Abstract
The purpose of the present study was to investigate the suitability of different soilless substrates for container production of highbush blueberry ( Vaccinium sp.). Young plants of ‘Snowchaser’ blueberry were grown in 4.4-L pots filled with media containing 10% perlite and varying proportions of sphagnum moss, coconut ( Cocos nucifera L.) coir, and douglas fir [ Pseudotsuga menziesii Mirb. (Franco)] bark, as well as a commercially available mix of peatmoss, perlite, and other ingredients for comparison. Total plant dry weight (DW) was similar among the treatments at 72 days after transplanting, but at 128 days, total DW was nearly twice as much in the commercial mix and in media with ≥60% peat or coir than in media with ≥60% bark. Inadequate irrigation likely played a role in poor plant growth in bark. Bark had lower porosity and water holding capacity than peat, coir, or the commercial mix and, therefore, dried quickly between irrigations. Bark also reduced plant uptake efficiency of a number of nutrients, including N, P, K, S, Ca, Mg, Mn, B, Cu, and Zn. Uptake efficiency of P, K, and Mg also differed between plants grown in peat and coir, which in most cases was a function of the initial concentration of nutrients in the media. Before planting, peat had the highest concentration of Mg and Fe among the media, whereas coir had the highest concentration of P and K. Leachate pH was initially lowest with peat and highest with coir but was similar among each of the media treatments by the end of the study. Electrical conductivity (EC) of leachate never exceeded 0.84 dS·m −1 in any treatment. Overall, peat and coir appear to be good substrates for container production of highbush blueberry. Bark, on the other hand, was less suitable, particularly when it exceeded 30% of the total media composition.
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Claims 15
Claim · model-written summary
Blueberry total dry weight was similar among substrate treatments at 72 days.
- Taxon
- highbush blueberry
Vaccinium corymbosumt0 - Treatment
- treatmentse0
- Outcome
- Total plant dry weighte0
- Direction
- similare0
- Qualifier
- 72 days after transplantinge0
- Comparator
- among the treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total plant dry weight (DW) was similar among the treatments at 72 days after transplanting”
t0“highbush blueberry”
Claim · model-written summary
At 128 days, blueberry dry weight in commercial mix and media with at least 60% peat or coir was nearly twice that with at least 60% bark.
- Taxon
- highbush blueberryVaccinium corymbosumt0
- Treatment
- commercial mix and in media with ≥60% peat or coire0
- Outcome
- total DWe0
- Direction
- nearly twice as muche0
- Qualifier
- at 128 dayse0
- Comparator
- media with ≥60% barke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at 128 days, total DW was nearly twice as much in the commercial mix and in media with ≥60% peat or coir than in media with ≥60% bark.”
t0“highbush blueberry”
Claim · model-written summary
Bark had lower porosity and water holding capacity than peat, coir or commercial mix.
- Taxon
- highbush blueberryVaccinium corymbosumt0
- Treatment
- Barke0
- Outcome
- porosity and water holding capacitye0
- Direction
- lowere0
- Comparator
- peat, coir, or the commercial mixe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bark had lower porosity and water holding capacity than peat, coir, or the commercial mix”
t0“highbush blueberry”
Claim · model-written summary
Bark reduced blueberry uptake efficiency for N, P and K.
- Taxon
- highbush blueberryVaccinium corymbosumt0
- Treatment
- Barke0
- Outcome
- plant uptake efficiency of a number of nutrients, including N, P, Ke0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bark also reduced plant uptake efficiency of a number of nutrients, including N, P, K, S, Ca, Mg, Mn, B, Cu, and Zn.”
t0“highbush blueberry”
Claim · model-written summary
Bark reduced blueberry uptake efficiency for S, Ca and Mg.
- Taxon
- highbush blueberryVaccinium corymbosumt0
- Treatment
- Barke0
- Outcome
- plant uptake efficiency of a number of nutrients, including N, P, K, S, Ca, Mge0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bark also reduced plant uptake efficiency of a number of nutrients, including N, P, K, S, Ca, Mg, Mn, B, Cu, and Zn.”
t0“highbush blueberry”
Claim · model-written summary
Bark reduced blueberry uptake efficiency for Mn, B and Cu.
- Taxon
- highbush blueberryVaccinium corymbosumt0
- Treatment
- Barke0
- Outcome
- plant uptake efficiency of a number of nutrients, including N, P, K, S, Ca, Mg, Mn, B, Cue0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bark also reduced plant uptake efficiency of a number of nutrients, including N, P, K, S, Ca, Mg, Mn, B, Cu, and Zn.”
t0“highbush blueberry”
Claim · model-written summary
Bark reduced blueberry zinc uptake efficiency.
- Taxon
- highbush blueberryVaccinium corymbosumt0
- Treatment
- Barke0
- Outcome
- plant uptake efficiency of a number of nutrients, including N, P, K, S, Ca, Mg, Mn, B, Cu, and Zne0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bark also reduced plant uptake efficiency of a number of nutrients, including N, P, K, S, Ca, Mg, Mn, B, Cu, and Zn.”
t0“highbush blueberry”
Claim · model-written summary
Blueberry uptake efficiency of P, K and Mg differed between peat and coir.
- Taxon
- highbush blueberryVaccinium corymbosumt0
- Treatment
- peate0
- Outcome
- Uptake efficiency of P, K, and Mge0
- Direction
- differede0
- Comparator
- coire0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Uptake efficiency of P, K, and Mg also differed between plants grown in peat and coir”
t0“highbush blueberry”
Claim · model-written summary
Peat had the highest preplant Mg and Fe concentrations.
- Taxon
- highbush blueberryVaccinium corymbosumt0
- Treatment
- peate0
- Outcome
- concentration of Mg and Fee0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Before planting, peat had the highest concentration of Mg and Fe among the media”
t0“highbush blueberry”
Claim · model-written summary
Coir had the highest preplant P and K concentrations.
- Taxon
- highbush blueberryVaccinium corymbosumt0
- Treatment
- coire0
- Outcome
- concentration of P and Ke0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whereas coir had the highest concentration of P and K.”
t0“highbush blueberry”
Claim · model-written summary
Leachate pH was initially lowest with peat and highest with coir.
- Taxon
- highbush blueberryVaccinium corymbosumt0
- Treatment
- peat and highest with coire0
- Outcome
- Leachate pHe0
- Direction
- loweste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leachate pH was initially lowest with peat and highest with coir”
t0“highbush blueberry”
Claim · model-written summary
Leachate pH became similar across media by study end.
- Taxon
- highbush blueberryVaccinium corymbosumt0
- Treatment
- media treatmentse0
- Outcome
- pHe0
- Direction
- similare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leachate pH was initially lowest with peat and highest with coir but was similar among each of the media treatments by the end of the study.”
t0“highbush blueberry”
Claim · model-written summary
Leachate conductivity did not exceed 0.84 dS·m −1.
- Taxon
- highbush blueberryVaccinium corymbosumt0
- Outcome
- Electrical conductivity (EC) of leachatee0
- Direction
- never exceedede0
- Value
- 0.84 dS·m −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Electrical conductivity (EC) of leachate never exceeded 0.84 dS·m −1 in any treatment.”
t0“highbush blueberry”
Claim · model-written summary
Peat and coir were judged good substrates for container blueberry.
- Taxon
- highbush blueberryVaccinium corymbosume0
- Outcome
- good substrates for container production of highbush blueberrye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Overall, peat and coir appear to be good substrates for container production of highbush blueberry.”
Claim · model-written summary
Bark was judged less suitable, particularly above 30% of the medium.
- Taxon
- highbush blueberryVaccinium corymbosumt0
- Outcome
- less suitablee0
- Qualifier
- exceeded 30% of the total media compositione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bark, on the other hand, was less suitable, particularly when it exceeded 30% of the total media composition.”
t0“highbush blueberry”
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See all 17 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.