Abstract
Questing for the measures of controlling soil nitrogen supply is the key problem of reducing nicotine concentration of upper leaves and improving holistic quality of flue-cured tobacco leaves.In situ incubation experiment was carried out to study the effects of rice straw incorporation on nitrogen mineralization and quality of tobacco leaves on paddy-upland rotation soil.The experiment showed that rice straw incorporation improved the ability of soil nitrogen supply,but the effects were different under different rice straw incorporation manners.Rice straw mulching markedly accelerated soil nitrogen mineralization in vigorous growing period,but plowing rice straw into soil had better promotion effects on nitrogen mineralization during maturation.Under rice straw mulching and plowing conditions,the accumulation quantities of mineralized nitrogen were 139 kg/hm2 and 112 kg/hm2 in the whole growth period,which increased 20.4 % and 12.2 % respectively than control.Fromabove,rice straw mulching was more efficient on promoting soil nitrogen mineralization.While rice straw incorporation increased soil nitrogen mineralization,both rice straw mulching and plowing evidently reduced nitrogen and nicotine concentration and markedly increased total sugar and reductive sugar content of upper leaves.There was little difference between effects of two rice straw incorporation manners on quality of upper leaves.The concentration of total nitrogen and nicotine in two treatments reduced about 18% and 17% than control,and content of total sugar and reductive sugar increased about 23% and 19%.The experiment indicated that rice straw incorporation improved the quality of upper leaves,but had little effect on quality of middle leaves.
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Claims 12
Claim · model-written summary
Rice straw incorporation improved the ability of the paddy-upland rotation soil to supply nitrogen, with effects differing by incorporation manner.
- Taxon
- flue-cured tobaccot0
- Treatment
- rice straw incorporatione0
- Outcome
- ability of soil nitrogen supplye0
- Direction
- improvede0
Not reportedComparator
Verbatim
e0“rice straw incorporation improved the ability of soil nitrogen supply”
t0“flue-cured tobacco”
Claim · model-written summary
Rice straw mulching markedly accelerated soil nitrogen mineralization in the vigorous growing period.
- Taxon
- flue-cured tobaccot0
- Treatment
- Rice straw mulchinge0
- Outcome
- soil nitrogen mineralizatione0
- Direction
- acceleratede0
- Qualifier
- vigorous growing periode0
Not reportedComparator
Verbatim
e0“Rice straw mulching markedly accelerated soil nitrogen mineralization in vigorous growing period”
t0“flue-cured tobacco”
Claim · model-written summary
Plowing rice straw into soil had better promotion effects on nitrogen mineralization during maturation.
- Taxon
- flue-cured tobaccot0
- Treatment
- plowing rice straw into soile0
- Outcome
- nitrogen mineralizatione0
- Direction
- better promotion effectse0
- Qualifier
- during maturatione0
Not reportedComparator
Verbatim
e0“plowing rice straw into soil had better promotion effects on nitrogen mineralization during maturation”
t0“flue-cured tobacco”
Claim · model-written summary
Under rice straw mulching, accumulated mineralized nitrogen over the whole growth period was 139 kg/hm2, 20.4% higher than control.
Verbatim
e0“Under rice straw mulching and plowing conditions,the accumulation quantities of mineralized nitrogen were 139 kg/hm2 and 112 kg/hm2 in the whole growth period,which increased 20.4 % and 12.2 % respectively than control”
t0“flue-cured tobacco”
Claim · model-written summary
Under rice straw plowing, accumulated mineralized nitrogen over the whole growth period was 112 kg/hm2, 12.2% higher than control.
Verbatim
e0“Under rice straw mulching and plowing conditions,the accumulation quantities of mineralized nitrogen were 139 kg/hm2 and 112 kg/hm2 in the whole growth period,which increased 20.4 % and 12.2 % respectively than control”
t0“flue-cured tobacco”
Claim · model-written summary
Rice straw mulching was more efficient than plowing at promoting soil nitrogen mineralization.
- Taxon
- flue-cured tobaccot0
- Treatment
- rice straw mulchinge0
- Outcome
- promoting soil nitrogen mineralizatione0
- Direction
- more efficiente0
Not reportedComparator
Verbatim
e0“rice straw mulching was more efficient on promoting soil nitrogen mineralization”
t0“flue-cured tobacco”
Claim · model-written summary
Rice straw mulching and plowing reduced total nitrogen concentration in upper leaves by about 18% relative to control.
Verbatim
e0“both rice straw mulching and plowing evidently reduced nitrogen and nicotine concentration and markedly increased total sugar and reductive sugar content of upper leaves”
e1“The concentration of total nitrogen and nicotine in two treatments reduced about 18% and 17% than control,and content of total sugar and reductive sugar increased about 23% and 19%”
t0“flue-cured tobacco”
Claim · model-written summary
Rice straw mulching and plowing reduced nicotine concentration in upper leaves by about 17% relative to control.
Verbatim
e0“both rice straw mulching and plowing evidently reduced nitrogen and nicotine concentration and markedly increased total sugar and reductive sugar content of upper leaves”
e1“The concentration of total nitrogen and nicotine in two treatments reduced about 18% and 17% than control,and content of total sugar and reductive sugar increased about 23% and 19%”
t0“flue-cured tobacco”
Claim · model-written summary
Rice straw mulching and plowing increased total sugar content of upper leaves by about 23% relative to control.
Verbatim
e0“both rice straw mulching and plowing evidently reduced nitrogen and nicotine concentration and markedly increased total sugar and reductive sugar content of upper leaves”
e1“The concentration of total nitrogen and nicotine in two treatments reduced about 18% and 17% than control,and content of total sugar and reductive sugar increased about 23% and 19%”
t0“flue-cured tobacco”
Claim · model-written summary
Rice straw mulching and plowing increased reductive sugar content of upper leaves by about 19% relative to control.
Verbatim
e0“both rice straw mulching and plowing evidently reduced nitrogen and nicotine concentration and markedly increased total sugar and reductive sugar content of upper leaves”
e1“The concentration of total nitrogen and nicotine in two treatments reduced about 18% and 17% than control,and content of total sugar and reductive sugar increased about 23% and 19%”
t0“flue-cured tobacco”
Claim · model-written summary
There was little difference between the two rice straw incorporation manners in their effects on upper leaf quality.
- Taxon
- flue-cured tobaccot0
- Treatment
- two rice straw incorporation mannerse0
- Outcome
- quality of upper leavese0
- Direction
- little differencee0
Not reportedComparator
Verbatim
e0“There was little difference between effects of two rice straw incorporation manners on quality of upper leaves”
t0“flue-cured tobacco”
Claim · model-written summary
Rice straw incorporation had little effect on the quality of middle leaves.
- Taxon
- flue-cured tobaccot0
- Treatment
- rice straw incorporatione0
- Outcome
- quality of middle leavese0
- Direction
- little effecte0
Not reportedComparator
Verbatim
e0“rice straw incorporation improved the quality of upper leaves,but had little effect on quality of middle leaves”
t0“flue-cured tobacco”
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8 of 9 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.