Abstract
Abstract The suitability of using composted forest-nursery waste as a component in growing medium was studied. Norway spruce [Picea abies (L.) Karst.] seedlings were grown in containers filled with sphagnum peat (100P), forest-nursery waste compost (100C) and in peat mixtures containing 25 or 50% compost by volume (75P25C and 50P50C, respectively). Morphological and chemical characteristics of the seedlings and the water and nutrient contents of the growing media were studied during 22 weeks of nursery cultivation. The seedlings were outplanted the following spring, and the survival and growth were followed for 3 years. Compost additions decreased seedling height, diameter and shoot dry mass, but root dry mass was the same in 100P and 75P25C after nursery cultivation. Foliar nutrient concentrations were optimal in all the seedlings, although foliar nitrogen content was lower the greater the proportion of compost in the medium. Compost additions did not affect the root-egress potential tested before outplanting. The 100P seedlings grew significantly more than the other seedlings during the first summer at the forest site. Thereafter, compost additions did not affect growth, but the final height and diameter were still the lowest in 100C. The results suggest that forest-nursery waste compost has potential to be used as a component of peat-based growing medium. However, specially adjusted nursery-cultivation practices need to be used for compost-containing media.
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Claims 10
Claim · model-written summary
Compost additions decreased seedling height, diameter and shoot dry mass of Norway spruce seedlings in the nursery.
- Taxon
- Norway spruce
Picea abiese1 - Treatment
- Compost additionse2
- Outcome
- seedling height, diameter and shoot dry masse2
- Direction
- decreasede2
- Setting
- nursery cultivatione2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Norway spruce [Picea abies (L.) Karst.] seedlings”
e2“Compost additions decreased seedling height, diameter and shoot dry mass, but root dry mass was the same in 100P and 75P25C after nursery cultivation”
Claim · model-written summary
Root dry mass of Norway spruce seedlings was the same in 100P and 75P25C media after nursery cultivation.
- Taxon
- Norway sprucePicea abiese1
- Treatment
- 75P25Ce2
- Outcome
- root dry masse2
- Direction
- was the samee2
- Comparator
- 100Pe2
- Setting
- nursery cultivatione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Norway spruce [Picea abies (L.) Karst.] seedlings”
e2“Compost additions decreased seedling height, diameter and shoot dry mass, but root dry mass was the same in 100P and 75P25C after nursery cultivation”
Claim · model-written summary
The 100P seedlings grew significantly more than the other seedlings during the first summer at the forest site.
- Taxon
- Norway sprucePicea abiese1
- Treatment
- 100Pe5
- Outcome
- grewe5
- Direction
- significantly moree5
- Qualifier
- during the first summere5
- Comparator
- the other seedlingse5
- Setting
- forest sitee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Norway spruce [Picea abies (L.) Karst.] seedlings”
e5“The 100P seedlings grew significantly more than the other seedlings during the first summer at the forest site”
Claim · model-written summary
After outplanting, compost additions did not affect Norway spruce growth.
- Taxon
- Norway sprucePicea abiese1
- Treatment
- compost additionse6
- Outcome
- growthe6
- Direction
- did not affecte6
- Qualifier
- Thereaftere6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Norway spruce [Picea abies (L.) Karst.] seedlings”
e6“Thereafter, compost additions did not affect growth, but the final height and diameter were still the lowest in 100C”
Claim · model-written summary
Final height and diameter of Norway spruce were still the lowest in the 100C medium.
- Taxon
- Norway sprucePicea abiese1
- Treatment
- 100Ce6
- Outcome
- final height and diametere6
- Direction
- the loweste6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Norway spruce [Picea abies (L.) Karst.] seedlings”
e6“Thereafter, compost additions did not affect growth, but the final height and diameter were still the lowest in 100C”
Claim · model-written summary
Compost additions did not affect the root-egress potential of Norway spruce seedlings before outplanting.
- Taxon
- Norway sprucePicea abiese1
- Treatment
- Compost additionse4
- Outcome
- root-egress potentiale4
- Direction
- did not affecte4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Norway spruce [Picea abies (L.) Karst.] seedlings”
e4“Compost additions did not affect the root-egress potential tested before outplanting”
Claim · model-written summary
Foliar nutrient concentrations of Norway spruce seedlings were optimal in all seedlings.
- Taxon
- Norway sprucePicea abiese1
- Outcome
- Foliar nutrient concentrationse3
- Qualifier
- optimal in all the seedlingse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Norway spruce [Picea abies (L.) Karst.] seedlings”
e3“Foliar nutrient concentrations were optimal in all the seedlings, although foliar nitrogen content was lower the greater the proportion of compost in the medium”
Claim · model-written summary
Foliar nitrogen content of Norway spruce was lower with a greater proportion of compost in the medium.
- Taxon
- Norway sprucePicea abiese1
- Treatment
- proportion of composte3
- Outcome
- foliar nitrogen contente3
- Direction
- lowere3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Norway spruce [Picea abies (L.) Karst.] seedlings”
e3“Foliar nutrient concentrations were optimal in all the seedlings, although foliar nitrogen content was lower the greater the proportion of compost in the medium”
Claim · model-written summary
Forest-nursery waste compost is suggested as a component of peat-based growing medium for Norway spruce.
- Taxon
- Norway sprucePicea abiese1
- Treatment
- forest-nursery waste composte7
- Outcome
- a component of peat-based growing mediume7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Norway spruce [Picea abies (L.) Karst.] seedlings”
e7“The results suggest that forest-nursery waste compost has potential to be used as a component of peat-based growing medium”
Claim · model-written summary
Specially adjusted nursery-cultivation practices are needed for compost-containing growing media.
- Taxon
- Norway sprucePicea abiese1
- Outcome
- specially adjusted nursery-cultivation practicese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Norway spruce [Picea abies (L.) Karst.] seedlings”
e2“However, specially adjusted nursery-cultivation practices need to be used for compost-containing media”
The same questions in other papers
fertilization · growth · Picea abies (Norway spruce)Positive and negative results
6 papers in the same direction as this paper · 12 in the opposite direction
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- positive
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See all 19 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.