Abstract
Controlled-release fertilizers, applied to the root zone of 1-0 plug Douglas-fir (Pseudotsugamenziesii Mirb. Franco) seedlings at planting, stimulated shoot and root growth in the following two growing seasons. Stem unit length was increased in the first growth flush after treatment, and a higher proportion of fertilized seedlings had a second growth flush that year. Fertilizing increased the number of needle primordia formed in the overwintered bud in the late summer and fall of the 1st year after treatment and increased the number of lateral buds formed the following spring, but did not affect the length of stem units elongated in the first growth flush of the 2nd year after treatment. Shoot–root ratio was not altered abnormally by fertilizing. Fertilizing increased the number and in some cases the diameter of lateral roots in the root system. Position of fertilizer placement did not alter root system symmetry in terms of the distribution of numbers of roots over 12 root zones.
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Claims 9
Claim · model-written summary
Controlled-release fertilizers stimulated shoot and root growth of Douglas-fir seedlings in the two following growing seasons.
- Taxon
- Douglas-fir
Pseudotsuga menziesiie1 - Treatment
- Controlled-release fertilizerse1
- Outcome
- shoot and root growthe1
- Direction
- stimulatede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Controlled-release fertilizers, applied to the root zone of 1-0 plug Douglas-fir (Pseudotsugamenziesii Mirb. Franco) seedlings at planting, stimulated shoot and root growth in the following two growing seasons”
Claim · model-written summary
Stem unit length increased in the first growth flush after fertilizer treatment.
- Taxon
- Douglas-firPseudotsuga menziesiie1
- Organ / stage
- first growth flushe2
- Treatment
- Controlled-release fertilizerse1
- Outcome
- Stem unit lengthe2
- Direction
- increasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Controlled-release fertilizers, applied to the root zone of 1-0 plug Douglas-fir (Pseudotsugamenziesii Mirb. Franco) seedlings at planting, stimulated shoot and root growth in the following two growing seasons”
e2“Stem unit length was increased in the first growth flush after treatment”
Claim · model-written summary
A higher proportion of fertilized seedlings had a second growth flush in the same year.
- Taxon
- Douglas-firPseudotsuga menziesiie1
- Treatment
- Controlled-release fertilizerse1
- Outcome
- second growth flushe2
- Direction
- higher proportione2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Controlled-release fertilizers, applied to the root zone of 1-0 plug Douglas-fir (Pseudotsugamenziesii Mirb. Franco) seedlings at planting, stimulated shoot and root growth in the following two growing seasons”
e2“a higher proportion of fertilized seedlings had a second growth flush that year”
Claim · model-written summary
Fertilizing increased the number of needle primordia in the overwintered bud.
- Taxon
- Douglas-firPseudotsuga menziesiie1
- Organ / stage
- overwintered bude3
- Treatment
- Fertilizinge3
- Outcome
- number of needle primordiae3
- Direction
- increasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Controlled-release fertilizers, applied to the root zone of 1-0 plug Douglas-fir (Pseudotsugamenziesii Mirb. Franco) seedlings at planting, stimulated shoot and root growth in the following two growing seasons”
e3“Fertilizing increased the number of needle primordia formed in the overwintered bud in the late summer and fall of the 1st year after treatment”
Claim · model-written summary
Fertilizing increased the number of lateral buds formed the following spring.
- Taxon
- Douglas-firPseudotsuga menziesiie1
- Treatment
- Controlled-release fertilizerse1
- Outcome
- number of lateral budse3
- Direction
- increasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Controlled-release fertilizers, applied to the root zone of 1-0 plug Douglas-fir (Pseudotsugamenziesii Mirb. Franco) seedlings at planting, stimulated shoot and root growth in the following two growing seasons”
e3“and increased the number of lateral buds formed the following spring”
Claim · model-written summary
Fertilizing did not affect the length of stem units elongated in the first growth flush of the second year.
- Taxon
- Douglas-firPseudotsuga menziesiie1
- Treatment
- Controlled-release fertilizerse1
- Outcome
- length of stem units elongatede4
- Direction
- did not affecte4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Controlled-release fertilizers, applied to the root zone of 1-0 plug Douglas-fir (Pseudotsugamenziesii Mirb. Franco) seedlings at planting, stimulated shoot and root growth in the following two growing seasons”
e4“but did not affect the length of stem units elongated in the first growth flush of the 2nd year after treatment”
Claim · model-written summary
Shoot-root ratio was not altered abnormally by fertilizing.
- Taxon
- Douglas-firPseudotsuga menziesiie1
- Treatment
- fertilizinge5
- Outcome
- Shoot–root ratioe5
- Direction
- not alterede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Controlled-release fertilizers, applied to the root zone of 1-0 plug Douglas-fir (Pseudotsugamenziesii Mirb. Franco) seedlings at planting, stimulated shoot and root growth in the following two growing seasons”
e5“Shoot–root ratio was not altered abnormally by fertilizing”
Claim · model-written summary
Fertilizing increased the number of lateral roots, and in some cases their diameter.
- Taxon
- Douglas-firPseudotsuga menziesiie1
- Treatment
- Fertilizinge6
- Outcome
- lateral rootse6
- Direction
- increasede6
- Qualifier
- in some cases the diametere6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Controlled-release fertilizers, applied to the root zone of 1-0 plug Douglas-fir (Pseudotsugamenziesii Mirb. Franco) seedlings at planting, stimulated shoot and root growth in the following two growing seasons”
e6“Fertilizing increased the number and in some cases the diameter of lateral roots in the root system”
Claim · model-written summary
The position of fertilizer placement did not alter root system symmetry.
- Taxon
- Douglas-firPseudotsuga menziesiie1
- Treatment
- Position of fertilizer placemente7
- Outcome
- root system symmetrye7
- Direction
- did not altere7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Controlled-release fertilizers, applied to the root zone of 1-0 plug Douglas-fir (Pseudotsugamenziesii Mirb. Franco) seedlings at planting, stimulated shoot and root growth in the following two growing seasons”
e7“Position of fertilizer placement did not alter root system symmetry in terms of the distribution of numbers of roots over 12 root zones”
The same questions in other papers
fertilization · growth · Pseudotsuga menziesii (Douglas-fir)Positive and negative results
11 papers in the same direction as this paper · 1 in the opposite direction
- positive
- positive
- no effect
9 papers more in this group
See all 13 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.