Abstract
Tobacco is traditionally an industrial crop that is used for manufacturing cigarettes. However, due to health concerns and global tobacco control movements, alternative uses of tobacco are urgently needed to support tobacco farmers and vendors. Tobacco is also an oilseed crop with an oil yield ranging from 30% to 40 of its dry weight. However, there is still no information on the effects of nitrogen application on tobacco seed yield and seed oil production. The objective of this study was to evaluate the effects of N fertilization (90, 120, 150, and 180 kg·ha −1 N) on the seed yield, oil content, fatty acid composition, and seed germination characteristics of tobacco plants at two locations. The results showed that applying increasing amounts of N to tobacco plants significantly increased their total seed yields and oil content. Nitrogen application also modified the fatty acid composition of the seed oil, as more unsaturated fatty acids were produced under the increasing N application rate treatments than under the control. Moreover, increasing the N application rate generally significantly increased the yields of individual fatty acids as well. Nevertheless, the increased seed oil content and altered fatty acid composition did not affect seed germination traits, as the seed germination potential and rate showed no obvious change among treatments or the control. The height and size of the tobacco plants also increased with the increasing N application rate, which would be beneficial for increasing biomass production for bioenergy. This study shows for the first time the feasibility of increasing the seed and oil yields and modifying the fatty acid composition of tobacco plants by increasing N addition.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc-nd. 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 8
Claim · model-written summary
Increasing N significantly increased total seed yields.
- Taxon
- tobacco
Nicotiana tabacume0 - Treatment
- increasing amounts of Ne0
- Outcome
- total seed yieldse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“applying increasing amounts of N to tobacco plants significantly increased their total seed yields and oil content.”
Claim · model-written summary
Increasing N significantly increased oil content.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- increasing amounts of Ne0
- Outcome
- oil contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“applying increasing amounts of N to tobacco plants significantly increased their total seed yields and oil content.”
Claim · model-written summary
Increasing N produced more unsaturated fatty acids than control.
- Taxon
- Nicotiana tabacumNicotiana tabacumt0
- Treatment
- increasing N application rate treatmentse0
- Outcome
- unsaturated fatty acidse0
- Direction
- moree0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“more unsaturated fatty acids were produced under the increasing N application rate treatments than under the control.”
t0“Nicotiana tabacum”
Claim · model-written summary
Increasing N generally significantly increased individual fatty acid yields.
- Taxon
- Nicotiana tabacumNicotiana tabacumt0
- Treatment
- increasing the N application ratee0
- Outcome
- yields of individual fatty acidse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing the N application rate generally significantly increased the yields of individual fatty acids as well.”
t0“Nicotiana tabacum”
Claim · model-written summary
Seed germination potential showed no obvious change among nitrogen treatments or control.
- Taxon
- Nicotiana tabacumNicotiana tabacumt0
- Treatment
- treatmentse0
- Outcome
- seed germination potentiale0
- Direction
- no obvious changee0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed germination potential and rate showed no obvious change among treatments or the control.”
t0“Nicotiana tabacum”
Claim · model-written summary
Seed germination rate showed no obvious change among nitrogen treatments or control.
- Taxon
- Nicotiana tabacumNicotiana tabacumt0
- Treatment
- treatmentse0
- Outcome
- ratee0
- Direction
- no obvious changee0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed germination potential and rate showed no obvious change among treatments or the control.”
t0“Nicotiana tabacum”
Claim · model-written summary
Tobacco plant height increased with nitrogen rate.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- increasing N application ratee0
- Outcome
- heighte0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The height and size of the tobacco plants also increased with the increasing N application rate”
Claim · model-written summary
Tobacco plant size increased with nitrogen rate.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- increasing N application ratee0
- Outcome
- sizee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The height and size of the tobacco plants also increased with the increasing N application rate”
The same questions in other papers
nitrogen · growth · Nicotiana tabacum (tobacco)Positive and negative results
55 papers in the same direction as this paper · 17 in the opposite direction
- negative
- negative
- negative
69 papers more in this group
See all 73 papers →nitrogen · quality: oil · Nicotiana tabacum (tobacco)Results 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.