Abstract
Through the field experiment and indoor chemical analysis,the influence of different N,P, K fertilizer rates on nitrogen,potassium,calcium,magnesium,total sugar,reducing sugar and starch content in tobacco was researched. The results showed that when the P2 O5 varied from 0 to 112. 5 kg· ha -1 ,phosphorus had no obvious effect on the absorption of calcium,when the application of P2 O5 was over 112. 5 kg·ha -1 ,phosphorus could inhibit tobacco absorption of calcium elements. When the K2 O varied from 0 to 270 kg·ha -1 ,potassium could promote the accumulation of nitrogen element in tobacco leaf,but when the application of K2 O was over 270 kg·ha -1 ,Potassium would restrain the nitrogen element accumulation. As the nitrogen fertilizer varied from 0 ～ 112. 5 kg·ha -1 ,nitrogen had no obvious effect on the accumulation of total sugar and reducing sugar,when the application of nitrogen was over 112. 5 kg·ha -1 ,nitrogen would reduce the total sugar and reducing sugar accumulation. So it can be concluded that nitrogen fertilizer has obvious effect on the accumulation nitrogen,potassium and calcium content of tobacco leaf,and P and K have different functions in different fertilization range. Nitrogen has obvious effect on the accumulation of sugar in leaves,and the application of P and K fertilizers has obvious effect on the accumulation of carbohydrates.
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Claims 8
Claim · model-written summary
Phosphorus up to 112.5 kg per hectare had no obvious effect on tobacco calcium absorption.
- Taxon
- tobacco
Nicotiana tabacumt0 - Treatment
- P2 O5 varied from 0 to 112. 5 kg· ha -1e0
- Outcome
- absorption of calciume0
- Direction
- no obvious effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when the P2 O5 varied from 0 to 112. 5 kg· ha -1 ,phosphorus had no obvious effect on the absorption of calcium”
t0“tobacco”
Claim · model-written summary
Phosphorus above 112.5 kg per hectare inhibited tobacco calcium absorption.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- application of P2 O5 was over 112. 5 kg·ha -1e0
- Outcome
- tobacco absorption of calcium elementse0
- Direction
- inhibite0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when the application of P2 O5 was over 112. 5 kg·ha -1 ,phosphorus could inhibit tobacco absorption of calcium elements”
Claim · model-written summary
Potassium through 270 kg per hectare promoted nitrogen accumulation in tobacco leaves.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- K2 O varied from 0 to 270 kg·ha -1e0
- Outcome
- accumulation of nitrogen element in tobacco leafe0
- Direction
- promotee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When the K2 O varied from 0 to 270 kg·ha -1 ,potassium could promote the accumulation of nitrogen element in tobacco leaf”
Claim · model-written summary
Potassium above 270 kg per hectare restrained tobacco leaf nitrogen accumulation.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- application of K2 O was over 270 kg·ha -1e0
- Outcome
- nitrogen element accumulatione0
- Direction
- restraine0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when the application of K2 O was over 270 kg·ha -1 ,Potassium would restrain the nitrogen element accumulation”
t0“tobacco”
Claim · model-written summary
Nitrogen through 112.5 kg per hectare had no obvious effect on total and reducing sugar accumulation.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- nitrogen fertilizer varied from 0 ～ 112. 5 kg·ha -1e0
- Outcome
- accumulation of total sugar and reducing sugare0
- Direction
- no obvious effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“As the nitrogen fertilizer varied from 0 ～ 112. 5 kg·ha -1 ,nitrogen had no obvious effect on the accumulation of total sugar and reducing sugar”
t0“tobacco”
Claim · model-written summary
Nitrogen above 112.5 kg per hectare reduced total and reducing sugar accumulation.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- application of nitrogen was over 112. 5 kg·ha -1e0
- Outcome
- total sugar and reducing sugar accumulatione0
- Direction
- reducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when the application of nitrogen was over 112. 5 kg·ha -1 ,nitrogen would reduce the total sugar and reducing sugar accumulation”
t0“tobacco”
Claim · model-written summary
Nitrogen fertilizer had an obvious effect on tobacco leaf nitrogen, potassium and calcium content.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- nitrogen fertilizere0
- Outcome
- nitrogen,potassium and calcium content of tobacco leafe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nitrogen fertilizer has obvious effect on the accumulation nitrogen,potassium and calcium content of tobacco leaf”
Claim · model-written summary
P and K fertilizer application affected leaf carbohydrate accumulation.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- application of P and K fertilizerse0
- Outcome
- accumulation of carbohydratese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the application of P and K fertilizers has obvious effect on the accumulation of carbohydrates”
t0“tobacco”
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See all 40 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.