Phosphorus Utilization Efficiency in Populations of Narrow-Leaf Birdsfoot Trefoil

2003 ◽  
Vol 34 (1-2) ◽  
pp. 271-284 ◽  
Author(s):  
Mariana Kade ◽  
Eduardo A. Pagani ◽  
Rodolfo E. Mendoza
Keyword(s):  
Utilization Efficiency ◽  
Birdsfoot Trefoil ◽  
Phosphorus Utilization ◽  
Narrow Leaf ◽  
Phosphorus Utilization Efficiency

scholarly journals Impact of Mycorrhization on Phosphorus Utilization Efficiency of Acacia gummifera and Retama monosperma under Salt Stress

Forests ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 611
Author(s):  
Abdessamad Fakhech ◽  
Martin Jemo ◽  
Najat Manaut ◽  
Lahcen Ouahmane ◽  
Mohamed Hafidi
Keyword(s):  
Salt Stress ◽  
Root Growth ◽  
N Uptake ◽  
P Uptake ◽  
Utilization Efficiency ◽  
Legume Species ◽  
Growth Responses ◽  
Phosphorus Utilization ◽  
Phosphorus Utilization Efficiency ◽  
Shoot And Root Growth

The impact of salt stress on the growth and phosphorus utilization efficiency (PUE) of two leguminous species: Retama monosperma and Acacia gummifera was studied. The effectiveness of arbuscular mycorrhizal fungi (AMF) to mitigate salt stress was furthermore assessed. Growth, N and P tissue concentrations, mycorrhizal root colonization frequency and intensity, and P utilization efficiency (PUE) in the absence or presence of AMF were evaluated under no salt (0 mM L−1) and three salt (NaCl) concentrations of (25, 50 and 100 mM L−1) using a natural sterilized soil. A significant difference in mycorrhizal colonization intensity, root-to-shoot ratio, P uptake, PUE, and N uptake was observed between the legume species. Salt stress inhibited the shoot and root growth, and reduced P and N uptake by the legume species. Mycorrhizal inoculation aided to mitigate the effects of salt stress with an average increase of shoot and root growth responses by 35% and 32% in the inoculated than in the non-inoculated A. gummifera treatments. The average shoot and root growth responses were 37% and 45% higher in the inoculated compared to the non-inoculated treatments of R. monosperma. Average mycorrhizal shoot and root P uptake responses were 66% and 68% under A. gummifera, and 40% and 95% under R. monosperma, respectively. Mycorrhizal inoculated treatments consistently maintained lower PUE in the roots. The results provide insights for further investigations on the AMF conferred mechanisms to salt stress tolerance response by A. gummifera and R. monosperma, to enable the development of effective technologies for sustainable afforestation and reforestation programs in the Atlantic coast of Morocco.

Phosphorus Utilization Efficiency as Affected by Component Population, Rhizobial Inoculation and Applied Nitrogen in Maize/Mungbean Intercropping

1992 ◽  
Vol 28 (3) ◽  
pp. 255-263 ◽  
Author(s):  
Mrinal K. Chowdhury ◽  
Elpidio L. Rosario
Keyword(s):  
Utilization Efficiency ◽  
Total Absorption ◽  
Land Equivalent Ratio ◽  
Phosphorus Utilization ◽  
Phosphorus Absorption ◽  
Phosphorus Utilization Efficiency ◽  
Rhizobial Inoculation ◽  
Parallel Increase ◽  
Overall Efficiency ◽  
Applied Nitrogen

SummaryThe effects of component population, rhizobial inoculation and applied nitrogen on the efficiency of phosphorus utilization in maize/mungbean intercropping were examined in two experiments. The efficiency of phosphorus absorption decreased by between 5 and 43% in maize and by between 31 and 58% in mungbean as a result of intercropping. The overall efficiency of phosphorus absorption in intercropping decreased with increasing nitrogen level but a parallel increase in overall conversion efficiency maintained a constant and large land equivalent ratio (LER) up to the highest level of nitrogen. The increase in LER over unity, however, was due primarily to the greater total absorption of phosphorus by maize and mungbean together in intercropping compared with that when they were grown in pure stands.

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