Abstract
【Objective】In order to understand the absorption and accumulation dynamics law of N nutrient in sugarcane to provide references for scientific and rational application of nitrogen fertilizer, the present experiment was conducted to study effects of different nitrogen levels on the activities of key enzyme in nitrogen metabolism and the contents of related active substances at four different growth stages of 3 sugarcane varieties. 【 Method 】 Using 3 sugarcane varieties viz., ROC22, GT11 and GXB9 as materials, the physiological and biochemical indexes related to nitrogen metabolism at different growth stages were determined under 3 levels of urea fertilization(150, 300 and 600 kg/ha) in the field experiment by using split plot design with two factors in 2013(plant cane) and 2014(ratoon cane). 【Result】The results showed that activities of nitrate reductase(NR), glutamine synthetase(GS), glutamate oxaloacetate transaminase(GOT) and glutamate pyruvate transaminase(GPT) increased with the increase of nitrogen levels. The contents of soluble protein and free amino acids increased within a certain range(150-300 kg/ha) with the increase of nitrogen level, which no longer increased beyond a certain range. While the contents of soluble sugar and nitrate nitrogen were decreased with the increase of nitrogen level within a certain range(150-300 kg/ha). 【Conclusion】Under the urea application rates of 150-300 kg/ha,the nitrogen metabolism of sugarcane is significantly enhanced with the increase of nitrogen level. The sugarcane variety GXB9 has stronger regulative and adaptive ability in low nitrogen environment than other two varieties.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. 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 6
Claim · model-written summary
Nitrate reductase and glutamine synthetase activities increased with nitrogen level in sugarcane.
- Taxon
- sugarcanet0
- Material
- ROC22, GT11 and GXB9e3
- Treatment
- urea fertilization(150, 300 and 600 kg/ha)e2
- Outcome
- activities of nitrate reductase(NR), glutamine synthetase(GS)e1
- Direction
- increasede1
- Setting
- field experimente2
Not reportedComparator
Verbatim
t0“three sugarcane varieties”
e1“activities of nitrate reductase(NR), glutamine synthetase(GS), glutamate oxaloacetate transaminase(GOT) and glutamate pyruvate transaminase(GPT) increased with the increase of nitrogen levels”
e2“under 3 levels of urea fertilization(150, 300 and 600 kg/ha) in the field experiment by using split plot design”
e3“Using 3 sugarcane varieties viz., ROC22, GT11 and GXB9 as materials”
Claim · model-written summary
Glutamate oxaloacetate transaminase and glutamate pyruvate transaminase activities increased with nitrogen level in sugarcane.
- Taxon
- sugarcanet0
- Material
- ROC22, GT11 and GXB9e3
- Treatment
- urea fertilization(150, 300 and 600 kg/ha)e2
- Outcome
- glutamate oxaloacetate transaminase(GOT) and glutamate pyruvate transaminase(GPT)e1
- Direction
- increasede1
- Setting
- field experimente2
Not reportedComparator
Verbatim
t0“three sugarcane varieties”
e1“activities of nitrate reductase(NR), glutamine synthetase(GS), glutamate oxaloacetate transaminase(GOT) and glutamate pyruvate transaminase(GPT) increased with the increase of nitrogen levels”
e2“under 3 levels of urea fertilization(150, 300 and 600 kg/ha) in the field experiment by using split plot design”
e3“Using 3 sugarcane varieties viz., ROC22, GT11 and GXB9 as materials”
Claim · model-written summary
Soluble protein and free amino acid contents increased with nitrogen level within 150-300 kg/ha and no longer increased beyond that range.
- Taxon
- sugarcanet0
- Material
- ROC22, GT11 and GXB9e3
- Treatment
- increase of nitrogen levele4
- Outcome
- contents of soluble protein and free amino acidse4
- Direction
- increasede4
- Qualifier
- within a certain range(150-300 kg/ha)e4
Not reportedComparator
Verbatim
t0“three sugarcane varieties”
e4“The contents of soluble protein and free amino acids increased within a certain range(150-300 kg/ha) with the increase of nitrogen level, which no longer increased beyond a certain range”
e2“under 3 levels of urea fertilization(150, 300 and 600 kg/ha) in the field experiment by using split plot design”
e3“Using 3 sugarcane varieties viz., ROC22, GT11 and GXB9 as materials”
Claim · model-written summary
Soluble sugar and nitrate nitrogen contents decreased with nitrogen level within 150-300 kg/ha.
- Taxon
- sugarcanet0
- Material
- ROC22, GT11 and GXB9e3
- Treatment
- increase of nitrogen levele5
- Outcome
- contents of soluble sugar and nitrate nitrogene5
- Direction
- decreasede5
- Qualifier
- within a certain range(150-300 kg/ha)e5
Not reportedComparator
Verbatim
t0“three sugarcane varieties”
e5“While the contents of soluble sugar and nitrate nitrogen were decreased with the increase of nitrogen level within a certain range(150-300 kg/ha)”
e2“under 3 levels of urea fertilization(150, 300 and 600 kg/ha) in the field experiment by using split plot design”
e3“Using 3 sugarcane varieties viz., ROC22, GT11 and GXB9 as materials”
Claim · model-written summary
Under urea at 150-300 kg/ha, nitrogen metabolism of sugarcane was significantly enhanced as nitrogen level increased.
- Taxon
- sugarcanee6
- Treatment
- urea application rates of 150-300 kg/hae6
- Outcome
- nitrogen metabolisme6
- Direction
- significantly enhancede6
Not reportedComparator
Verbatim
e6“Under the urea application rates of 150-300 kg/ha,the nitrogen metabolism of sugarcane is significantly enhanced with the increase of nitrogen level”
Claim · model-written summary
Sugarcane variety GXB9 had stronger regulative and adaptive ability than the other two varieties in low nitrogen.
Verbatim
t0“three sugarcane varieties”
e7“The sugarcane variety GXB9 has stronger regulative and adaptive ability in low nitrogen environment than other two varieties”
The same questions in other papers
nitrogen · molecular: metabolites · Saccharum officinarum (sugarcane)Positive and negative results
9 papers in the same direction as this paper · 10 in the opposite direction · 1 reporting no difference from an alternative
- positive
- negative
- negative
17 papers more in this group
See all 21 papers →fertilization · molecular: metabolites · Saccharum officinarum (sugarcane)Positive and negative results
24 papers in the same direction as this paper · 8 in the opposite direction · 1 reporting no difference from an alternative
- negative
- no effect
- no effect
30 papers more in this group
See all 34 papers →nitrogen · physiology: enzyme activity · Saccharum officinarum (sugarcane)Results agree
4 papers in the same direction as this paper
- positive
- positive
- positive
1 paper more in this group
See all 5 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.