Abstract
Industrial hemp (Cannabis sativa L.) has become a well-known crop in western Canada in recent years, but insufficient information is available on its nutrient requirements for optimum yield. Our objective was to confirm the response of two hemp cultivars to increasing levels of nitrogen (N), phosphorus (P) and sulphur (S) in various sites in the province of Saskatchewan, during 2006-2008. Increasing N rates significantly increased plant height, biomass, and seed yield, when data were averaged across all sites (location-years), reaching maximum values at about 150 kg N ha -1 of applied N fertilizer. The cultivar Crag was taller and produced greater biomass than the cultivar Finola over all levels of N fertilizer rate. The minimum rate of N fertilizer to achieve maximum height/biomass for Crag, relative to Finola, was 5 kg N ha -1 lower for height (Finola: 163 kg N ha -1 ) but 9 kg N ha -1 higher for biomass (Finola: 180 kg N ha -1 ). Finola seed yield was more responsive to progressively greater rates of N fertilizer. Consequently, maximum seed yield (plateau) was 27% greater for Finola than for Crag, but 198 kg N ha -1 of fertilizer was required to achieve this maximum yield vs. 175 kg N ha -1 for Crag. There was generally little or no response to P fertilizer, on soils with adequate available P, or to S fertilizer on an S-deficient soil. Results from this study indicate that N fertilizer rate and cultivar choice are important management parameters to consider for industrial hemp production.Key words: Fertilizer, hemp cultivars, nitrogen, phosphorus, sulphur, soil extractable P, soil nitrate-N
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Claims 11
Claim · model-written summary
Increasing N rates significantly increased hemp plant height, biomass and seed yield across sites.
- Taxon
- hemp
Cannabis sativa subsp. sativae0 - Treatment
- Increasing N ratese1
- Outcome
- plant height, biomass, and seed yielde1
- Direction
- increasede1
- Qualifier
- reaching maximum values at about 150 kg N ha -1 of applied N fertilizere1
- Setting
- province of Saskatchewane0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Our objective was to confirm the response of two hemp cultivars to increasing levels of nitrogen (N), phosphorus (P) and sulphur (S) in various sites in the province of Saskatchewan, during 2006-2008”
e1“Increasing N rates significantly increased plant height, biomass, and seed yield, when data were averaged across all sites (location-years), reaching maximum values at about 150 kg N ha -1 of applied N fertilizer”
Claim · model-written summary
Cultivar Crag was taller than cultivar Finola over all N rates.
- Taxon
- hempCannabis sativa subsp. sativae0
- Material
- Crage2
- Outcome
- plant heighte1
- Direction
- tallere2
- Qualifier
- over all levels of N fertilizer ratee2
- Comparator
- Finolae2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Our objective was to confirm the response of two hemp cultivars to increasing levels of nitrogen (N), phosphorus (P) and sulphur (S) in various sites in the province of Saskatchewan, during 2006-2008”
e1“Increasing N rates significantly increased plant height, biomass, and seed yield, when data were averaged across all sites (location-years), reaching maximum values at about 150 kg N ha -1 of applied N fertilizer”
e2“The cultivar Crag was taller and produced greater biomass than the cultivar Finola over all levels of N fertilizer rate”
Claim · model-written summary
Cultivar Crag produced greater biomass than cultivar Finola over all N rates.
- Taxon
- hempCannabis sativa subsp. sativae0
- Material
- Crage2
- Outcome
- biomasse2
- Direction
- greatere2
- Qualifier
- over all levels of N fertilizer ratee2
- Comparator
- Finolae2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Our objective was to confirm the response of two hemp cultivars to increasing levels of nitrogen (N), phosphorus (P) and sulphur (S) in various sites in the province of Saskatchewan, during 2006-2008”
e2“The cultivar Crag was taller and produced greater biomass than the cultivar Finola over all levels of N fertilizer rate”
Claim · model-written summary
The minimum N rate to achieve maximum height for Crag was 5 kg N ha -1 lower than for Finola.
- Taxon
- hempCannabis sativa subsp. sativae0
- Material
- Crage3
- Outcome
- minimum rate of N fertilizer to achieve maximum heighte3
- Direction
- lowere3
- Value
- 5 kg N ha -1e3
- Qualifier
- Finola: 163 kg N ha -1e3
- Comparator
- Finolae3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Our objective was to confirm the response of two hemp cultivars to increasing levels of nitrogen (N), phosphorus (P) and sulphur (S) in various sites in the province of Saskatchewan, during 2006-2008”
e3“The minimum rate of N fertilizer to achieve maximum height/biomass for Crag, relative to Finola, was 5 kg N ha -1 lower for height (Finola: 163 kg N ha -1 ) but 9 kg N ha -1 higher for biomass (Finola: 180 kg N ha -1 )”
Claim · model-written summary
The minimum N rate to achieve maximum biomass for Crag was 9 kg N ha -1 higher than for Finola.
- Taxon
- hempCannabis sativa subsp. sativae0
- Material
- Crage3
- Outcome
- minimum rate of N fertilizer to achieve maximum height/biomasse3
- Direction
- highere3
- Value
- 9 kg N ha -1e3
- Qualifier
- Finola: 180 kg N ha -1e3
- Comparator
- Finolae3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Our objective was to confirm the response of two hemp cultivars to increasing levels of nitrogen (N), phosphorus (P) and sulphur (S) in various sites in the province of Saskatchewan, during 2006-2008”
e3“The minimum rate of N fertilizer to achieve maximum height/biomass for Crag, relative to Finola, was 5 kg N ha -1 lower for height (Finola: 163 kg N ha -1 ) but 9 kg N ha -1 higher for biomass (Finola: 180 kg N ha -1 )”
Claim · model-written summary
Finola seed yield was more responsive to progressively greater N rates than Crag.
- Taxon
- hempCannabis sativa subsp. sativae0
- Material
- Finolae4
- Treatment
- progressively greater rates of N fertilizere4
- Outcome
- seed yielde4
- Direction
- more responsivee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Our objective was to confirm the response of two hemp cultivars to increasing levels of nitrogen (N), phosphorus (P) and sulphur (S) in various sites in the province of Saskatchewan, during 2006-2008”
e4“Finola seed yield was more responsive to progressively greater rates of N fertilizer”
Claim · model-written summary
Maximum seed yield of Finola was 27% greater than that of Crag.
- Taxon
- hempCannabis sativa subsp. sativae0
- Material
- Finolae5
- Outcome
- maximum seed yield (plateau)e5
- Direction
- greatere5
- Value
- 27%e5
- Comparator
- Crage5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Our objective was to confirm the response of two hemp cultivars to increasing levels of nitrogen (N), phosphorus (P) and sulphur (S) in various sites in the province of Saskatchewan, during 2006-2008”
e5“maximum seed yield (plateau) was 27% greater for Finola than for Crag, but 198 kg N ha -1 of fertilizer was required to achieve this maximum yield vs. 175 kg N ha -1 for Crag”
Claim · model-written summary
Finola required 198 kg N ha -1 to reach its maximum seed yield, versus 175 kg N ha -1 for Crag.
- Taxon
- hempCannabis sativa subsp. sativae0
- Material
- Finolae5
- Outcome
- required to achieve this maximum yielde5
- Direction
- higherinferrede5
- Value
- 198 kg N ha -1e5
- Qualifier
- 175 kg N ha -1e5
- Comparator
- Crage5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Our objective was to confirm the response of two hemp cultivars to increasing levels of nitrogen (N), phosphorus (P) and sulphur (S) in various sites in the province of Saskatchewan, during 2006-2008”
e5“maximum seed yield (plateau) was 27% greater for Finola than for Crag, but 198 kg N ha -1 of fertilizer was required to achieve this maximum yield vs. 175 kg N ha -1 for Crag”
Claim · model-written summary
P fertilizer generally produced little or no response on soils with adequate available P.
- Taxon
- hempCannabis sativa subsp. sativae0
- Treatment
- P fertilizere6
- Outcome
- responsee6
- Qualifier
- on soils with adequate available Pe6
- Setting
- province of Saskatchewane0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Our objective was to confirm the response of two hemp cultivars to increasing levels of nitrogen (N), phosphorus (P) and sulphur (S) in various sites in the province of Saskatchewan, during 2006-2008”
e6“There was generally little or no response to P fertilizer, on soils with adequate available P, or to S fertilizer on an S-deficient soil”
Claim · model-written summary
S fertilizer produced little or no response on an S-deficient soil.
- Taxon
- hempCannabis sativa subsp. sativae0
- Treatment
- S fertilizere6
- Outcome
- responsee6
- Qualifier
- on an S-deficient soile6
- Setting
- province of Saskatchewane0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Our objective was to confirm the response of two hemp cultivars to increasing levels of nitrogen (N), phosphorus (P) and sulphur (S) in various sites in the province of Saskatchewan, during 2006-2008”
e6“There was generally little or no response to P fertilizer, on soils with adequate available P, or to S fertilizer on an S-deficient soil”
Claim · model-written summary
N fertilizer rate and cultivar choice are important management parameters to consider for industrial hemp production.
Verbatim
e7“Results from this study indicate that N fertilizer rate and cultivar choice are important management parameters to consider for industrial hemp production”
The same questions in other papers
nitrogen · yield · Cannabis sativaPositive and negative results
14 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
12 papers more in this group
See all 16 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.