Abstract
In order to promote the production of high quality flue-cured tobacco,taking flue-cured tobacco variety LongJiang 911 as material under field experiment,the effect of reducing chemical-fertilizer on leaf photosynthetic characteristics,the chlorophyll fluorescence characteristics,the yield and quality of flue-cured tobacco were studied.The results showed that the SPAD was decline when reducing amount of chemical-fertilizer,but the photosynthetic rate,the rate of transpiration,stomatal conductance and actual photochemical efficiency of PSⅡin the light increased,treatments that nitrogenous fertilizer amount overall of 39.75 and 32.25kg·hm-2improved water use efficiency,and nitrogenous fertilizer amount below 32.25kg·hm-2 reduced the flue-cured tobacco water use efficiency;nitrogenous fertilizer amount of 39.75 kg hm-2had the highest of the proportion of tobacco leaves with middle and first rank,orange level rate,average price,yield and output value of the fluecured tobacco on middle leaf,nitrogenous fertilizer overall amount of 2.25kg·hm-2 reduced orange level rate,yield and output value.The results indicated that 39.75kg·hm-2 amount of nitrogenous fertilizer about reducing amount of chemical-fertilizer was the most appropriate value,which was advantage to enhance the photosynthetic characteristics,the chlorophyll fluorescence characteristics,the yield and quality of flue-cured tobacco on leaf,little amount of nitrogenous fertilizer would be reduce yield and quality of flue cured tobacco leaves.
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Claims 7
Claim · model-written summary
Reducing fertilizer lowered leaf SPAD.
- Taxon
- flue-cured tobaccot0
- Treatment
- reducing amount of chemical-fertilizere0
- Outcome
- SPADe0
- Direction
- declinee0
Not reportedComparator
Verbatim
e0“the SPAD was decline when reducing amount of chemical-fertilizer”
t0“Flue-cured Tobacco”
Claim · model-written summary
Reduced fertilizer increased photosynthetic rate, transpiration, stomatal conductance and PSII efficiency.
- Taxon
- flue-cured tobaccot0
- Outcome
- photosynthetic rate,the rate of transpiration,stomatal conductance and actual photochemical efficiency of PSⅡin the lighte0
- Direction
- increasede0
Not reportedTreatmentComparator
Verbatim
e0“the photosynthetic rate,the rate of transpiration,stomatal conductance and actual photochemical efficiency of PSⅡin the light increased”
t0“Flue-cured Tobacco”
Claim · model-written summary
Nitrogen rates of 39.75 and 32.25 kg per hectare improved water use efficiency.
- Taxon
- flue-cured tobaccot0
- Treatment
- nitrogenous fertilizer amount overall of 39.75 and 32.25kg·hm-2e0
- Outcome
- water use efficiencye0
- Direction
- improvede0
Not reportedComparator
Verbatim
e0“treatments that nitrogenous fertilizer amount overall of 39.75 and 32.25kg·hm-2improved water use efficiency”
t0“Flue-cured Tobacco”
Claim · model-written summary
Nitrogen below 32.25 kg per hectare reduced tobacco water use efficiency.
- Taxon
- flue-cured tobaccoe0
- Treatment
- nitrogenous fertilizer amount below 32.25kg·hm-2e0
- Outcome
- water use efficiencye0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“nitrogenous fertilizer amount below 32.25kg·hm-2 reduced the flue-cured tobacco water use efficiency”
Claim · model-written summary
At 39.75 kg per hectare, leaf rank, orange leaf rate, price, yield and output value were highest.
- Taxon
- flue-cured tobaccot0
- Treatment
- nitrogenous fertilizer amount of 39.75 kg hm-2e0
- Outcome
- proportion of tobacco leaves with middle and first rank,orange level rate,average price,yield and output valuee0
- Direction
- higheste0
Not reportedComparator
Verbatim
e0“nitrogenous fertilizer amount of 39.75 kg hm-2had the highest of the proportion of tobacco leaves with middle and first rank,orange level rate,average price,yield and output value of the fluecured tobacco on middle leaf”
t0“Flue-cured Tobacco”
Claim · model-written summary
The 2.25 kg per hectare rate reduced orange leaf rate, yield and output value.
- Taxon
- flue-cured tobaccot0
- Treatment
- nitrogenous fertilizer overall amount of 2.25kg·hm-2e0
- Outcome
- orange level rate,yield and output valuee0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“nitrogenous fertilizer overall amount of 2.25kg·hm-2 reduced orange level rate,yield and output value”
t0“Flue-cured Tobacco”
Claim · model-written summary
The authors identified 39.75 kg per hectare as the most appropriate nitrogen rate.
Verbatim
e0“39.75kg·hm-2 amount of nitrogenous fertilizer about reducing amount of chemical-fertilizer was the most appropriate value”
t0“Flue-cured Tobacco”
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