Browsing by Subject "Rubus"
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Item Accessions from University of Minnesota Fruit Breeding Program 1923-1950: Accessions N231 to N50174(1950) Horticultural Research CenterItem Accessions from University of Minnesota Fruit Breeding Program 1951-1972: Accessions N511 to N72111(1972) Horticultural Research CenterItem Apple fruit cold storage trial data from 1950s and 1960s and performance of plum selections at Morden Manitoba in 1956(1963) Horticultural Research CenterItem Duplicate Pollination Records from University of Minnesota Fruit Breeding Program from 1923-1929(1929) Horticultural Research CenterItem Duplicate Pollination Records from University of Minnesota Fruit Breeding Program from 1930-1935(1935) Horticultural Research CenterItem Duplicate Pollination Records from University of Minnesota Fruit Breeding Program from 1936-1941(1941) Horticultural Research CenterItem Fire Affects Ecophysiology and Community Dynamics of Central Wisconsin Oak Forest Regeneration(1990) Reich, Peter B; Abrams, Marc D; Ellsworth, David S; Kruger, Eric L; Tabone, Tom JIn order to understand better the ecophysiological differences among competing species that might influence competitive interactions after, or in the absence of, fire, we examined the response to fire of four sympatric woody species found in intermediatesized gaps in a 30-yr-old mixed-oak forest in central Wisconsin. Selected blocks in the forest were burned in April 1987 by a low-intensity controlled surface fire. The fire had significant effects during the following growing season on community structure, foliar nutrient concentrations, and photosynthesis. Acer rubrum seedling density declined by 70% following the fire, while percent cover increased several-fold in Rubus allegheniensis. In general, leaf concentrations of N, P, and K were increased by the fire in all species, although the relative enhancement decreased as the growing season progressed. Daily maximum photosynthetic rates were 30-50% higher in burned than unburned sites for Prunus serotina, Quercus ellipsoidalis, and R. allegheniensis, but did not differ between treatments for A. rubrum. Mean sunlit photosynthetic rates and leaf conductances were stimulated by the burn for all species, with the greatest enhancement in photosynthesis measured in Q. ellipsoidalis. Leaf gas exchange in R. allegheniensis was most sensitive to declining leaf water potential and elevated vapor pressure gradient, with Q. ellipsoidalis the least sensitive. Fire had no discernable effect on water status of these plants during a year of relatively high rainfall. In comparison with other species, A. rubrum seedlings responded negatively after fire-both in terms of survival/reproduction (decline in the number of individuals) and relative leaf physiological performance. Fire enhanced the abundance of R. allegheniensis and the potential photosynthetic performance of R. allegheniensis, P. serotina, and particularly Q. ellipsoidalis. We conclude that post-fire stimulation of net photosynthesis and conductance was largely the result of enhanced leaf N concentrations in these species.Item Fruit descriptions and phenotype data for apple and plum selections. Date range: 1955-1966(1966) Horticultural Research CenterItem Maps of field plantings of fruit crops at the University of Minnesota Horticultural Research Center Farm 1 and Farm 2: 1939-1982(1982) Horticultural Research CenterItem Maps of field plantings of fruit crops at the University of Minnesota Horticultural Research Center Farm 1: 1921-1981(1981) Horticultural Research CenterItem Maps of field plantings of fruit crops at the University of Minnesota Horticultural Research Center Farm 1: 1968-1982(1982) Horticultural Research CenterItem Maps of field plantings of various fruit crops at the University of Minnesota Horticultural Research Center Farm 1: 1980-1983(1983) Horticultural Research CenterItem Original Pollination Records from University of Minnesota Fruit Breeding Program from 1923-1929(1929) Horticultural Research CenterItem Original Pollination Records from University of Minnesota Fruit Breeding Program from 1930-1934(1934) Horticultural Research CenterItem Original Pollination Records from University of Minnesota Fruit Breeding Program from 1935-1941(1941) Horticultural Research CenterItem Original Pollination Records from University of Minnesota Fruit Breeding Program from 1942-1949(1949) Horticultural Research CenterItem Performance and phenotype data for apple and Prunus selections(1965) Horticultural Research CenterItem Pollination record in University of Minnesota fruit breeding program from 1965 through 1985(1985) Horticultural Research Center