Abstract
Seeds of industrial hemp have high nutritional and healthcare value, which can be further improved by proper cultivation methods. Biochemical properties of hemp seeds that are beneficial for human use can be modulated through variation of the molar ratio between the inorganic nitrogen and phosphorus supplied with the nutrient medium, as well as by creating a moderate water deficit during controlled irrigation. The aim of this study was to investigate the influence of two N:P ratios (i.e. 8 mM nitrogen as nitrate to 2 mM phosphorus as phosphate, and 3 mM nitrogen to 6 mM phosphorus), combined with two water supply regimes (sufficient and insufficient) on vegetative growth parameters, seed production, seed oil, protein, vitamin E, iron, zinc and manganese content of two industrial hemp cultivars (‘Jubileu’ and ‘Zenit’). The experiments were performed in a greenhouse, under controlled conditions. Even if plants receiving a lower N:P ratio and lower water supply had a decreased growth index and the shoot fresh weight was smaller, no statistically significant difference could be registered in the seed production of the different experimental variants. The oil content of seeds could be increased by a lower N:P ratio and by water deficit, while seed protein content was higher upon a higher N:P ratio and upon water shortage, for both cultivars. The highest vitamin E content of hemp seed oil was found when plants were subjected to the combined influence of lowered N:P ratio and water insufficiency. The iron content of seeds showed no changes between the different experimental variants. In seeds of the ‘Jubileu’ variety the zinc content was increased by water shortage when the N:P ratio was lower, while the highest manganese content was measured when plants received sufficient water and lowered N:P ratio. As for the ‘Zenit’ variety, the highest zinc and manganese content of seeds was obtained when plants received through the nutrient solution 8 mM nitrate and 2 mM phosphate (i.e. the N:P ratio was 4:1). The findings may contribute to optimization of hemp cultivation, in a cost-effective and environmental-friendly approach, for the purpose of production of higher quality seeds for human and animal consumption, as well as for the cosmetic industry.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. 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 10
Claim · model-written summary
Lower N:P ratio combined with lower water supply decreased the growth index of hemp.
- Taxon
- hemp
Cannabis sativa subsp. sativat0 - Treatment
- lower N:P ratio and lower water supplye2
- Outcome
- growth indexe2
- Direction
- decreasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“hemp (Cannabis sativa L.)”
e2“Even if plants receiving a lower N:P ratio and lower water supply had a decreased growth index and the shoot fresh weight was smaller, no statistically significant difference could be registered in the seed production of the different experimental variants”
Claim · model-written summary
Lower N:P ratio combined with lower water supply made shoot fresh weight of hemp smaller.
- Taxon
- hempCannabis sativa subsp. sativat0
- Treatment
- lower N:P ratio and lower water supplye2
- Outcome
- shoot fresh weighte2
- Direction
- smallere2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“hemp (Cannabis sativa L.)”
e2“Even if plants receiving a lower N:P ratio and lower water supply had a decreased growth index and the shoot fresh weight was smaller, no statistically significant difference could be registered in the seed production of the different experimental variants”
Claim · model-written summary
N:P ratio and water supply variants did not change seed production of hemp.
- Taxon
- hempCannabis sativa subsp. sativat0
- Treatment
- different experimental variantse3
- Outcome
- seed productione3
- Direction
- no_changeinferrede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“hemp (Cannabis sativa L.)”
e3“no statistically significant difference could be registered in the seed production of the different experimental variants”
Claim · model-written summary
A lower N:P ratio and water deficit could increase seed oil content of hemp in a greenhouse.
- Taxon
- hempCannabis sativa subsp. sativat0
- Treatment
- lower N:P ratio and by water deficite4
- Outcome
- oil content of seedse4
- Direction
- increasede4
- Setting
- greenhousee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“hemp (Cannabis sativa L.)”
e1“The experiments were performed in a greenhouse, under controlled conditions”
e4“The oil content of seeds could be increased by a lower N:P ratio and by water deficit”
Claim · model-written summary
A higher N:P ratio and water shortage increased seed protein content of both hemp cultivars.
- Taxon
- hempCannabis sativa subsp. sativat0
- Material
- ‘Jubileu’ and ‘Zenit’e0
- Treatment
- higher N:P ratio and upon water shortagee5
- Outcome
- seed protein contente5
- Direction
- highere5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“hemp (Cannabis sativa L.)”
e0“content of two industrial hemp cultivars (‘Jubileu’ and ‘Zenit’)”
e5“while seed protein content was higher upon a higher N:P ratio and upon water shortage, for both cultivars”
Claim · model-written summary
The highest vitamin E content of hemp seed oil occurred under lowered N:P ratio combined with water insufficiency.
- Taxon
- hempCannabis sativa subsp. sativat0
- Treatment
- combined influence of lowered N:P ratio and water insufficiencye6
- Outcome
- vitamin E content of hemp seed oile6
- Direction
- higheste6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“hemp (Cannabis sativa L.)”
e6“The highest vitamin E content of hemp seed oil was found when plants were subjected to the combined influence of lowered N:P ratio and water insufficiency”
Claim · model-written summary
Iron content of hemp seeds did not change between the experimental variants.
- Taxon
- hempCannabis sativa subsp. sativat0
- Treatment
- different experimental variantse7
- Outcome
- iron content of seedse7
- Direction
- no changese7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“hemp (Cannabis sativa L.)”
e7“The iron content of seeds showed no changes between the different experimental variants”
Claim · model-written summary
In Jubileu seeds, water shortage increased zinc content when the N:P ratio was lower.
- Taxon
- hempCannabis sativa subsp. sativat0
- Material
- ‘Jubileu’e1
- Treatment
- water shortage when the N:P ratio was lowere1
- Outcome
- zinc contente1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“hemp (Cannabis sativa L.)”
e1“In seeds of the ‘Jubileu’ variety the zinc content was increased by water shortage when the N:P ratio was lower”
Claim · model-written summary
In Jubileu seeds, the highest manganese content occurred with sufficient water and a lowered N:P ratio.
- Taxon
- hempCannabis sativa subsp. sativat0
- Material
- ‘Jubileu’e1
- Treatment
- sufficient water and lowered N:P ratioe2
- Outcome
- manganese contente2
- Direction
- higheste2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“hemp (Cannabis sativa L.)”
e1“In seeds of the ‘Jubileu’ variety the zinc content was increased by water shortage when the N:P ratio was lower”
e2“while the highest manganese content was measured when plants received sufficient water and lowered N:P ratio”
Claim · model-written summary
In Zenit seeds, the highest zinc and manganese content occurred with 8 mM nitrate and 2 mM phosphate (N:P ratio 4:1).
- Taxon
- hempCannabis sativa subsp. sativat0
- Material
- ‘Zenit’e1
- Treatment
- 8 mM nitrate and 2 mM phosphatee1
- Outcome
- zinc and manganese contente1
- Direction
- higheste1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“hemp (Cannabis sativa L.)”
e1“As for the ‘Zenit’ variety, the highest zinc and manganese content of seeds was obtained when plants received through the nutrient solution 8 mM nitrate and 2 mM phosphate”
The same questions in other papers
phosphorus · nutrient: content · Cannabis sativaPositive and negative results
1 in the opposite direction
- negative
nitrogen · nutrient: content · Cannabis sativaPositive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
irrigation · growth · Cannabis sativaPositive and negative results
2 in the opposite direction
- positive
- 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.