Seeding Rate and First-Year Stand Relationships for Six Native Grasses

Launchbaugh, J. L.; Owensby, Clenton E.

doi:10.2307/3896311

Cited by 41 publications

(37 citation statements)

References 4 publications

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“…Launchbaugh and Owensby (1969) and Casler et al (1999) reported that increased seeding rates of desirable plant species decreased the percentage of establishment. The apparent contradiction could be the result of functional dissimilarities between desirable plant species and invaders, such as earlier phenology of medusahead, or site differences.…”

Section: Discussionmentioning

confidence: 99%

Medusahead Dispersal and Establishment in Sagebrush Steppe Plant Communities

Davies

2008

Rangeland Ecology & Management

112

109

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Section: Discussionmentioning

confidence: 99%

Medusahead Dispersal and Establishment in Sagebrush Steppe Plant Communities

Davies

2008

Rangeland Ecology & Management

112

109

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“…A fi eld plot consisted of plants transplanted on 0.3-m centers in a 4 by 8 arrangement. This plant density has been demonstrated to be an adequate sward stand for switchgrass grown as either a pasture or biomass crop in research spanning several decades (Launchbaugh and Owensby, 1970;Vogel, 1987;Schmer et al, 2006). This stand density also is supported by the comprehensive ecological studies of Weaver (1968), which spanned a 50-yr period.…”

Section: Methodsmentioning

confidence: 99%

Heterosis in Switchgrass: Biomass Yield in Swards

2008

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Improving the biomass yield of switchgrass (Panicum virgatum L.) will improve its utility as a dedicated energy crop by increasing both its net and total energy yield per hectare. In a previous space‐transplanted study, midparent heterosis for biomass yield was reported for population and specific F1 hybrids of the lowland‐tetraploid cultivar Kanlow and the upland‐tetraploid cultivar Summer. These two cultivars were proposed to be two different heterotic groups. The objective of this study was to determine the extent of heterosis for biomass yield in reciprocal Kanlow (K) and Summer (S) F1 population hybrids grown in simulated swards and to determine the effect of advance in generation on biomass yield. Parent populations and their F1, F2, and F3 population hybrids were grown in transplanted sward plots located near Mead, NE, for a three‐year period. Plant density in the simulated swards was equivalent to acceptable stands in seeded plots. Plots were not harvested the establishment year to enable them to become fully established. Biomass yields were determined for the following two years. There was significant high‐parent heterosis of 30 to 38% (P ≤ 0.01) for biomass yield for both the K × S F1 and S × K F1 hybrid populations. Heterosis for biomass yield declined with advance in generation. Heterosis for biomass yield in switchgrass may need the competitive conditions of swards to be fully expressed. Additional trials of specific hybrids established from seed are needed to further verify these conclusions. These results do provide ample justification for additional research to develop switchgrass population and specific hybrids.

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“…Contrary to the accepted practice of spring seeding for rough fescue (Pahl and Smreciu, 1999), our analysis showed that F. campestris succeeded better with late season seeding, i.e., late summer or fall, The literature contains little consensus regarding seeding rates for native species. Recommended seeding rates range from 4 to 8 kg/ha (240e480 seeds/ m 2 ) for rough fescue in Alberta (Pahl and Smreciu,1999), up to 500 kg/ ha (12,500 seeds/m 2 ) for intermediate wheatgrass to improve competition with weedy species in Montana (Sheley et al, 2005), or 48 kg/ha (1160 seeds/m 2 ) for western wheatgrass establishment in Kansas (Launchbaugh and Owensby, 1970).…”

Section: Pipeline Construction Effectsmentioning

confidence: 99%