Abstract
The interest in cultivated plants that produce high-quality raw materials with a wide application spectrum has increased. The aim of the present study was to determine the impact of different doses of nitrogen fertilizer on physiological processes of hemp plants and to evaluate its effect on several yield parameters, including seed and fiber yield and quality. The efficiency of different nitrogen supply was evaluated both in controlled and field conditions using hemp cultivar of Latvian origin ‘Pūriņi’, possibly suitable for local conditions. Yield parameters of hemp in field conditions varied both by years and by treatments. Additional nitrogen supply had positive effect on plant height, while no siginificant difference between various doses of nitrogen supplied was observed. Additional nitrogen supply had negative effect on hemp fiber content in 2008 and 2009, and no significant effect in 2010. Seed yield ranged from 1050 to 2557 kg ha –1 , depending both on particular climatic conditions and the rate of additonal fertilization. The yield significantly increased in the N +60 treatment in all years in comparison to control plants. Hemp seed oil content was not significantly affected by additional nitrogen fertilization. A high proportion of linoleic acid in hempseed oil was found, followed by α-linolenic acid, oleic acid and palmitic acid. In laboratory conditions, increase in both leaf nitrogen concentration and chlorophyll content in hemp plants, additionally fertilized with nitrogen, did not depend on the particular dose. Additional nitrogen fertilization significantly affected different aspects of photochemistry of photosynthesis, as shown by chlorophyll a fluorescence analysis. According to yield data, the hemp cv. ‘Pūriņi’ is well-suited for both seed and fiber production in temperate conditions.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 12
Claim · model-written summary
Additional nitrogen supply had a positive effect on plant height of Cannabis sativa.
- Taxon
- Cannabis sativa
Cannabis sativat0 - Treatment
- Additional nitrogen supplye1
- Outcome
- plant heighte1
- Direction
- positive effecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“productivity of Cannabis sativa under different nitrogen supply”
e1“Yield parameters of hemp in field conditions varied both by years and by treatments. Additional nitrogen supply had positive effect on plant height, while no siginificant difference between various doses of nitrogen supplied was observed. Additional nitrogen supply had negative effect on hemp fiber content in 2008 and 2009, and no significant effect in 2010”
Claim · model-written summary
Various doses of nitrogen supplied did not differ in their effect on Cannabis sativa.
- Taxon
- Cannabis sativaCannabis sativat0
- Treatment
- various doses of nitrogen suppliede1
- Direction
- no siginificant differencee1
Not reportedComparatorOutcome
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“productivity of Cannabis sativa under different nitrogen supply”
e1“Yield parameters of hemp in field conditions varied both by years and by treatments. Additional nitrogen supply had positive effect on plant height, while no siginificant difference between various doses of nitrogen supplied was observed. Additional nitrogen supply had negative effect on hemp fiber content in 2008 and 2009, and no significant effect in 2010”
Claim · model-written summary
Seed yield of hemp ranged from 1050 to 2557 kg ha –1, depending on climatic conditions and fertilization rate.
- Taxon
- Cannabis sativaCannabis sativat0
- Outcome
- Seed yielde2
- Value
- 1050 to 2557 kg ha –1e2
- Qualifier
- depending both on particular climatic conditions and the rate of additonal fertilizatione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“productivity of Cannabis sativa under different nitrogen supply”
e2“Seed yield ranged from 1050 to 2557 kg ha –1 , depending both on particular climatic conditions and the rate of additonal fertilization”
Claim · model-written summary
The yield of Cannabis sativa significantly increased in the N +60 treatment in all years compared with control plants.
- Taxon
- Cannabis sativaCannabis sativat0
- Treatment
- N +60 treatmente3
- Outcome
- yielde3
- Direction
- increasede3
- Qualifier
- in all yearse3
- Comparator
- control plantse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“productivity of Cannabis sativa under different nitrogen supply”
e3“The yield significantly increased in the N +60 treatment in all years in comparison to control plants”
Claim · model-written summary
Additional nitrogen fertilization did not significantly affect hemp seed oil content.
- Taxon
- Cannabis sativaCannabis sativat0
- Treatment
- additional nitrogen fertilizatione4
- Outcome
- seed oil contente4
- Direction
- not significantly affectede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“productivity of Cannabis sativa under different nitrogen supply”
e4“Hemp seed oil content was not significantly affected by additional nitrogen fertilization”
Claim · model-written summary
Linoleic acid was the highest proportion of hempseed oil, followed by alpha-linolenic, oleic and palmitic acid.
- Taxon
- Cannabis sativaCannabis sativat0
- Outcome
- proportion of linoleic acid in hempseed oile5
- Qualifier
- followed by α-linolenic acid, oleic acid and palmitic acide5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“productivity of Cannabis sativa under different nitrogen supply”
e5“A high proportion of linoleic acid in hempseed oil was found, followed by α-linolenic acid, oleic acid and palmitic acid”
Claim · model-written summary
Additional nitrogen fertilization increased leaf nitrogen concentration and chlorophyll content in hemp under laboratory conditions, regardless of dose.
- Taxon
- Cannabis sativaCannabis sativat0
- Treatment
- additionally fertilized with nitrogene6
- Outcome
- leaf nitrogen concentration and chlorophyll contente6
- Direction
- increasee6
- Qualifier
- did not depend on the particular dosee6
- Setting
- laboratory conditionse6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“productivity of Cannabis sativa under different nitrogen supply”
e6“In laboratory conditions, increase in both leaf nitrogen concentration and chlorophyll content in hemp plants, additionally fertilized with nitrogen, did not depend on the particular dose”
Claim · model-written summary
Additional nitrogen fertilization significantly affected aspects of photochemistry of photosynthesis as shown by chlorophyll a fluorescence.
- Taxon
- Cannabis sativaCannabis sativat0
- Treatment
- Additional nitrogen fertilizatione7
- Outcome
- different aspects of photochemistry of photosynthesise7
- Qualifier
- as shown by chlorophyll a fluorescence analysise7
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“productivity of Cannabis sativa under different nitrogen supply”
e7“Additional nitrogen fertilization significantly affected different aspects of photochemistry of photosynthesis, as shown by chlorophyll a fluorescence analysis”
Claim · model-written summary
According to yield data, hemp cultivar Pūriņi is well-suited for seed and fiber production in temperate conditions.
- Taxon
- hemp
Cannabis sativa subsp. sativae0 - Outcome
- well-suited for both seed and fiber productione0
- Setting
- temperate conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“According to yield data, the hemp cv. ‘Pūriņi’ is well-suited for both seed and fiber production in temperate conditions”
Claim · model-written summary
Yield parameters of hemp in field conditions varied by years and by treatments.
- Taxon
- hempCannabis sativa subsp. sativae1
- Outcome
- Yield parameterse1
- Qualifier
- varied both by years and by treatmentse1
- Setting
- field conditionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“productivity of Cannabis sativa under different nitrogen supply”
e1“Yield parameters of hemp in field conditions varied both by years and by treatments. Additional nitrogen supply had positive effect on plant height, while no siginificant difference between various doses of nitrogen supplied was observed. Additional nitrogen supply had negative effect on hemp fiber content in 2008 and 2009, and no significant effect in 2010”
Claim · model-written summary
Additional nitrogen supply had a negative effect on hemp fiber content in 2008 and 2009.
- Taxon
- Cannabis sativaCannabis sativat0
- Treatment
- Additional nitrogen supplye1
- Outcome
- hemp fiber contente1
- Direction
- negative effecte1
- Qualifier
- in 2008 and 2009e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“productivity of Cannabis sativa under different nitrogen supply”
e1“Yield parameters of hemp in field conditions varied both by years and by treatments. Additional nitrogen supply had positive effect on plant height, while no siginificant difference between various doses of nitrogen supplied was observed. Additional nitrogen supply had negative effect on hemp fiber content in 2008 and 2009, and no significant effect in 2010”
Claim · model-written summary
Additional nitrogen supply had no significant effect on hemp fiber content in 2010.
- Taxon
- Cannabis sativaCannabis sativat0
- Treatment
- Additional nitrogen supplye1
- Outcome
- hemp fiber contente1
- Direction
- no significant effecte1
- Qualifier
- in 2010e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“productivity of Cannabis sativa under different nitrogen supply”
e1“Yield parameters of hemp in field conditions varied both by years and by treatments. Additional nitrogen supply had positive effect on plant height, while no siginificant difference between various doses of nitrogen supplied was observed. Additional nitrogen supply had negative effect on hemp fiber content in 2008 and 2009, and no significant effect in 2010”
The same questions in other papers
nitrogen · physiology: pigments · Cannabis sativaPositive and negative results
1 in the opposite direction
- negative
fertilization · quality: oil · Cannabis sativaPositive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- no effect
1 paper more in this group
See all 5 papers →nitrogen · quality: grain · Cannabis sativaPositive and negative results
2 papers in the same direction as this paper · 4 in the opposite direction
- positive
- positive
- positive
3 papers more in this group
See all 7 papers →nitrogen · growth · Cannabis sativaPositive and negative results
10 papers in the same direction as this paper · 3 in the opposite direction
- negative
- positive
- positive
10 papers more in this group
See all 14 papers →fertilization · physiology: pigments · Cannabis sativaResults agree
4 papers in the same direction as this paper
- positive
- positive
- positive
1 paper more in this group
See all 5 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.