Abstract
Abstract Red pine (Pinus resinosa Ait.) seedlings were grown for 15 weeks over a range of nutrient regimes to calibrate a test procedure used for monitoring nutrient status of a common container growing medium. The test was based on a saturated aqueous extract of the growing medium, obtained by suction displacement. Seedling growth and nutrition exhibited typical responses of deficiency, sufficiency, luxury consumption and toxicity over the range of substrate fertility examined. Water extractable nutrients of the growing medium were related to yield and nutrient uptake of the seedlings. Ranges of nutrient levels associated with maximum dry matter production were selected as provisional values for optimum growth of containerized red pine seedlings. The following critical nutrient levels were considered optimum for red pine seedlings managed under similar cultural conditions: 15–65 ppm N (as NH4 +), 35–95 ppm P, 25–115 ppm K, 30–60 ppm Ca, 15–35 ppm Mg, and electrical conductivity of 1.0–2.2 dS/m.
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Claims 8
Claim · model-written summary
Red pine seedlings displayed deficiency, sufficiency, luxury consumption and toxicity across fertility levels.
- Taxon
- Red pine
Pinus resinosae1 - Outcome
- Seedling growth and nutritione0
- Qualifier
- range of substrate fertilitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seedling growth and nutrition exhibited typical responses of deficiency, sufficiency, luxury consumption and toxicity over the range of substrate fertility examined.”
e1“Red pine (Pinus resinosa Ait.) seedlings”
Claim · model-written summary
Water extractable nutrients were related to seedling yield and uptake.
- Taxon
- Red pinePinus resinosae1
- Treatment
- Water extractable nutrients of the growing mediume0
- Outcome
- yield and nutrient uptake of the seedlingse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water extractable nutrients of the growing medium were related to yield and nutrient uptake of the seedlings.”
e1“Red pine (Pinus resinosa Ait.) seedlings”
Claim · model-written summary
Optimum red pine seedling N was 15–65 ppm.
- Taxon
- red pinePinus resinosae1
- Outcome
- Ne0
- Value
- 15–65 ppme0
- Qualifier
- as NH4 +e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“15–65 ppm N (as NH4 +), 35–95 ppm P, 25–115 ppm K, 30–60 ppm Ca, 15–35 ppm Mg, and electrical conductivity of 1.0–2.2 dS/m”
e1“optimum for red pine seedlings managed under similar cultural conditions”
Claim · model-written summary
Optimum red pine seedling P was 35–95 ppm.
- Taxon
- red pinePinus resinosae1
- Outcome
- Pe0
- Value
- 35–95 ppme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“35–95 ppm P”
e1“optimum for red pine seedlings managed under similar cultural conditions”
Claim · model-written summary
Optimum red pine seedling K was 25–115 ppm.
- Taxon
- red pinePinus resinosae1
- Outcome
- Ke0
- Value
- 25–115 ppme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“25–115 ppm K”
e1“optimum for red pine seedlings managed under similar cultural conditions”
Claim · model-written summary
Optimum red pine seedling Ca was 30–60 ppm.
- Taxon
- red pinePinus resinosae1
- Outcome
- Cae0
- Value
- 30–60 ppme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“30–60 ppm Ca”
e1“optimum for red pine seedlings managed under similar cultural conditions”
Claim · model-written summary
Optimum red pine seedling Mg was 15–35 ppm.
- Taxon
- red pinePinus resinosae1
- Outcome
- Mge0
- Value
- 15–35 ppme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“15–35 ppm Mg”
e1“optimum for red pine seedlings managed under similar cultural conditions”
Claim · model-written summary
Optimum growing medium conductivity was 1.0–2.2 dS/m.
- Taxon
- red pinePinus resinosae1
- Outcome
- electrical conductivitye0
- Value
- 1.0–2.2 dS/me0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“electrical conductivity of 1.0–2.2 dS/m”
e1“optimum for red pine seedlings managed under similar cultural conditions”