Manganese Toxicity—In Particular When Growing Plants in Bark Compost

Solbraa, K.; Selmer-Olsen, A. R.

doi:10.1080/00015128109435300

Cited by 8 publications

(4 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is possible that the Mn originated in the pine bark used in the substrate. Some sources of fresh bark have been documented to have excessive levels of Mn (Solbraa and Selmer-Olsen, 1981). To counteract the effects of Mn accumulation in plant tissues, sodium silicate was added to each fertilizer solution at a 0.05 M concentration.…”

Section: Methodsmentioning

confidence: 99%

Nitrogen and Phosphorus Uptake Efficiency and Partitioning of Container-grown Azalea During Spring Growth

Ristvey¹,

Lea‐Cox²,

Ross³

2007

J. Amer. Soc. Hort. Sci.

View full text Add to dashboard Cite

The influence of fertilization rate on nitrogen (N) and phosphorus (P) nutrient partitioning and uptake efficiency of young, container-grown azalea (Rhododendron L. ‘Karen’) was determined under controlled greenhouse conditions during Spring 2001 and 2002. In 2001, fertilizer treatments included a factorial combination of two N (25 or 250 mg/week) and three P (0, 5, or 25 mg/week) rates; in 2002, an additional N rate (100 mg/week) was included in the experimental design. Five destructive harvests were performed during each study; plant tissues (root, stem, primary and secondary branches and leaves) from each harvest were analyzed to derive total N and P uptake. Leachates from containers were monitored and analyzed weekly to calculate nitrate (NO3-N), ammonium (NH4-N), and orthophosphate (PO4-P) loss. Fertilization rates of 5 mg P per week in 2001 and rates of 100 mg N per week and 5 mg P per week in 2002 maintained optimal growth compared with the highest fertilization rates (250 mg N and 25 mg P per week) in these studies. Increasing N fertilization rate largely promoted shoot growth, whereas decreasing N and P fertilization rates promoted root growth and increased uptake efficiency. In general, increasing N and P fertilization rates increased nutrient N and P leaching from the pine bark substrate. Reducing excess N and P fertilization to match plant growth requirements of young azalea increases nutrient uptake efficiency and reduces nutrient loss to the environment.

show abstract

Section: Methodsmentioning

confidence: 99%

Nitrogen and Phosphorus Uptake Efficiency and Partitioning of Container-grown Azalea During Spring Growth

Ristvey¹,

Lea‐Cox²,

Ross³

2007

J. Amer. Soc. Hort. Sci.

View full text Add to dashboard Cite

show abstract

“…These increases were accompanied by decreases in 'oxide' Mn, indicating either dissolution of oxides or of strongly bound forms of Mn at low pH. It has been reported that exchangeable Mn concentrations above 38 mg/L medium [determined by extraction with 0.5M Mg(NO3)2] are potentially toxic to plants (18). On the basis that the amounts of exchangeable Mn in media of low pH are similar to the sum of the amounts appearing in the 'readily soluble' and 'weakly adsorbed 1 fractions of the sequential fractionation (Tables 1, 3, 5, and 6), it can be concluded that Mn toxicity is unlikely in plants growing in unamended P. radiata bark and the same bark amended with 10 mg/L Mn 2+ (Table 1).…”

Section: Discussionmentioning

confidence: 97%

“…However, as more than 38 mg/L of 0.5M Mg(NO3)2-exchangeable Mn are potentially toxic to plants (18), and as this is about the level at which the 2 mM DTPA used in a 1:1.5 v/v extraction becomes saturated (Table 3), any medium with more than about 60 mg/L 2 mM DTPAextractable Mn (Table 3) should be regarded as having a potential for causing Mn toxicity in plants, should its pH fall below 5.5 (Table 1). DTPA (2 mM) extracted up to 35.7 mg/L Mn and 0.5M Ca(NO3)2 extracted 29.8 mg/L from the bark/rice hulls medium (Table 3).…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Forms and extractability of manganese in potting media

Handreck

1995

Communications in Soil Science and Plant Analysis

View full text Add to dashboard Cite

Models for predicting soil zinc availability for barley

Xin-rong¹,

Aasen²

1994

Plant Soil

View full text Add to dashboard Cite

Regression models are proposed for the prediction of soil zinc availability within different pH ranges. The relationship between zinc concentration in barley plants, zinc content in soils and soil pH was described using a two-dimensional diagram. Results show that the soil zinc availability is significantly affected by pH changes at pH above 6.5. Below this point, the pH effect becomes gradually less important. In the low pH range, the soil zinc availability is mainly dependent on soil zinc quantity.

show abstract

Manganese Toxicity—In Particular When Growing Plants in Bark Compost

Cited by 8 publications

References 8 publications

Nitrogen and Phosphorus Uptake Efficiency and Partitioning of Container-grown Azalea During Spring Growth

Nitrogen and Phosphorus Uptake Efficiency and Partitioning of Container-grown Azalea During Spring Growth

Forms and extractability of manganese in potting media

Models for predicting soil zinc availability for barley

Contact Info

Product

Resources

About