scholarly journals Significance of Some Soil Amendments and Phosphate Dissolving Bacteria to Enhance the Availability of Phosphate in Calcareous Soil

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Ahmed A. Khalil
Keyword(s):  
Inorganic Phosphate ◽  
Rock Phosphate ◽  
Broad Bean ◽  
Soil Amendments ◽  
Organic Manure ◽  
Phosphate Fertilizers ◽  
Bean Plants ◽  
Bean Yield ◽  
Private Farm

A field experiment was carried-out on a private farm at the Salah El-Din village, El-Bostan district, Nobaria, El-Behera Governorate, Egypt. The aim of this study was to evaluate the best combination of rock phosphate (RP), sulphur (S), organic manure, and phosphate dissolving bacteria (PDB) inoculation to enhance the availability of phosphorous from rock phosphate and their effects on yield of broad bean plants (cv. Luz doe Otono L.). It was found that either sulphur application or PDB inoculation with RP had a significant effect on broad bean yield and its quality. Application of RP and different soil amendments individually or together increased N, P, and K contents in straw and seeds of broad bean plant. The highest contents of the studied nutrients were found when the plants were fertilized by a mixture of RP and different soil amendments. Results also showed the important role of organic matter, sulphur, and PDB for releasing phosphorus from rock phosphate. The combination of soil amendments with RP as a natural P-source, has the possibility of saving significant quantities of industrialized inorganic phosphate fertilizers.

Evaluation role of some types of plant fertilizers toward leaf miners and its parasitoid on broad bean Vicia faba (L.)

2014 ◽  
Vol 3 (3) ◽  
pp. 198-203
Author(s):  
Sawsan S. Moawad ◽  
El-Behery H. ◽  
Ebadah I.M. ◽  
Shalaby Sh. ◽  
El-Fandary O.
Keyword(s):  
Significant Variation ◽  
Broad Bean ◽  
Growth Parameters ◽  
Organic Manure ◽  
Population Fluctuation ◽  
Fertile Plant ◽  
Leaf Miners ◽  
Manure Compost ◽  
Vicia Faba L

The role of four fertilizers type namely (biofertilizers, organic manure, compost el Wadi and chemical fertilizer) toward the population fluctuation of leafminers, Liriomyza spp. and its damage to snap faba bean were evaluated. The population fluctuation of leafminer Liriomyza spp and its' parasitoid increased in case of fertile soil more than unfertile one. The relation between the population fluctuation of leafminer parasitoid was positively affected by the population of leafminers. On other side, the results indicated that the growth parameters of fertile plant were recorded significant variation more than unfertile plant.

Correlation between myocardial contractile force and cytosolic inorganic phosphate during early ischemia

1997 ◽  
Vol 272 (3) ◽  
pp. H1333-H1341 ◽  
Author(s):  
M. X. He ◽  
S. Wang ◽  
H. F. Downey
Keyword(s):  
Inorganic Phosphate ◽  
Contractile Force ◽  
Left Ventricular ◽  
Resonance Spectroscopy ◽  
Rat Hearts ◽  
Initial Control ◽  
Myocardial Contractile Force ◽  
Myocardial Contractile ◽  
Developed Pressure

To test the role of inorganic phosphate (Pi) in downregulation of myocardial contractile force at the onset of ischemia, Pi of rat hearts was determined with 31P nuclear magnetic resonance spectroscopy. Forty cycles of brief hypoperfusion (30% of baseline flow for 33 s) were used to achieve a time resolution of 0.512 s for comparing dynamic changes in Pi and contractile force. Initial control values of left ventricular developed pressure (LVP), heart rate, and oxygen consumption were 136 +/- 11 mmHg, 236 +/- 4 beats/min, and 95 +/- 3 microl O2 x min(-1) x g(-1); these values were unchanged at the end of the experiment. During the first 10 s of hypoperfusion, Pi increased at a rate (percentage of the total observed change) faster than the decrease in LVP; Pi and LVP then changed at the same rate during the remainder of the hypoperfusion. ADP did not change in advance of LVP. Intracellular pH did not change. The results indicate that Pi plays an important role in initiating the downregulation of myocardial contractile force at the onset of ischemia. Perfusion pressure also declined faster than LVP at the onset of ischemia, indicating potential importance of vascular collapse in contractile downregulation during early ischemia.

The role of inorganic phosphate on photosynthesis recovery of common bean after a mild water deficit

Plant Science ◽  
2006 ◽  
Vol 170 (3) ◽  
pp. 659-664 ◽  
Author(s):  
Mauro Guida dos Santos ◽  
Rafael Vasconcelos Ribeiro ◽  
Ricardo Ferraz de Oliveira ◽  
Eduardo Caruso Machado ◽  
Carlos Pimentel
Keyword(s):  
Common Bean ◽  
Water Deficit ◽  
Inorganic Phosphate

scholarly journals Rhizosphere Acidification by Iron Deficient Bean Plants: The Role of Trace Amounts of Divalent Metal Ions

1989 ◽  
Vol 90 (1) ◽  
pp. 359-364 ◽  
Author(s):  
H. Frits Bienfait ◽  
Henk J. Lubberding ◽  
Peter Heutink ◽  
L. Lindner ◽  
Jacques Visser ◽  
...  
Keyword(s):  
Metal Ions ◽  
Divalent Metal ◽  
Divalent Metal Ions ◽  
Rhizosphere Acidification ◽  
Bean Plants ◽  
Iron Deficient

scholarly journals Looming Scarcity of Phosphate Rock and Intensification of Soil Phosphorus Research

2015 ◽  
Vol 39 (3) ◽  
pp. 637-642 ◽  
Author(s):  
Philippe C. Baveye
Keyword(s):  
Phosphate Rock ◽  
Rock Phosphate ◽  
Soil Phosphorus ◽  
Agricultural Practices ◽  
Phosphate Fertilizers ◽  
Soil P ◽  
The Past ◽  
Essential Resource ◽  
The Moment ◽  
Short Essay

In recent years, many researchers have claimed that world reserves of rock phosphate were getting depleted at an alarming rate, putting us on the path to scarcity of that essential resource within the next few decades. Others have claimed that such alarmist forecasts were frequent in the past and have always been proven unfounded, making it likely that the same will be true in the future. Both viewpoints are directly relevant to the level of funding devoted to research on the use of phosphate fertilizers. In this short essay, it is argued that information about future reserves of P or any other resource are impossible to predict, and therefore that the threat of a possible depletion of P reserves should not be used as a key motivation for an intensification of research on soil P. However, there are other, more compelling reasons, both geopolitical and environmental, to urgently step up our collective efforts to devise agricultural practices that make better use of P than is the case at the moment.

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