Abstract
The impacts of different growing substrate compositions, consisting of peat (PM), peat substituted with 30% green fibre (G30) and coco coir fibre (CC) growth media, were investigated in regard to the plant height, biomass and floral yield, biomass nitrogen (N) content, root growth, and cannabidiol content (CBD/A) of two phytocannabinoid-rich cannabis genotypes in an indoor pot cultivation system. Genotypes and substrate treatment combinations were randomly allocated to 36 plants according to a Latin square design. The results showed a higher total plant height for PM (39.96 cm), followed by G30 (35.28 cm), and the lowest in CC (31.54 cm). The N content of leaves indicated the highest values for plants grown in G30 (52.24 g kg DW−1), followed by PM (46.75 g kg DW−1) and a significantly lower content for CC (37.00 g kg DW−1). Root length density (RLD) increased by 40% (PM) and 50% (G30), compared to CC treatments, with no significant differences in root dry weight. Both genotypes, Kanada (KAN) and 0.2x, reacted in a genotype-specific manner. KAN indicated a reduced floral yield of plants grown in G30 (4.94 g plant−1) and CC (3.84 g plant−1) compared to PM (8.56 g plant−1). 0.2x indicated stable high floral yields of 9.19 g plant−1 (G30) to 7.90 g plant−1 (CC). Leaf DW increased in PM (5.78 g plant−1) and G30 (5.66 g plant−1) compared to CC (3.30 g plant−1), while CBD/A content remained constant. Due to a higher biomass yield, the CBD/A yield of flowers (549.66 mg plant−1) and leaves (224.16 mg plant−1) revealed 0.2x as an interesting genotype for indoor pot cultivation in a peat-based substrate substituted with 30% green fibres. Overall, the demand for organic green fibres to partly replace fractionated peat showed a genotype-specific option for a homogeneous plant development, with comparable high biomass yields and stable cannabinoid contents compared to a peat containing standard substrate.
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Claims 18
Claim · model-written summary
Plant height was higher for PM than for CC (39.96 cm).
- Taxon
- Cannabis sativa L.
Cannabis sativat0 - Treatment
- PMe0
- Outcome
- total plant heighte0
- Direction
- highere0
- Value
- 39.96 cme0
- Comparator
- CCe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed a higher total plant height for PM (39.96 cm), followed by G30 (35.28 cm), and the lowest in CC (31.54 cm)”
t0“Cannabis sativa L.”
Claim · model-written summary
Plant height for G30 was intermediate, at 35.28 cm, above CC.
- Taxon
- Cannabis sativa L.Cannabis sativat0
- Treatment
- G30e0
- Outcome
- total plant heighte0
- Direction
- higherinferrede0
- Value
- 35.28 cme0
- Comparator
- CCe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed a higher total plant height for PM (39.96 cm), followed by G30 (35.28 cm), and the lowest in CC (31.54 cm)”
t0“Cannabis sativa L.”
Claim · model-written summary
Leaf N content was highest for G30 (52.24 g kg DW−1).
- Taxon
- Cannabis sativa L.Cannabis sativat0
- Organ / stage
- leavese1
- Treatment
- G30e1
- Outcome
- N content of leavese1
- Direction
- higheste1
- Value
- 52.24 g kg DW−1e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The N content of leaves indicated the highest values for plants grown in G30 (52.24 g kg DW−1), followed by PM (46.75 g kg DW−1) and a significantly lower content for CC (37.00 g kg DW−1)”
t0“Cannabis sativa L.”
Claim · model-written summary
Leaf N content for PM (46.75 g kg DW−1) was lower than for G30.
- Taxon
- Cannabis sativa L.Cannabis sativat0
- Organ / stage
- leavese1
- Treatment
- PMe1
- Outcome
- N content of leavese1
- Direction
- lowerinferrede1
- Value
- 46.75 g kg DW−1e1
- Comparator
- G30e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The N content of leaves indicated the highest values for plants grown in G30 (52.24 g kg DW−1), followed by PM (46.75 g kg DW−1) and a significantly lower content for CC (37.00 g kg DW−1)”
t0“Cannabis sativa L.”
Claim · model-written summary
Leaf N content was significantly lower for CC (37.00 g kg DW−1) than for PM.
- Taxon
- Cannabis sativa L.Cannabis sativat0
- Organ / stage
- leavese1
- Treatment
- CCe1
- Outcome
- N content of leavese1
- Direction
- significantly lowere1
- Value
- 37.00 g kg DW−1e1
- Comparator
- PMe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The N content of leaves indicated the highest values for plants grown in G30 (52.24 g kg DW−1), followed by PM (46.75 g kg DW−1) and a significantly lower content for CC (37.00 g kg DW−1)”
t0“Cannabis sativa L.”
Claim · model-written summary
Root length density increased by 40% for PM compared with CC.
- Taxon
- Cannabis sativa L.Cannabis sativat0
- Treatment
- PMe2
- Outcome
- Root length density (RLD)e2
- Direction
- increasede2
- Value
- 40%e2
- Comparator
- CC treatmentse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Root length density (RLD) increased by 40% (PM) and 50% (G30), compared to CC treatments, with no significant differences in root dry weight”
t0“Cannabis sativa L.”
Claim · model-written summary
Root length density increased by 50% for G30 compared with CC.
- Taxon
- Cannabis sativa L.Cannabis sativat0
- Treatment
- G30e2
- Outcome
- Root length density (RLD)e2
- Direction
- increasede2
- Value
- 50%e2
- Comparator
- CC treatmentse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Root length density (RLD) increased by 40% (PM) and 50% (G30), compared to CC treatments, with no significant differences in root dry weight”
t0“Cannabis sativa L.”
Claim · model-written summary
Root dry weight showed no significant difference between substrate treatments.
- Taxon
- Cannabis sativa L.Cannabis sativat0
- Outcome
- root dry weighte2
- Direction
- no significant differencese2
- Comparator
- CC treatmentse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Root length density (RLD) increased by 40% (PM) and 50% (G30), compared to CC treatments, with no significant differences in root dry weight”
t0“Cannabis sativa L.”
Claim · model-written summary
Floral yield of KAN was reduced for G30 (4.94 g plant−1) compared with PM.
- Taxon
- Cannabis sativa L.Cannabis sativat0
- Material
- KANe3
- Treatment
- G30e3
- Outcome
- floral yielde3
- Direction
- reducede3
- Value
- 4.94 g plant−1e3
- Comparator
- PMe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“KAN indicated a reduced floral yield of plants grown in G30 (4.94 g plant−1) and CC (3.84 g plant−1) compared to PM (8.56 g plant−1)”
e7“Both genotypes, Kanada (KAN) and 0.2x, reacted in a genotype-specific manner”
t0“Cannabis sativa L.”
Claim · model-written summary
Floral yield of KAN was reduced for CC (3.84 g plant−1) compared with PM.
- Taxon
- Cannabis sativa L.Cannabis sativat0
- Material
- KANe3
- Treatment
- CCe3
- Outcome
- floral yielde3
- Direction
- reducede3
- Value
- 3.84 g plant−1e3
- Comparator
- PMe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“KAN indicated a reduced floral yield of plants grown in G30 (4.94 g plant−1) and CC (3.84 g plant−1) compared to PM (8.56 g plant−1)”
e7“Both genotypes, Kanada (KAN) and 0.2x, reacted in a genotype-specific manner”
t0“Cannabis sativa L.”
Claim · model-written summary
Genotype 0.2x had stable high floral yields of 9.19 g plant−1 (G30) to 7.90 g plant−1 (CC).
- Taxon
- Cannabis sativa L.Cannabis sativat0
- Material
- 0.2xe5
- Outcome
- floral yieldse5
- Direction
- stable highe5
- Value
- 9.19 g plant−1 (G30) to 7.90 g plant−1 (CC)e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“0.2x indicated stable high floral yields of 9.19 g plant−1 (G30) to 7.90 g plant−1 (CC)”
e7“Both genotypes, Kanada (KAN) and 0.2x, reacted in a genotype-specific manner”
t0“Cannabis sativa L.”
Claim · model-written summary
Leaf dry weight increased for PM (5.78 g plant−1) compared with CC.
- Taxon
- Cannabis sativa L.Cannabis sativat0
- Organ / stage
- Leafe6
- Treatment
- PMe6
- Outcome
- Leaf DWe6
- Direction
- increasede6
- Value
- 5.78 g plant−1e6
- Comparator
- CCe6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Leaf DW increased in PM (5.78 g plant−1) and G30 (5.66 g plant−1) compared to CC (3.30 g plant−1), while CBD/A content remained constant”
t0“Cannabis sativa L.”
Claim · model-written summary
Leaf dry weight increased for G30 (5.66 g plant−1) compared with CC.
- Taxon
- Cannabis sativa L.Cannabis sativat0
- Organ / stage
- Leafe6
- Treatment
- G30e6
- Outcome
- Leaf DWe6
- Direction
- increasede6
- Value
- 5.66 g plant−1e6
- Comparator
- CCe6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Leaf DW increased in PM (5.78 g plant−1) and G30 (5.66 g plant−1) compared to CC (3.30 g plant−1), while CBD/A content remained constant”
t0“Cannabis sativa L.”
Claim · model-written summary
CBD/A content remained constant across substrates.
- Taxon
- Cannabis sativa L.Cannabis sativat0
- Outcome
- CBD/A contente6
- Direction
- remained constante6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Leaf DW increased in PM (5.78 g plant−1) and G30 (5.66 g plant−1) compared to CC (3.30 g plant−1), while CBD/A content remained constant”
t0“Cannabis sativa L.”
Claim · model-written summary
Genotype 0.2x had a CBD/A yield of 549.66 mg plant−1 in flowers.
- Taxon
- Cannabis sativa L.Cannabis sativat0
- Material
- 0.2xe7
- Organ / stage
- flowerse7
- Outcome
- CBD/A yield of flowerse7
- Value
- 549.66 mg plant−1e7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“Due to a higher biomass yield, the CBD/A yield of flowers (549.66 mg plant−1) and leaves (224.16 mg plant−1) revealed 0.2x as an interesting genotype for indoor pot cultivation in a peat-based substrate substituted with 30% green fibres”
t0“Cannabis sativa L.”
Claim · model-written summary
Genotype 0.2x had a CBD/A yield of 224.16 mg plant−1 in leaves.
- Taxon
- Cannabis sativa L.Cannabis sativat0
- Material
- 0.2xe7
- Organ / stage
- leavese7
- Outcome
- CBD/A yielde7
- Value
- 224.16 mg plant−1e7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“Due to a higher biomass yield, the CBD/A yield of flowers (549.66 mg plant−1) and leaves (224.16 mg plant−1) revealed 0.2x as an interesting genotype for indoor pot cultivation in a peat-based substrate substituted with 30% green fibres”
t0“Cannabis sativa L.”
Claim · model-written summary
Genotype 0.2x is an interesting genotype for indoor pot cultivation in a peat-based substrate with 30% green fibres.
- Taxon
- Cannabis sativa L.Cannabis sativat0
- Material
- 0.2xe7
- Outcome
- interesting genotype for indoor pot cultivatione7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“Due to a higher biomass yield, the CBD/A yield of flowers (549.66 mg plant−1) and leaves (224.16 mg plant−1) revealed 0.2x as an interesting genotype for indoor pot cultivation in a peat-based substrate substituted with 30% green fibres”
t0“Cannabis sativa L.”
Claim · model-written summary
Green fibre substrates gave comparable high biomass yields and stable cannabinoid contents compared with standard peat.
- Taxon
- Cannabis sativa L.Cannabis sativat0
- Treatment
- green fibrese7
- Outcome
- cannabinoid contentse7
- Qualifier
- genotype-specifice7
- Comparator
- a peat containing standard substratee7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“Overall, the demand for organic green fibres to partly replace fractionated peat showed a genotype-specific option for a homogeneous plant development, with comparable high biomass yields and stable cannabinoid contents compared to a peat containing standard substrate”
t0“Cannabis sativa L.”
The same questions in other papers
growing medium · yield · Cannabis sativaPositive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- 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.