Factors Affecting Tissue Nutrient Concentrations in a Scirpus-Equisetum Wetland

Ecology ◽  
1979 ◽  
Vol 60 (2) ◽  
pp. 337-348 ◽  
Author(s):  
Allan N. D. Auclair
Keyword(s):  
Nutrient Concentrations ◽  
Factors Affecting ◽  
Tissue Nutrient Concentrations

scholarly journals Exploring the factors affecting carbon and nutrient concentrations in tree biomass components in natural forests, forest plantations and short rotation forestry

2018 ◽  
Vol 5 (1) ◽  
Author(s):  
Roque Rodríguez-Soalleiro ◽  
Cristina Eimil-Fraga ◽  
Esteban Gómez-García ◽  
Juan Daniel García-Villabrille ◽  
Alberto Rojo-Alboreca ◽  
...  
Keyword(s):  
Nutrient Concentrations ◽  
Forest Plantations ◽  
Natural Forests ◽  
Tree Biomass ◽  
Factors Affecting ◽  
Short Rotation ◽  
Biomass Components

Wine Grape Tissue Nutrient Concentrations in the Inland Pacific Northwest

2012 ◽  
Vol 43 (1-2) ◽  
pp. 21-27 ◽  
Author(s):  
Joan R. Davenport ◽  
Jeffrey D. Lunden ◽  
Tanya Winkler
Keyword(s):  
Pacific Northwest ◽  
Nutrient Concentrations ◽  
Wine Grape ◽  
Tissue Nutrient Concentrations

scholarly journals Factors affecting decomposition rates of chironomid (Diptera) pupal exuviae

2014 ◽  
Author(s):  
Rathi G. Kavanaugh ◽  
Alexander T. Egan ◽  
Leonard C. Ferrington, Jr.
Keyword(s):  
Water Quality ◽  
Microbial Activity ◽  
Chironomus Riparius ◽  
Nutrient Concentrations ◽  
Biological Degradation ◽  
Decomposition Rates ◽  
Dissolved Nutrients ◽  
Pupal Exuviae ◽  
Factors Affecting ◽  
Process Decomposition

<p>Collections of floating chironomid pupal exuviae are used to monitor water quality and assess ecological conditions. Factors controlling exuviae sinking rates are not well known, although they should have an effect on conclusions that can be drawn from collections. The current study was conducted to determine the rate of sinking under controlled laboratory conditions using water from three streams with different nutrient levels. Sinking rates ranged from less than a day to seven days, depending on microbial activity, nutrient concentrations, temperature and turbulence. Results also varied by genus, with pupal exuviae of <em>Chironomus riparius</em>, <em>Diamesa nivoriunda</em>, <em>Orthocladius</em> (<em>Euorthocladius</em>) <em>thienemanni </em>and <em>Eukiefferiella </em>sp. used in experiments. Four species of bacteria and eight genera of fungi colonized and metabolized exuviae, with bacteria dominant early and fungi dominant later in the decomposition process. Decomposition was faster in lightly chitinized abdominal conjunctive areas, which resulted in exuviae breaking apart and sinking. Examination of untreated, dewaxed and dewaxed-deproteinized exuviae indicated that untreated exuviae sank faster. Waxes appeared important for colonization and initial microbial metabolization was delayed when waxes were removed. Results confirm the importance of biological degradation of exuviae in determining floatation times. We predict that streams and other waterbodies with high dissolved nutrients will result in rapidly sinking exuviae, while exuviae in low nutrient waterbodies will float longer.</p><p><em>Article submitted 1. October 2014, accepted 18. November 2014, published 22. December 2014.</em></p>

scholarly journals Controlled-release Fertilizer during Cutting Propagation Affects Growth and Tissue Nutrient Concentrations of Rooted Cuttings of Annual Bedding Plants

HortScience ◽  
2014 ◽  
Vol 49 (2) ◽  
pp. 152-159 ◽  
Author(s):  
Christopher J. Currey ◽  
Roberto G. Lopez
Keyword(s):  
Controlled Release ◽  
Dry Mass ◽  
Water Soluble ◽  
Nutrient Concentrations ◽  
Controlled Release Fertilizer ◽  
Bedding Plants ◽  
Tissue Nutrient Concentrations ◽  
Soluble Fertilizer ◽  
Soilless Substrate ◽  
The Impact

Our objectives were to quantify the effects of controlled-release fertilizer (CRF) on the growth, morphology, and tissue nutrient concentration of annual bedding plants during propagation. Unrooted cuttings of Angelonia angustifolia ‘AngelFace White’ and ‘Sundancer Pink’, Impatiens hawkeri ‘Celebrette Apricot’ and ‘Celebrette Rose Hot’, Nemesia fruticans ‘Bluebird’ and ‘Raspberry Sachet’, Pelargonium ×hortorum ‘Savannah Red’, and Petunia ×hybrida ‘Cascadia Marshmallow Pink’ and ‘Suncatcher Yellow’ were received from a commercial propagator. Cuttings were immediately stuck individually in cells containing soilless substrate supplemented with 0, 3, 6, 12, or 24 g·L−1 CRF (Osmocote Plus 15–3.9–10 3–4 month) and placed under clear mist water or cuttings were stuck in substrate containing no CRF and fertilized with water-soluble fertilizer beginning immediately after placing cuttings into propagation. Shoot dry mass of cuttings grown in substrates containing up to 12 or 24 g·L−1 CRF increased by up to 150% for some taxa compared with unfertilized cuttings. Incorporating CRFs into propagation substrates increased the concentration of nitrogen (N), phosphorus (P), and potassium (K) in tissues by up to 103%, 42%, and 137%, respectively, compared with unfertilized cuttings. Additionally, tissue nutrient concentrations for cuttings fertilized with 6 g·L−1 CRF or greater were similar to cuttings receiving water-soluble fertilizer (WSF). When the impact of CRF on growth and nutrient concentrations are taken together, our results indicate that CRF is a fertilization application technology that holds promise for use during propagation of herbaceous stem-tip cuttings.

scholarly journals Nutritional disorder in Pfaffia glomerata by mercury excess in nutrient solution

2015 ◽  
Vol 46 (2) ◽  
pp. 279-285 ◽  
Author(s):  
Nicéia Spanholi Calgaroto ◽  
Fernando Teixeira Nicoloso ◽  
Luciane Belmonte Pereira ◽  
Denise Cargnelutti ◽  
Fabiane Goldschmidt Antes ◽  
...  
Keyword(s):  
Nutrient Solution ◽  
The Other ◽  
Nutrient Concentrations ◽  
Nutritional Disorder ◽  
Pfaffia Glomerata ◽  
P Concentration ◽  
Other Hand ◽  
Fe And Mn ◽  
Tissue Nutrient Concentrations ◽  
Mn Concentrations

ABSTRACT: The mineral nutritional homeostasis in response to different concentrations of Hg (0, 25 and 50μM) was evaluated in Pfaffia glomerata plant. The exposure to the highest level of Hg (50µM) caused a decreasing in shoot and root fresh weights of 15.5% and 20%, respectively. Both shoot and root Hg concentrations increased linearly with increasing external Hg concentrations. Ca concentration decreased in shoot only at 50µM Hg, whereas shoot K and Mg concentrations decreased at both 25 and 50µM Hg, when compared to the control. A significant decrease in Cu, Zn, Fe and Mn concentrations in plants exposed to Hg was observed, but most Zn, Mn, and Cu in the roots. On the other hand, P concentration increased in both root and shoot of plants exposed at 25 and 50µM Hg, whereas Na concentration increased only in the root at 25 and 50µM Hg exposure. In general, tissue nutrient concentrations in P. glomerata plantlets exposed to Hg were significantly decreased, which indicates that the Hg may cause alteration on the mineral nutritional homeostasis of this species.

Sign in / Sign up

Export Citation Format

Share Document