Mobilization and Acquisition of Sparingly Soluble P-Sources byBrassicaCultivars under P-Starved Environment I. Differential Growth Response, P-Efficiency Characteristics and P-Remobilization

2009 ◽  
Vol 51 (11) ◽  
pp. 1008-1023 ◽  
Author(s):  
Muhammad Shahbaz Akhtar ◽  
Yoko Oki ◽  
Tadashi Adachi
Keyword(s):  
Growth Response ◽  
P Efficiency ◽  
Differential Growth ◽  
Soluble P ◽  
P Sources

Phosphorus Stress Induced Variations in Growth Behavior and P Efficiency amongBrassicaCultivars Grown with Sparingly Soluble P Sources

2014 ◽  
Vol 45 (15) ◽  
pp. 1995-2017 ◽  
Author(s):  
M. Shahbaz Akhtar ◽  
Yoko Oki ◽  
Makoto Nishigaki ◽  
Tadashi Adachi ◽  
Yoshitaka Nakashima ◽  
...  
Keyword(s):  
Growth Behavior ◽  
P Efficiency ◽  
Phosphorus Stress ◽  
Soluble P ◽  
P Sources

scholarly journals Soil phosphorus availability and soybean response to phosphorus starter fertilizer

2014 ◽  
Vol 38 (5) ◽  
pp. 1487-1495 ◽  
Author(s):  
Ciro Antonio Rosolem ◽  
Alexandre Merlin
Keyword(s):  
Soil Phosphorus ◽  
Soil Surface ◽  
Tropical Soils ◽  
P Fertilization ◽  
Soil P ◽  
Brachiaria Ruziziensis ◽  
Soluble P ◽  
Surface Spread ◽  
P Sources

Phosphorus fixation in tropical soils may decrease under no-till. In this case, P fertilizer could be surface-spread, which would improve farm operations by decreasing the time spend in reloading the planter with fertilizers. In the long term, less soluble P sources could be viable. In this experiment, the effect of surface-broadcast P fertilization with both soluble and reactive phosphates on soil P forms and availability to soybean was studied with or without fertilization with soluble P in the planting furrow in a long-term experiment in which soybean was grown in rotation with Ruzigrass (Brachiaria ruziziensis). No P or 80 kg ha-1 of P2O5 in the form of triple superphosphate or Arad reactive rock phosphate was applied on the surface of a soil with variable P fertilization history. Soil samples were taken to a depth of 60 cm and soil P was fractionated. Soybean was grown with 0, 30, and 60 kg ha-1 of P2O5 in the form of triple phosphate applied in the seed furrow. Both fertilizers applied increased available P in the uppermost soil layers and the moderately labile organic and inorganic forms of P in the soil profile, probably as result of root decay. Soybean responded to phosphates applied on the soil surface or in the seed furrow; however, application of soluble P in the seed furrow should not be discarded. In tropical soils with a history of P fertilization, soluble P sources may be substituted for natural reactive phosphates broadcast on the surface. The planting operation may be facilitated through reduction in the rate of P applied in the planting furrow in relation to the rates currently applied.

scholarly journals Differential Growth Response of Male and Female Chicks to Antibiotic Supplementation

1952 ◽  
Vol 31 (6) ◽  
pp. 1110-1112 ◽  
Author(s):  
A.L. Palafox ◽  
M.M. Rosenberg
Keyword(s):  
Growth Response ◽  
Differential Growth ◽  
Male And Female

Effects of different P-sources in soil on increasing growth and mineral uptake of mycorrhizal Vitis vinifera L. (cv Victoria) vines

OENO One ◽  
2002 ◽  
Vol 36 (4) ◽  
pp. 195 ◽  
Author(s):  
Nikolaos Nikolaou ◽  
N. Karagiannidis ◽  
Stefanos Koundouras ◽  
I. Fysarakis
Keyword(s):  
Root Colonization ◽  
Titratable Acidity ◽  
Mycorrhizal Colonization ◽  
Soluble Solids ◽  
Dihydrogen Phosphate ◽  
Aluminium Phosphate ◽  
Mineral Uptake ◽  
Grapevine Variety ◽  
Soluble P ◽  
P Sources

<p style="text-align: justify;">The effect of different P-sources on growth, leaf chemical composition, and fruit soluble solids and acid content was evaluated in mycorrhizal Victoria grapevine variety gralted onto the rootstocks 3309C or 11 OR. Mycorrhizal and non mycorrhizal plants were grown in 20 L pots containing 20 kg soil supplemented with different P-forms: (Calcium bis-dihydrogen-phosphate, tri-calcium phosphate, aluminium phosphate, iron (III) phosphate) with different solubility, equivalent to 90 kg P.ha<sup>-1</sup>. The percent of mycorrhizal root colonization was higher in insoluble P-form treatments compared to control or to soluble P-form treatment (CaDP), ranging from 66 to 84 % in treatments receiving insoluble P, from 36.67 to 38.33 % in control and from 25.33 to 27.33 % in soluble P-form treatments. The roots of 110R rootstock showed higher colonization rate compared to the 3309C. Mycorrhizal colonization increased both the pruning weight and number of nodes of the vines, up to 9 and 1.9 times respectively, according to the rootstock- P form combination. Mycorrhizal vines showed increased leaf concentrations in N, P, K, Ca. Fruit total soluble solids of mycorrhizal vines were about 30 % lower compared with those of the non mycorrhizal vines. Both factors, mycorrhizal colonization and P-forms had no significant effect in fruit titratable acidity.</p>

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