Abstract
Abstract The illegal status of cannabis ( Cannabis sativa L.) post‐World War II resulted in a lack of research on agricultural practices. However, there is a resurgence of interest in cannabis due to diverse uses such as a rich source of cellulosic/woody fiber and construction uses, seed oil, bioenergy and pharmaceutical properties. The principle of an integrated plant nutrition system (IPNS) is to enable adaptation of plant nutrition and soil fertility management to local site characteristics, attempting to optimize use of inorganic, organic and biological resources. This project investigated the individual and combined use of inorganic, organic and biological fertilizer resources on cannabis before and after a period of moderate water stress. We evaluated the individual and combined effects of commercial synthetic fertilizer, humic acid (HA), manure tea and bioinoculant as inorganic, organic and biological resources, respectively on cannabis growth and physiological parameters. Our hypothesis was that the synergetic effects of HA + biofertilizers would improve cannabis growth. When compared to the control, the application of HA and biofertilizer alone, or in combination, increased plant height, chlorophyll content and photosynthetic efficiency by 55, 8 and 12%, respectively, after water stress. Cannabis biomass of treated plants was rarely different from the control. The combined application of HA + biofertilizer resulted in additive, but not synergistic, increases in measured parameter. Future research should focus on the effects of biostimulants on CBD/THC content due to the potential impact on the production of secondary metabolites in plants under stress.
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Claims 6
Claim · model-written summary
Humic acid and biofertilizer, alone or combined, increased cannabis plant height by 55% relative to the control after water stress.
- Taxon
- Cannabis sativa
Cannabis sativat0 - Treatment
- application of HA and biofertilizer alone, or in combinatione0
- Outcome
- plant heighte0
- Direction
- increasede0
- Value
- 55e0
- Qualifier
- after water stresse0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When compared to the control, the application of HA and biofertilizer alone, or in combination, increased plant height, chlorophyll content and photosynthetic efficiency by 55, 8 and 12%, respectively, after water stress”
t0“Cannabis sativa”
Claim · model-written summary
Humic acid and biofertilizer, alone or combined, increased cannabis chlorophyll content by 8% relative to the control after water stress.
- Taxon
- Cannabis sativaCannabis sativat0
- Treatment
- application of HA and biofertilizer alone, or in combinatione0
- Outcome
- chlorophyll contente0
- Direction
- increasede0
- Value
- 8e0
- Qualifier
- after water stresse0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When compared to the control, the application of HA and biofertilizer alone, or in combination, increased plant height, chlorophyll content and photosynthetic efficiency by 55, 8 and 12%, respectively, after water stress”
t0“Cannabis sativa”
Claim · model-written summary
Humic acid and biofertilizer, alone or combined, increased cannabis photosynthetic efficiency by 12% relative to the control after water stress.
- Taxon
- Cannabis sativaCannabis sativat0
- Treatment
- application of HA and biofertilizer alone, or in combinatione0
- Outcome
- photosynthetic efficiencye0
- Direction
- increasede0
- Value
- 12%e0
- Qualifier
- after water stresse0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When compared to the control, the application of HA and biofertilizer alone, or in combination, increased plant height, chlorophyll content and photosynthetic efficiency by 55, 8 and 12%, respectively, after water stress”
t0“Cannabis sativa”
Claim · model-written summary
Cannabis biomass of treated plants was rarely different from the control.
- Treatment
- treated plantse0
- Outcome
- biomasse0
- Direction
- no_changeinferrede0
- Qualifier
- rarely differente0
- Comparator
- the controle0
CannabisOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cannabis biomass of treated plants was rarely different from the control”
Claim · model-written summary
Combined application of humic acid and biofertilizer resulted in additive, but not synergistic, increases in the measured parameters.
- Taxon
- Cannabis sativaCannabis sativat0
- Treatment
- combined application of HA + biofertilizere0
- Outcome
- increases in measured parametere0
- Direction
- increasese0
- Qualifier
- additive, but not synergistice0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The combined application of HA + biofertilizer resulted in additive, but not synergistic, increases in measured parameter”
t0“Cannabis sativa”
Claim · model-written summary
Future research should focus on the effects of biostimulants on CBD/THC content in cannabis.
- Taxon
- Cannabis sativaCannabis sativat0
- Outcome
- CBD/THC contente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Future research should focus on the effects of biostimulants on CBD/THC content”
t0“Cannabis sativa”
The same questions in other papers
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5 papers in the same direction as this paper · 2 in the opposite direction
- positive
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See all 8 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.