Abstract
The location tests for returning rice straw to field plus applying decomposition agent were carried out in multi-year tobacco-rice rotating tobacco field in Changting county during 2011 ~ 2012. The results indicated that continuously returning rice straw to field had obvious influences on the soil characters of tobacco field,as well as the yield and quality of flue-cured tobacco. The soil bulk density,organic matter content,total nitrogen content and available potassium content changed very significantly after returning rice straw to field. Returning rice straw to field promoted the growth of tobacco plants,and improved the disease resistance of tobacco plants. The 2-year average tobacco leaf yield in treatment 3( returning rice straw to field plus applying decomposition agent) and treatment 2( directly returning rice straw to field) was respectively 9. 0% and 6. 4% higher than that in treatment 1( no returning rice straw to field),and the 2-year average production value of flue-cured tobacco was also 13. 6% and 10. 1% higher respectively. So returning rice straw to field had significant yield-increasing and income-increasing effects,and the effects in the second year were larger than those in the first year. After returning rice straw to field,the contents of inherent chemical compositions in tobacco leaves were in a suitable range,and the proportion of middle-high-class tobacco leaves was above 90%.
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Claims 10
Claim · model-written summary
Returning rice straw changed soil bulk density, organic matter, total nitrogen and available potassium.
- Taxon
- tobacco
Nicotiana tabacumt0 - Treatment
- returning rice straw to fielde0
- Outcome
- soil bulk density,organic matter content,total nitrogen content and available potassium contente0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The soil bulk density,organic matter content,total nitrogen content and available potassium content changed very significantly after returning rice straw to field”
t0“Continuous Cropping Tobacco Field”
Claim · model-written summary
Straw return promoted tobacco growth.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- Returning rice straw to fielde0
- Outcome
- growth of tobacco plantse0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Returning rice straw to field promoted the growth of tobacco plants”
Claim · model-written summary
Straw return improved tobacco disease resistance.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- Returning rice straw to fielde0
- Outcome
- disease resistance of tobacco plantse0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Returning rice straw to field promoted the growth of tobacco plants,and improved the disease resistance of tobacco plants”
Claim · model-written summary
Straw return plus decomposition agent increased average tobacco leaf yield by 9.0% relative to no return.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- returning rice straw to field plus applying decomposition agente0
- Outcome
- 2-year average tobacco leaf yielde0
- Direction
- highere0
- Value
- 9. 0%e0
- Comparator
- no returning rice straw to fielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 2-year average tobacco leaf yield in treatment 3( returning rice straw to field plus applying decomposition agent) and treatment 2( directly returning rice straw to field) was respectively 9. 0% and 6. 4% higher than that in treatment 1( no returning rice straw to field)”
Claim · model-written summary
Direct straw return increased average tobacco leaf yield by 6.4% relative to no return.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- directly returning rice straw to fielde0
- Outcome
- 2-year average tobacco leaf yielde0
- Direction
- highere0
- Value
- 6. 4%e0
- Comparator
- no returning rice straw to fielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 2-year average tobacco leaf yield in treatment 3( returning rice straw to field plus applying decomposition agent) and treatment 2( directly returning rice straw to field) was respectively 9. 0% and 6. 4% higher than that in treatment 1( no returning rice straw to field)”
Claim · model-written summary
Straw return plus decomposition agent increased tobacco production value by 13.6%.
- Taxon
- flue-cured tobaccoe0
- Treatment
- returning rice straw to field plus applying decomposition agentt0
- Outcome
- 2-year average production value of flue-cured tobaccoe0
- Direction
- highere0
- Value
- 13. 6%e0
Not reportedComparator
Verbatim
e0“the 2-year average production value of flue-cured tobacco was also 13. 6% and 10. 1% higher respectively”
t0“returning rice straw to field plus applying decomposition agent”
Claim · model-written summary
Direct straw return increased tobacco production value by 10.1%.
- Taxon
- flue-cured tobaccoe0
- Treatment
- directly returning rice straw to fielde1
- Outcome
- 2-year average production value of flue-cured tobaccoe0
- Direction
- highere0
- Value
- 10. 1%e0
Not reportedComparator
Verbatim
e0“the 2-year average production value of flue-cured tobacco was also 13. 6% and 10. 1% higher respectively”
t0“Flue-cured Tobacco”
e1“treatment 2( directly returning rice straw to field)”
Claim · model-written summary
Straw return effects on yield and income were larger in year two than year one.
Verbatim
e0“the effects in the second year were larger than those in the first year”
t0“Returning Rice Straw to Field plus Applying Decomposition Agent for Consecutive Two Years on Soil Characters of Continuous Cropping Tobacco Field,and Yield and Quality of Flue-cured Tobacco”
Claim · model-written summary
After straw return, inherent leaf chemical compositions were in a suitable range.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- returning rice straw to fielde0
- Outcome
- contents of inherent chemical compositions in tobacco leavese0
- Qualifier
- suitable rangee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After returning rice straw to field,the contents of inherent chemical compositions in tobacco leaves were in a suitable range”
t0“Continuous Cropping Tobacco Field”
Claim · model-written summary
After straw return, middle-high-class tobacco leaves exceeded 90%.
- Taxon
- tobaccoNicotiana tabacumt0
- Outcome
- proportion of middle-high-class tobacco leavese0
- Value
- above 90%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the proportion of middle-high-class tobacco leaves was above 90%”
t0“Continuous Cropping Tobacco Field”
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See all 6 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.