Interactive effects of exogenous combined nitrogen and phosphorus on growth and nitrogen fixation by azolla

1989 ◽  
Vol 117 (1) ◽  
pp. 1-8 ◽  
Author(s):  
R. N. Sah ◽  
S. S. Goyal ◽  
D. W. Rains
Keyword(s):  
Nitrogen Fixation ◽  
Interactive Effects ◽  
Nitrogen And Phosphorus ◽  
Combined Nitrogen

scholarly journals Studies on Nitrogen Fixation by Blue-Green Algae

1942 ◽  
Vol 19 (1) ◽  
pp. 78-87
Author(s):  
G. E. FOGG
Keyword(s):  
Nitrogen Fixation ◽  
Green Algae ◽  
Anabaena Cylindrica ◽  
Fixed Nitrogen ◽  
Blue Green Algae ◽  
Combined Nitrogen

1. Anabaena cylindrica Lemin. has been obtained in pure unialgal bacteria-free culture. 2. Due precautions having been taken against contamination by other organisms and error due to absorption of fixed nitrogen from the atmosphere, this alga has been shown to possess the capacity of fixing nitrogen. 3. Nitrogen fixation does not take place in the presence of a sufficient quantity of readily available combined nitrogen.

Combined Nitrogen and Phosphorus Fertilization for Controlling the Toxigenic AlgaPrymnesium parvum

2007 ◽  
Vol 69 (3) ◽  
pp. 214-222 ◽  
Author(s):  
Gerald L. Kurten ◽  
Aaron Barkoh ◽  
Loraine T. Fries ◽  
Drew C. Begley
Keyword(s):  
Phosphorus Fertilization ◽  
Nitrogen And Phosphorus ◽  
Combined Nitrogen

Interactive Effects of Nutrient Availability and Light Levels on the Periphyton Composition of a Large Oligotrophic Lake

1993 ◽  
Vol 50 (6) ◽  
pp. 1270-1278 ◽  
Author(s):  
Jane Claire Marks ◽  
Rex L. Lowe
Keyword(s):  
Interactive Effect ◽  
Oligotrophic Lake ◽  
Interactive Effects ◽  
Nitrogen And Phosphorus ◽  
Phosphorus Enrichment ◽  
Blue Green Algae ◽  
Nitzschia Palea ◽  
Nitrogen Levels ◽  
Light Levels ◽  
Nitrogen Phosphorus

We investigated the effects of nitrogen, phosphorus, and light on periphyton in a clear oligotrophic lake. Experimental treatments consisted of three levels each of nitrogen, phosphorus, and light in a three-way factorial design. Nitrogen and phosphorus concentrations were manipulated using nutrient-diffusing clay substrates; light levels were manipulated with shade cloth. Periphyton biovolume and cell densities increased significantly with both nitrogen and phosphorus enrichment but were not affected by shading. Phosphorus enrichment increased periphyton accumulation only when nitrogen levels were high, indicating a significant interactive effect between nitrogen and phosphorus. Differences in species composition among treatments were mostly due to changes in the diatoms Nitzschia palea and Rhopalodia gibba. Ambient and phosphorus-enriched substrates were dominated by R. gibba, which contains a nitrogen-fixing endosymbiont, and blue-green algae. Nitrogen enrichment and nitrogen and phosphorus in combination resulted in an assemblage dominated by N. palea. Unshaded and highly shaded substrates were dominated by N. palea and Achnanthes minutissima, but the medium-shade substrates were dominated by R. gibba.

Nitrogen and phosphorus uptake and nitrogen fixation estimation of faba bean ( Vicia faba L.) in Western Canada

2021 ◽  
Author(s):  
Serena Roslyn Klippenstein ◽  
Hamid Khazaei ◽  
Albert Vandenberg ◽  
Jeff Schoenau
Keyword(s):  
Nitrogen Fixation ◽  
Vicia Faba ◽  
Faba Bean ◽  
Phosphorus Uptake ◽  
Western Canada ◽  
Nitrogen And Phosphorus ◽  
Vicia Faba L ◽  
Nitrogen And Phosphorus Uptake

scholarly journals The effect of inoculation of pea plants with mycorrhizal fungi and Rhizobium on nitrogen and phosphorus assimilation

2011 ◽  
Vol 52 (No. 10) ◽  
pp. 435-440 ◽  
Author(s):  
M. Geneva ◽  
G. Zehirov ◽  
E. Djonova ◽  
N. Kaloyanova ◽  
G. Georgiev ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Mycorrhizal Fungi ◽  
Glomus Mosseae ◽  
Rhizobium Leguminosarum ◽  
Glomus Intraradices ◽  
Plant Biomass ◽  
Phosphorus Level ◽  
Nitrogen And Phosphorus ◽  
Nitrogen Fixation Activity ◽  
Fixation Activity

The study evaluated the response of pea (Pisum sativum cv. Avola) to arbuscular mycorrhizal fungi (AM) species Glomus mosseae and Glomus intraradices and Rhizobium leguminosarum bv. viceae, strain D 293, regarding the growth, photosynthesis, nodulation and nitrogen fixation activity. Pea plants were grown in a glasshouse until the flowering stage (35 days), in 4 kg plastic pots using leached cinnamonic forest soil (Chromic Luvisols – FAO) at P levels 13.2 (P1) and 39.8 (P2) mg P/kg soil. The obtained results demonstrated that the dual inoculation of pea plants significantly increased the plant biomass, photosynthetic rate, nodulation, and nitrogen fixation activity in comparison with single inoculation with Rhizobium leguminosarum bv. viceae strain D 293. On the other hand, coinoculation significantly increased the total phosphorus content in plant tissue, acid phosphatase activity and percentage of root colonization. The effectiveness of coinoculation with Rhizobium leguminosarum and Glomus mosseae was higher at the low phosphorus level while the coinoculation with Glomus intraradices appeared to be the most effective at higher phosphorus level.

Nutrients Within Integrated Bleached Kraft Mills: Sources and Behaviour in Aerated Stabilisation Basins

1999 ◽  
Vol 40 (11-12) ◽  
pp. 77-84 ◽  
Author(s):  
A. H. Slade ◽  
C. M. Nicol ◽  
J. Grigsby
Keyword(s):  
Nitrogen Fixation ◽  
Paper Industry ◽  
Pulp And Paper Industry ◽  
Nutrient Supply ◽  
Point Sources ◽  
Nutrient Requirements ◽  
Nitrogen And Phosphorus ◽  
Nutrient Supplementation ◽  
Nutrient Sources ◽  
Kraft Mill

As constraints on the discharge of nitrogen and phosphorus from the pulp and paper industry become tighter, a thorough knowledge of nutrient sources, and their behaviour through treatment systems, is required. Once nutrient behaviour has been characterised, strategies to minimise discharge can be formulated. A survey of nutrient sources around a modern ECF integrated bleached kraft mill showed that point sources of nitrogen and phosphorus could be identified. Approximately 40% of the nitrogen was contained in the foul condensate stream and 40% of the phosphorus contained in the acid stage of bleaching. Three Aerated Stabilisation Basin treatment systems were studied, two of which were nutrient limited in terms of theoretical nutrient requirements. All three systems achieved approximately 90% BOD removal without nutrient supplementation. For the wastewater with a high BOD:N ratio (100:0.8), nitrogen fixation was shown to be important. Benthic recycling was a more important mechanism when the BOD:N ratio was lower (100:2.1). For a severely phosphorus limited wastewater (BOD:P 100:0.04), treated in a system with a long retention time (85 d), benthic recycling was the predominant mechanism for nutrient supply. The relative roles of nitrogen fixation and benthic feed back to the nitrogen cycle in aerated stabilisation basins are discussed.

Nitrogen and phosphorus concentrations and allocation strategies among shrub organs: the effects of plant growth forms and nitrogen-fixation types

2018 ◽  
Vol 427 (1-2) ◽  
pp. 305-319 ◽  
Author(s):  
Qiang Zhang ◽  
Gaoming Xiong ◽  
Jiaxiang Li ◽  
Zhijun Lu ◽  
Yuelin Li ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Plant Growth ◽  
Growth Forms ◽  
Nitrogen And Phosphorus ◽  
Allocation Strategies
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