Abstract
In this paper,a main cultivar of sugar beet(Beta Vulgaris L.),KWS0143,was used as material to study the effects of nitrate nitrogen fertilization on nitrate reductase(NR) and nitrite reductase(NiR) activities,photosynthetic rate and total content of chlorophyll.There were four nitrogen levels(N 0,60,120 and 180 kg/ha).The relationships between nitrogen level,NR activity(NRA) and NiR activity(NiRA) were discussed.The results show that the dynamic change of photosynthesis rate is a single peak curve,while the changes of NRA,NiRA and total content of chlorophyll are double peak curves.The peaks of the changing curve of total content of chlorophyll are earlier than those of NRA,and the peaks of NRA are earlier than those of NiRA.The photosynthesis rate,total content of chlorophyll,NRA and NiRA are significantly increased under the nitrogen application amount of 120 kg/ha.Compared with 120 kg/ha,the photosynthesis rate and total content of cholorophyllre are not obviously changed under the nitrogen application amount of 180 kg/ha,while to some extent,NRA and NiRA are improved.In this experiment,sugar beet yield is increased with the increase of nitrogen level,while the rate of sugar content is decreased.The highest sugar yield is obtained under the nitrogen application amount of 120 kg/ha.
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Claims 10
Claim · model-written summary
The photosynthesis rate of sugar beet follows a single-peak curve over time.
- Taxon
- sugar beet
Beta vulgaris subsp. vulgarise0 - Outcome
- the dynamic change of photosynthesis ratee1
- Qualifier
- single peak curvee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In this paper,a main cultivar of sugar beet(Beta Vulgaris L.),KWS0143,was used as material”
e1“the dynamic change of photosynthesis rate is a single peak curve”
Claim · model-written summary
NRA, NiRA and total chlorophyll content of sugar beet change along double-peak curves over time.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Outcome
- the changes of NRA,NiRA and total content of chlorophylle2
- Qualifier
- double peak curvese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In this paper,a main cultivar of sugar beet(Beta Vulgaris L.),KWS0143,was used as material”
e2“the changes of NRA,NiRA and total content of chlorophyll are double peak curves”
Claim · model-written summary
The chlorophyll content peaks earlier than NRA, and NRA peaks earlier than NiRA in sugar beet.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Outcome
- peakse3
- Qualifier
- earlier than those of NRAe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In this paper,a main cultivar of sugar beet(Beta Vulgaris L.),KWS0143,was used as material”
e3“The peaks of the changing curve of total content of chlorophyll are earlier than those of NRA,and the peaks of NRA are earlier than those of NiRA”
Claim · model-written summary
Under 120 kg/ha nitrogen, photosynthesis rate and total chlorophyll content of sugar beet significantly increased.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- nitrogen application amount of 120 kg/hae4
- Outcome
- photosynthesis rate,total content of chlorophylle4
- Direction
- significantly increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In this paper,a main cultivar of sugar beet(Beta Vulgaris L.),KWS0143,was used as material”
e4“The photosynthesis rate,total content of chlorophyll,NRA and NiRA are significantly increased under the nitrogen application amount of 120 kg/ha”
Claim · model-written summary
Under 120 kg/ha nitrogen, NRA and NiRA of sugar beet significantly increased.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- nitrogen application amount of 120 kg/hae4
- Outcome
- NRA and NiRAe4
- Direction
- significantly increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In this paper,a main cultivar of sugar beet(Beta Vulgaris L.),KWS0143,was used as material”
e4“The photosynthesis rate,total content of chlorophyll,NRA and NiRA are significantly increased under the nitrogen application amount of 120 kg/ha”
Claim · model-written summary
Under 180 kg/ha nitrogen, photosynthesis rate of sugar beet was not obviously changed compared with 120 kg/ha.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- nitrogen application amount of 180 kg/hae5
- Outcome
- photosynthesis ratee5
- Direction
- not obviously changede5
- Comparator
- 120 kg/hae5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In this paper,a main cultivar of sugar beet(Beta Vulgaris L.),KWS0143,was used as material”
e5“Compared with 120 kg/ha,the photosynthesis rate and total content of cholorophyllre are not obviously changed under the nitrogen application amount of 180 kg/ha”
Claim · model-written summary
Under 180 kg/ha nitrogen, NRA and NiRA of sugar beet improved to some extent compared with 120 kg/ha.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- nitrogen application amount of 180 kg/hae5
- Outcome
- NRA and NiRAe6
- Direction
- improvede6
- Qualifier
- to some extente6
- Comparator
- 120 kg/hae5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In this paper,a main cultivar of sugar beet(Beta Vulgaris L.),KWS0143,was used as material”
e5“Compared with 120 kg/ha,the photosynthesis rate and total content of cholorophyllre are not obviously changed under the nitrogen application amount of 180 kg/ha”
e6“while to some extent,NRA and NiRA are improved”
Claim · model-written summary
Sugar beet yield increased with increasing nitrogen level.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- nitrogen levele7
- Outcome
- sugar beet yielde7
- Direction
- increasede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In this paper,a main cultivar of sugar beet(Beta Vulgaris L.),KWS0143,was used as material”
e7“sugar beet yield is increased with the increase of nitrogen level”
Claim · model-written summary
Sugar content rate of sugar beet decreased with increasing nitrogen level.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- nitrogen levele7
- Outcome
- the rate of sugar contente7
- Direction
- decreasede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In this paper,a main cultivar of sugar beet(Beta Vulgaris L.),KWS0143,was used as material”
e7“sugar beet yield is increased with the increase of nitrogen level,while the rate of sugar content is decreased”
Claim · model-written summary
Highest sugar yield of sugar beet was obtained under 120 kg/ha nitrogen.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- nitrogen application amount of 120 kg/hae5
- Outcome
- sugar yielde5
- Direction
- higheste5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In this paper,a main cultivar of sugar beet(Beta Vulgaris L.),KWS0143,was used as material”
e5“The highest sugar yield is obtained under the nitrogen application amount of 120 kg/ha”
The same questions in other papers
nitrogen · quality: sugar starch · Beta vulgaris (beet)Results differ
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- negative
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141 papers in the same direction as this paper · 16 in the opposite direction · 3 reporting no difference from an alternative
- negative
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See all 161 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.