all individuals by the end of the growing season only when given the high fertilizer rate. None of the showy milkweed plants developed an inflorescence by 15 weeks. Results of this research improve our understanding of milkweed propagation and will aid in the efforts to restore the monarch butterfly’s summer breeding habitat by providing propagation protocols across a range of stocktypes.

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Section: Container Zmentioning

confidence: 99%

Growth and Survival of Two Western Milkweed Species: Effects of Container Volume and Fertilizer Rate

Hanson¹,

Ross‐Davis²,

Davis³

2017

hortte

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“…This concern reached an apex about 35 years ago when early versions of containers combined with emerging nursery practices were found to yield seedlings, especially pine, having poor root egress after outplanting; these seedlings subsequently had poor stability and were prone to toppling (Burdett et al 1986). Since then, most stability problems have been mitigated by a variety of container modifications, including vertical ribs, air-slits and copper-coatings, in concert with improved seedling culture during nursery production and use of appropriate planting tools (Landis et al 2010). Specifically for copper-coatings, numerous studies across a wide variety of copper sources, substrates, nursery conditions, and species generally arrive at the same conclusion: coating containers with copper arrests lateral root elongation, preventing roots from deflecting at the container interface and growing basipetally (e.g.…”

Section: Introductionmentioning

confidence: 99%

Morphology, gas exchange, and chlorophyll content of longleaf pine seedlings in response to rooting volume, copper root pruning, and nitrogen supply in a container nursery

et al. 2013

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Few pine species develop a seedling grass stage; this growth phase, characterized by strong, carrot-like taproots and a stem-less nature, poses unique challenges during nursery production. Fertilization levels beyond optimum could result in excessive diameter growth that reduces seedling quality as measured by the root bound index (RBI). We grew longleaf pine (Pinus palustris), a grass stage species, in containers of four different volumes (60-336 ml) either coated with copper oxychloride or left untreated and fertilized at low, medium, or high levels of nitrogen (N). In general, N concentration of tissues rose as N rate increased, with larger changes in concentration occurring between low and medium levels than between medium and high levels. N rate influenced root tissue N concentration less than it did stems and needles. Subtle needle color differences caused by N rate were significant, suggesting its potential utility during nursery production. As expected, seedlings grew larger as container volume increased and as N rate increased. Copper treatment, which we posited could influence the RBI, tended to increase root-collar diameter and tap root biomass and decrease total root volume. Chlorophyll abundance was affected more by N rate than by container volume or copper treatment, but photosynthesis was affected more by copper treatment than N rate or container size. Although RBI was 25 % greater for seedlings grown in small containers with high N rates than those grown in large containers with low N rates, RBI ranged only from 11 to 15 %, well below the critical 27 % threshold.

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“…Using copper-treated containers increases production costs without increasing static stability or seedling sales. When purchasing Cu-treated polystyrene-foam containers, the initial cost may be 20% more than untreated containers (Landis et al 2010). Replacement costs are greater since the longevity of polystyrene-trays is less than hard-plastic containers.…”

Section: Coppermentioning

confidence: 99%

Questions about toppling of pine seedlings

South

2022

REFOR

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When soil is moist and wind is at a gale force, the term used to describe blow down of old trees is windthrow. In contrast, toppling is a term used when planted pines lean more than 15° during the first decade after transplanting. Pines tend to topple more than other conifers and fast-growing species topple more than slow growing genotypes. Large areas of pine plantations have toppled before age 8 years. This paper describes some toppling events that have occurred in 18 countries and includes 16 questions about toppling.

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Native plant containers for restoration projects

Cited by 14 publications

References 6 publications

Growth and Survival of Two Western Milkweed Species: Effects of Container Volume and Fertilizer Rate

Growth and Survival of Two Western Milkweed Species: Effects of Container Volume and Fertilizer Rate

Morphology, gas exchange, and chlorophyll content of longleaf pine seedlings in response to rooting volume, copper root pruning, and nitrogen supply in a container nursery

Questions about toppling of pine seedlings

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