Abstract
Abstract Hemp ( Cannabis sativa L.) is one of the world's oldest and most diversely cultivated plants, but legal constraints and a lack of agronomic rules have curtailed its production. This study aimed to determine the optimum nitrogen (N) application rate and harvesting stage for hemp yield in terms of seed, fiber, and stem. Treatments included (1) five nitrogen application rates (control [N0], 60 kg ha −1 [N60], 120 kg ha −1 [N120], 180 kg ha −1 [N180], and 240 kg ha −1 [N240]) and (2) three harvesting stages: before flowering (HS1), during flowering (HS2), and at the end of flowering (HS3). A 2‐year field experiment was conducted with three replicates. Harvest stages were randomly distributed over N rates in both years. The following agronomic parameters were evaluated: plant height, stem diameter (lower, middle, upper), number of leaves/plant, leaflet width, leaflet length, dry stem yield, fiber yield, and seed yield. The highest stem yield and fiber yield were obtained in the 240 kg ha −1 N treatment, and also the highest fiber (bast) yield and dry stem (hurd fiber) were obtained flowering and at the end of the flowering stages, respectively. When nitrogen application rate was increased from 0 to 240 kg ha −1 , plant height, stem, and fiber yields increased by 48%, 65% and 57%, respectively. Agronomic parameters increased significantly ( p < 0.01) when the harvesting time was moved from “before flowering” to “at the end of flowering.”
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Claims 8
Claim · model-written summary
Stem yield was highest at 240 kg ha −1 nitrogen.
- Taxon
- industrial hemp (Cannabis sativa L.)
Cannabis sativat0 - Treatment
- 240 kg ha −1 N treatmente0
- Outcome
- stem yielde0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest stem yield and fiber yield were obtained in the 240 kg ha −1 N treatment”
t0“industrial hemp (Cannabis sativa L.)”
Claim · model-written summary
Fiber yield was highest at 240 kg ha −1 nitrogen.
- Taxon
- industrial hemp (Cannabis sativa L.)Cannabis sativat0
- Treatment
- 240 kg ha −1 N treatmente0
- Outcome
- fiber yielde0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest stem yield and fiber yield were obtained in the 240 kg ha −1 N treatment”
t0“industrial hemp (Cannabis sativa L.)”
Claim · model-written summary
Bast fiber yield was highest during flowering.
- Taxon
- industrial hemp (Cannabis sativa L.)Cannabis sativat0
- Treatment
- floweringe0
- Outcome
- fiber (bast) yielde0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest fiber (bast) yield and dry stem (hurd fiber) were obtained flowering and at the end of the flowering stages, respectively”
t0“industrial hemp (Cannabis sativa L.)”
Claim · model-written summary
Dry stem hurd fiber was highest at the end of flowering.
- Taxon
- industrial hemp (Cannabis sativa L.)Cannabis sativat0
- Treatment
- at the end of the flowering stagese0
- Outcome
- dry stem (hurd fiber)e0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest fiber (bast) yield and dry stem (hurd fiber) were obtained flowering and at the end of the flowering stages, respectively”
t0“industrial hemp (Cannabis sativa L.)”
Claim · model-written summary
Raising nitrogen from 0 to 240 kg ha −1 increased plant height by 48%.
- Taxon
- industrial hemp (Cannabis sativa L.)Cannabis sativat0
- Treatment
- 240 kg ha −1e0
- Outcome
- plant heighte0
- Direction
- increasede0
- Value
- 48%e0
- Comparator
- 0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When nitrogen application rate was increased from 0 to 240 kg ha −1 , plant height, stem, and fiber yields increased by 48%, 65% and 57%, respectively”
t0“industrial hemp (Cannabis sativa L.)”
Claim · model-written summary
Raising nitrogen from 0 to 240 kg ha −1 increased stem yield by 65%.
- Taxon
- industrial hemp (Cannabis sativa L.)Cannabis sativat0
- Treatment
- 240 kg ha −1e0
- Outcome
- steme0
- Direction
- increasede0
- Value
- 65%e0
- Comparator
- 0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When nitrogen application rate was increased from 0 to 240 kg ha −1 , plant height, stem, and fiber yields increased by 48%, 65% and 57%, respectively”
t0“industrial hemp (Cannabis sativa L.)”
Claim · model-written summary
Raising nitrogen from 0 to 240 kg ha −1 increased fiber yield by 57%.
- Taxon
- industrial hemp (Cannabis sativa L.)Cannabis sativat0
- Treatment
- 240 kg ha −1e0
- Outcome
- fiber yieldse0
- Direction
- increasede0
- Value
- 57%e0
- Comparator
- 0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When nitrogen application rate was increased from 0 to 240 kg ha −1 , plant height, stem, and fiber yields increased by 48%, 65% and 57%, respectively”
t0“industrial hemp (Cannabis sativa L.)”
Claim · model-written summary
Agronomic parameters increased significantly when harvest moved from before flowering to the end of flowering.
- Taxon
- industrial hemp (Cannabis sativa L.)Cannabis sativat0
- Treatment
- at the end of floweringe0
- Outcome
- Agronomic parameterse0
- Direction
- increasede0
- Comparator
- before floweringe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Agronomic parameters increased significantly ( p < 0.01) when the harvesting time was moved from “before flowering” to “at the end of flowering.””
t0“industrial hemp (Cannabis sativa L.)”
The same questions in other papers
nitrogen · quality: grain · Cannabis sativaPositive and negative results
3 papers in the same direction as this paper · 2 in the opposite direction · 1 reporting no difference from an alternative
- negative
- no effect
- no effect
3 papers more in this group
See all 7 papers →nitrogen · yield · Cannabis sativaPositive and negative results
14 papers in the same direction as this paper · 1 in the opposite direction
- positive
- positive
- positive
12 papers more in this group
See all 16 papers →stage · quality: grain · Cannabis sativaResults agree
1 paper in the same direction as this paper
- positive
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.