Estimation of symbiotic dinitrogen fixation in alder forest by the method based on natural15N abundance

Stable Nitrogen Isotopic Changes in Winter Wheat (<i>Triticum aestivum</i> L.) Induced by its Growth Temperature

“…Our result is similar with finding that plants under cold stress have low foliar δ 15 N values (Kohls et al, 1994). A study reported that the plants under slow growing rate have large nitrogen isotopic fractionation (Domenach et al, 1989). The metabolism of plants usually slows down in cold season and consequently, the nutrient uptake evidently decreases.…”

Stable Nitrogen Isotopic Changes in Winter Wheat (<i>Triticum aestivum</i> L.) Induced by its Growth Temperature

“…Our result is similar with finding that plants under cold stress have low foliar δ 15 N values (Kohls et al, 1994). A study reported that the plants under slow growing rate have large nitrogen isotopic fractionation (Domenach et al, 1989). The metabolism of plants usually slows down in cold season and consequently, the nutrient uptake evidently decreases.…”

Variation in Foliar 15N Abundance and the Availability of Soil Nitrogen on Walker Branch Watershed

“…Measurements of foliar o 15 N on Walker Branch Watershed, as well as those of another study (Domenach et al 1989), indicate that within-site variation in foliar 15 N abundance is small relative to differences between sites for non-N 2 -fixing tree species. Such patterns suggest that plant nitrogen isotope ratios are related to some property or properties of a site.…”

Contribution of actinorhizal shrubs to site fertility in a Northern California mixed pine forest

“…Similar to our results for mahala mat, they found substantial variation in foliar d 15 N and no significant differences in d 15 N between N-fixing and reference plants. In contrast, favorable results using the natural abundance method have been reported for a variety of crops (Bremer and van Kessel, 1990;George et al, 1993;Androsoff et al, 1995;Doughton et al, 1995;Ramos et al, 2001) and tree species (Shearer et al, 1983;Domenach et al, 1989;Ladha et al, 1993;Salas et al, 2001;Galiana et al, 2002). Common experimental conditions in these studies included: (1) a well-matched reference plant, or, when available, selection of several reference species to provide a range of %Ndfa; (2) growing N-fixing and reference plants in proximity to overcome inherent spatial variability in d 15 N; (3) plant-available d 15 N with an absolute value at least 4% greater than atmospheric d 15 N. These conditions were generally met for bitterbrush but not mahala mat at our study site.…”

Stable Nitrogen Isotopic Changes in Winter Wheat (<i>Triticum aestivum</i> L.) Induced by its Growth Temperature

“…Our result is similar with finding that plants under cold stress have low foliar δ 15 N values (Kohls et al, 1994). A study reported that the plants under slow growing rate have large nitrogen isotopic fractionation (Domenach et al, 1989). The metabolism of plants usually slows down in cold season and consequently, the nutrient uptake evidently decreases.…”

Variation in Foliar 15N Abundance and the Availability of Soil Nitrogen on Walker Branch Watershed

“…Measurements of foliar o 15 N on Walker Branch Watershed, as well as those of another study (Domenach et al 1989), indicate that within-site variation in foliar 15 N abundance is small relative to differences between sites for non-N 2 -fixing tree species. Such patterns suggest that plant nitrogen isotope ratios are related to some property or properties of a site.…”

Contribution of actinorhizal shrubs to site fertility in a Northern California mixed pine forest

“…Similar to our results for mahala mat, they found substantial variation in foliar d 15 N and no significant differences in d 15 N between N-fixing and reference plants. In contrast, favorable results using the natural abundance method have been reported for a variety of crops (Bremer and van Kessel, 1990;George et al, 1993;Androsoff et al, 1995;Doughton et al, 1995;Ramos et al, 2001) and tree species (Shearer et al, 1983;Domenach et al, 1989;Ladha et al, 1993;Salas et al, 2001;Galiana et al, 2002). Common experimental conditions in these studies included: (1) a well-matched reference plant, or, when available, selection of several reference species to provide a range of %Ndfa; (2) growing N-fixing and reference plants in proximity to overcome inherent spatial variability in d 15 N; (3) plant-available d 15 N with an absolute value at least 4% greater than atmospheric d 15 N. These conditions were generally met for bitterbrush but not mahala mat at our study site.…”

Stable Nitrogen Isotopic Changes in Winter Wheat (<i>Triticum aestivum</i> L.) Induced by its Growth Temperature

“…Our result is similar with finding that plants under cold stress have low foliar δ 15 N values (Kohls et al, 1994). A study reported that the plants under slow growing rate have large nitrogen isotopic fractionation (Domenach et al, 1989). The metabolism of plants usually slows down in cold season and consequently, the nutrient uptake evidently decreases.…”

Variation in Foliar 15N Abundance and the Availability of Soil Nitrogen on Walker Branch Watershed

“…Measurements of foliar o 15 N on Walker Branch Watershed, as well as those of another study (Domenach et al 1989), indicate that within-site variation in foliar 15 N abundance is small relative to differences between sites for non-N 2 -fixing tree species. Such patterns suggest that plant nitrogen isotope ratios are related to some property or properties of a site.…”

Contribution of actinorhizal shrubs to site fertility in a Northern California mixed pine forest

“…Similar to our results for mahala mat, they found substantial variation in foliar d 15 N and no significant differences in d 15 N between N-fixing and reference plants. In contrast, favorable results using the natural abundance method have been reported for a variety of crops (Bremer and van Kessel, 1990;George et al, 1993;Androsoff et al, 1995;Doughton et al, 1995;Ramos et al, 2001) and tree species (Shearer et al, 1983;Domenach et al, 1989;Ladha et al, 1993;Salas et al, 2001;Galiana et al, 2002). Common experimental conditions in these studies included: (1) a well-matched reference plant, or, when available, selection of several reference species to provide a range of %Ndfa; (2) growing N-fixing and reference plants in proximity to overcome inherent spatial variability in d 15 N; (3) plant-available d 15 N with an absolute value at least 4% greater than atmospheric d 15 N. These conditions were generally met for bitterbrush but not mahala mat at our study site.…”