Management of phosphorus supply to Australian floricultural species

Gikaara, D. M.; Johnston, Margaret; Edwards, David G.

doi:10.1016/j.scienta.2004.02.008

Cited by 5 publications

(3 citation statements)

References 20 publications

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“…Meanwhile, the high level of Ca and Mg salts (Ca 640 and Mg 384 mg/l) had negative effects on celery above-ground fresh weight, dry shoot biomass and leaf area, which was probably due to osmotic stress. The reduction in yield as a result of P deficiencies was reported previously in many plants (Silber et al 2000;Gikaara et al 2004;Johnston et al 2006). The main effect of P deficiency is the reduction in celery growth rate leading to darker green and smaller leaves, shorter stature, fewer leaves and imbalance between shoot and root growth (Dufault 1985).…”

Section: Discussionmentioning

confidence: 71%

“…In this study, available P concentration in the substrate increased less per unit of applied P at the high levels of P supply because the relationship between available P concentration in the substrate and P supply could be fitted using a power function (y = 1.37 + 8.44x 0.67 , R 2 = 0.90, P < 0.001, n = 15), which indicates that there is some buffering effect of growing medium and could explain why celery plants did not show P toxicity symptoms at high levels of P supply (Gikaara et al 2004). Figs 2 and 3 show that, irrespective of Ca and Mg levels, celery variety Shanghai Huangxin Qin exhibited a critical NaHCO 3 -extractable P level for deficiency of about 23.5 mg/kg (124 mg/l P treatment).…”

Section: Discussionmentioning

confidence: 99%

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Effect of phosphorus on celery growth and nutrient uptake under different calcium and magnesium levels in substrate culture

Li¹,

Wang²,

Li³

et al. 2010

Hort. Sci. (Prague)

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Li Y., Wang T., Li J., Ao Y., 2010. Effect of phosphorus on celery growth and nutrient uptake under different calcium and magnesium levels in substrate culture. Hort. Sci. (Prague), 37: 99-108.A greenhouse pot experiment was performed to study the effect of phosphorus (P) on celery (Apium graveolens L.) growth, quality and nutrient uptake under different calcium (Ca) and magnesium (Mg) levels in substrate culture. Results showed that there were significant interactions between P and the level of Ca and Mg in the growing media. Celery above-ground fresh weight, total dry biomass, leaf area, and P, Ca and Mg concentrations in celery leaves significantly increased from 0 to 124 mg/l P application. The opposite trends were observed for root/shoot ratio, leaf chlorophyll, carotenoids, soluble protein, soluble sugar, vitamin C, and nitrogen and potassium concentration in celery leaves. Medium Ca and Mg level (Ca 320 and Mg 192 mg/l) significantly increased celery above-ground fresh weight, total dry biomass and leaf area compared to low (Ca 160 and Mg 96 mg/l) and high (Ca 640 and Mg 384 mg/l) levels. This study suggested that 124-248 mg/l P applications under medium Ca and Mg level were appropriate for celery nutritional requirements.

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Section: Discussionmentioning

confidence: 71%

Section: Discussionmentioning

confidence: 99%

Effect of phosphorus on celery growth and nutrient uptake under different calcium and magnesium levels in substrate culture

Li¹,

Wang²,

Li³

et al. 2010

Hort. Sci. (Prague)

View full text Add to dashboard Cite

show abstract

“…These adaptations are sometimes coupled with an inability, particularly for some members of the Proteaceae, to downregulate P uptake when P is plentiful, resulting in P toxicity at relatively low P supply (Shane et al, 2003(Shane et al, , 2004. However, the response of Australian native species to added P is variable (Gikaara et al, 2004). For instance, P toxicity at low P supply is most commonly reported for woody, relatively long-lived members of the Proteaceae native to the most P-deficient soils, but it is by no means a ubiquitous trait for the Proteaceae (Shane and Lambers, 2006;Standish et al, 2007).…”

Section: Introductionmentioning

confidence: 99%