Abstract
In 1985-88, a 25-yr-old Scots pine forest in Netherlands was limed and fertilized with P, K and Mg in a factoral design. This paper addresses effects of these treatments on foliar nutrient concentrations and tree growth. Stem volume increments of individual trees were measured. Average annual volume growth was estimated to be about 16 msuperscript 3/ha, which may be a slight underestimation. P and K showed increased foliar concentrations immediately after treatment and were the only elements that significantly increased volume growth in 1988-91. Additional annual volume growth of individual trees brought about by P and K corresponded with 0.9 and 2.2 msuperscript 3/ha, respectively. Foliar Mg and Ca increased later and insignificantly reduced and increased volume growth, respectively. Lime and Mg applications tended to lower foliar N. When absolute foliar concentrations and element ratios were compared to Dutch and German standards, it appeared that application of some of these standards in present research would not always have given a fully correct prediction of growth responses to nutrient additions.
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Claims 9
Claim · model-written summary
P and K fertilization increased foliar nutrient concentrations in the Scots pine stand immediately after treatment.
- Taxon
- Scots pine
Pinus sylvestrist0 - Treatment
- P and Ke0
- Outcome
- foliar concentrationse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Scots pine (Pinus sylvestris)”
e0“P and K showed increased foliar concentrations immediately after treatment”
Claim · model-written summary
P and K were the only elements that significantly increased volume growth of Scots pine in 1988-91.
- Taxon
- Scots pinePinus sylvestrist0
- Treatment
- P and Ke0
- Outcome
- volume growthe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Scots pine (Pinus sylvestris)”
e0“P and K showed increased foliar concentrations immediately after treatment and were the only elements that significantly increased volume growth in 1988-91”
Claim · model-written summary
P fertilization brought about an additional annual volume growth of 0.9 m3/ha in individual Scots pine trees.
- Taxon
- Scots pinePinus sylvestrist0
- Treatment
- Pe0
- Outcome
- annual volume growthe0
- Direction
- Additionale0
- Value
- 0.9e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Scots pine (Pinus sylvestris)”
e0“Additional annual volume growth of individual trees brought about by P and K corresponded with 0.9 and 2.2 msuperscript 3/ha, respectively”
Claim · model-written summary
K fertilization brought about an additional annual volume growth of 2.2 m3/ha in individual Scots pine trees.
- Taxon
- Scots pinePinus sylvestrist0
- Treatment
- Ke0
- Outcome
- annual volume growthe0
- Direction
- Additionale0
- Value
- 2.2e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Scots pine (Pinus sylvestris)”
e0“Additional annual volume growth of individual trees brought about by P and K corresponded with 0.9 and 2.2 msuperscript 3/ha, respectively”
Claim · model-written summary
Mg application insignificantly reduced volume growth of Scots pine.
- Taxon
- Scots pinePinus sylvestrist0
- Treatment
- Mge0
- Outcome
- volume growthe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Scots pine (Pinus sylvestris)”
e0“Foliar Mg and Ca increased later and insignificantly reduced and increased volume growth, respectively”
Claim · model-written summary
Ca application insignificantly increased volume growth of Scots pine.
- Taxon
- Scots pinePinus sylvestrist0
- Treatment
- Cae0
- Outcome
- volume growthe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Scots pine (Pinus sylvestris)”
e0“Foliar Mg and Ca increased later and insignificantly reduced and increased volume growth, respectively”
Claim · model-written summary
Lime and Mg applications tended to lower foliar N in Scots pine.
- Taxon
- Scots pinePinus sylvestrist0
- Treatment
- Lime and Mg applicationse0
- Outcome
- foliar Ne0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Scots pine (Pinus sylvestris)”
e0“Lime and Mg applications tended to lower foliar N”
Claim · model-written summary
Average annual volume growth of the Scots pine stand was estimated at about 16 m3/ha.
- Taxon
- Scots pinePinus sylvestrist0
- Outcome
- Average annual volume growthe0
- Value
- about 16 msuperscript 3/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Scots pine (Pinus sylvestris)”
e0“Average annual volume growth was estimated to be about 16 msuperscript 3/ha”
Claim · model-written summary
Applying some Dutch and German foliar standards to this stand would not always have correctly predicted growth responses to nutrient additions.
Not reportedTaxon
Verbatim
e0“absolute foliar concentrations and element ratios were compared to Dutch and German standards”
e1“application of some of these standards in present research would not always have given a fully correct prediction of growth responses to nutrient additions”
The same questions in other papers
magnesium atom · growth · Pinus sylvestris (Scots pine)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
calcium atom · growth · Pinus sylvestris (Scots pine)Results agree
1 paper in the same direction as this paper
- negative
phosphorus · growth · Pinus sylvestris (Scots pine)Positive and negative results
1 in the opposite direction
- no effect
potassium · growth · Pinus sylvestris (Scots pine)Positive and negative results
1 in the opposite direction
- negative
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.