Abstract
Terrestrial ecosystems worldwide are experiencing increasing atmospheric nitrogen (N) deposition because of fossil-fuel combustion and fertilizer applications. As a C4 feed crop, sweet sorghum (Sorghum bicolor L.) is widely used in the arid region of China since its high sugar content, good palatability and high yield. However, impacts of atmospheric N deposition on production of sweet sorghum are poorly understood in arid land ecosystems where soils are typically low in plant available N. At Hui Autonomous Region, Ningxia, China, a complete random block design was used to study the effects of four levels of N additions (45, 169, 197, and 224 kg ha-1 year-1) on sorghum, node number, stem diameter, leaf number, plant height, yield per plant, dry matter, and sugar Brix of stem. Nitrogen application significantly affected the above parameters. When the amount of N applied was 224 kg ha-1 year-1, the plant height (mean ± standard deviation, 256.9 cm ± 10.7, n=9), stem diameter (16.9 mm ± 1.1 ,n=9), number of leaf (10.8 ± 1.3, n=6) and node (4.9 ± 0.4, n=9), and dry matter per unit area (1.48 t ha-1 ± 0.3, n=9) was highest. While N application did not affect sugar Brix of stem. Therefore, N deposition plays a linearly positive role in enhancing the productivity of sweet sorghum in the arid region of China. Keywords: Agronomic traits, C4 plant, Feed crop, Nitrogen addition
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Claims 8
Claim · model-written summary
Nitrogen application significantly affected the measured sweet sorghum parameters
SorghumNot reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“on sorghum, node number”
e2“Nitrogen application significantly affected the above parameters”
Claim · model-written summary
At 224 kg ha-1 year-1 N, sweet sorghum plant height was highest at 256.9 cm
- Treatment
- the amount of N applied was 224e2
- Outcome
- plant heighte3
- Direction
- higheste5
- Value
- 256.9 cme4
- Setting
- Hui Autonomous Region, Ningxia, Chinae6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“on sorghum, node number”
e2“When the amount of N applied was 224”
e3“the plant height (mean”
e4“256.9 cm”
e5“was highest”
e6“At Hui Autonomous Region, Ningxia, China”
Claim · model-written summary
At 224 kg ha-1 year-1 N, sweet sorghum stem diameter was highest at 16.9 mm
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“on sorghum, node number”
e2“When the amount of N applied was 224”
e3“stem diameter (16.9 mm”
e5“was highest”
Claim · model-written summary
At 224 kg ha-1 year-1 N, sweet sorghum leaf number was highest at 10.8
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“on sorghum, node number”
e2“When the amount of N applied was 224”
e4“number of leaf (10.8”
e5“was highest”
Claim · model-written summary
At 224 kg ha-1 year-1 N, sweet sorghum node number was highest at 4.9
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“on sorghum, node number”
e2“When the amount of N applied was 224”
e6“node (4.9”
e5“was highest”
Claim · model-written summary
At 224 kg ha-1 year-1 N, sweet sorghum dry matter per unit area was highest at 1.48 t ha
- Treatment
- the amount of N applied was 224e2
- Outcome
- dry matter per unit areae7
- Direction
- higheste5
- Value
- 1.48e7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“on sorghum, node number”
e2“When the amount of N applied was 224”
e7“dry matter per unit area (1.48 t ha”
e5“was highest”
Claim · model-written summary
Nitrogen application did not affect the sugar Brix of sweet sorghum stem
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“on sorghum, node number”
e2“While N application did not affect sugar Brix of stem”
Claim · model-written summary
Nitrogen deposition linearly increases the productivity of sweet sorghum in the arid region of China
- Taxon
- sweet sorghume1
- Treatment
- N depositione1
- Outcome
- productivitye1
- Direction
- increaseinferrede1
- Qualifier
- linearlye1
- Setting
- arid region of Chinae1
Not reportedComparator
Verbatim
e1“Therefore, N deposition plays a linearly positive role in enhancing the productivity of sweet sorghum in the arid region of China”
The same questions in other papers
nitrogen · quality: sugar starch · SorghumResults differ
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See all 15 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.