Abstract
Abstract Observations by growers and county extension agents indicate that early-season field growth of flue-cured tobacco transplants produced in float greenhouses is sometimes slower than that of transplants produced in outside plantbeds (seedbeds). Experiments were conducted in 1995 and 1996 to evaluate possible differences in early field growth of shoots and roots of flue-cured tobacco transplants produced by each method. Treatments included seeding two weeks early, addition of N and/or P to the float water 10 days before transplanting, replacement of the fertilized water with tap water 10 days before transplanting, and severe clipping (0.5 cm above the buds) one day before transplanting. Normally-produced transplants of both transplant sources also received a high P, water-soluble fertilizer in the transplant water. The control treatment consisted of normal recommended practices for greenhouse and field transplants. High weather-related transplant mortality occurred with greenhouse transplants at one location in 1995 and with plantbed transplants that received the transplant water fertilizer at one location in 1996. Root mass of plantbed control plants was greater than that of greenhouse control plants at each sampling date (2, 4 and 6 weeks after transplanting) in 1995 and at the first sampling date in 1996. Shoot mass of plantbed control plants generally was greater than that of greenhouse control plants at the second and third sampling dates in three of four experiments. The seeding date and nutritional treatments imposed on seedlings in the greenhouse did not consistently or substantially influence early growth of roots or shoots in the field, but severe clipping one day before transplanting generally reduced shoot growth and delayed flowering of greenhouse transplants. Root and shoot weights, stem length, and flowering date of both transplants sources were sometimes improved by the transplant water fertilizer, but the effects generally were more consistent for transplants produced in the float greenhouse than for those produced in conventional plantbeds. Cured leaf yields of greenhouse transplants generally were lower than those of plantbed plants under the dry, windy conditions in 1995, and the effect was more pronounced for severely clipped transplants. Reducing sugar and total alkaloid concentrations in cured leaves were not significantly affected by plant source or any treatment imposed on greenhouse seedlings. Overall, early season growth of greenhouse seedlings was slower than that of plantbed seedlings and management treatments imposed in the greenhouse or field had little consistent effect on seedling growth of plantbed or greenhouse seedlings.
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Claims 14
Claim · model-written summary
Weather-related mortality occurred for greenhouse transplants at one 1995 location.
Verbatim
e0“High weather-related transplant mortality occurred with greenhouse transplants at one location in 1995”
t0“flue-cured tobacco”
e1“High weather-related transplant mortality occurred”
Claim · model-written summary
Weather-related mortality occurred for fertilized plantbed transplants at one 1996 location.
Verbatim
e0“with plantbed transplants that received the transplant water fertilizer at one location in 1996.”
t0“flue-cured tobacco”
e1“High weather-related transplant mortality occurred”
Claim · model-written summary
Plantbed controls had greater root mass than greenhouse controls at each 1995 sampling and the first 1996 sampling.
Verbatim
e0“Root mass of plantbed control plants was greater than that of greenhouse control plants at each sampling date (2, 4 and 6 weeks after transplanting) in 1995 and at the first sampling date in 1996.”
t0“flue-cured tobacco”
e1“High weather-related transplant mortality occurred”
Claim · model-written summary
Plantbed controls generally had greater shoot mass than greenhouse controls at later dates in three experiments.
Verbatim
e0“Shoot mass of plantbed control plants generally was greater than that of greenhouse control plants at the second and third sampling dates in three of four experiments.”
t0“flue-cured tobacco”
e1“High weather-related transplant mortality occurred”
Claim · model-written summary
Seeding date and nutritional treatments did not consistently influence early root or shoot growth.
- Taxon
- flue-cured tobaccot0
- Treatment
- seeding date and nutritional treatmentse0
- Outcome
- early growth of roots or shootse0
- Direction
- did not consistently or substantially influencee0
Not reportedComparator
Verbatim
e0“The seeding date and nutritional treatments imposed on seedlings in the greenhouse did not consistently or substantially influence early growth of roots or shoots in the field”
t0“flue-cured tobacco”
e1“High weather-related transplant mortality occurred”
Claim · model-written summary
Severe clipping generally reduced shoot growth of greenhouse transplants.
- Taxon
- flue-cured tobaccot0
- Treatment
- severe clipping one day before transplantinge0
- Outcome
- shoot growthe0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“severe clipping one day before transplanting generally reduced shoot growth and delayed flowering of greenhouse transplants.”
t0“flue-cured tobacco”
e1“High weather-related transplant mortality occurred”
Claim · model-written summary
Severe clipping generally delayed flowering of greenhouse transplants.
- Taxon
- flue-cured tobaccot0
- Treatment
- severe clipping one day before transplantinge0
- Outcome
- floweringe0
- Direction
- delayede0
Not reportedComparator
Verbatim
e0“severe clipping one day before transplanting generally reduced shoot growth and delayed flowering of greenhouse transplants.”
t0“flue-cured tobacco”
e1“High weather-related transplant mortality occurred”
Claim · model-written summary
Transplant water fertilizer sometimes improved root and shoot weights and stem length.
- Taxon
- flue-cured tobaccot0
- Treatment
- transplant water fertilizere0
- Outcome
- Root and shoot weights, stem lengthe0
- Direction
- improvede0
Not reportedComparator
Verbatim
e0“Root and shoot weights, stem length, and flowering date of both transplants sources were sometimes improved by the transplant water fertilizer”
t0“flue-cured tobacco”
e1“High weather-related transplant mortality occurred”
Claim · model-written summary
Transplant water fertilizer sometimes improved flowering date.
- Taxon
- flue-cured tobaccot0
- Treatment
- transplant water fertilizere0
- Outcome
- flowering datee0
- Direction
- improvede0
Not reportedComparator
Verbatim
e0“Root and shoot weights, stem length, and flowering date of both transplants sources were sometimes improved by the transplant water fertilizer”
t0“flue-cured tobacco”
e1“High weather-related transplant mortality occurred”
Claim · model-written summary
Fertilizer effects were more consistent for float greenhouse transplants than plantbed transplants.
Verbatim
e0“the effects generally were more consistent for transplants produced in the float greenhouse than for those produced in conventional plantbeds.”
t0“flue-cured tobacco”
e1“High weather-related transplant mortality occurred”
Claim · model-written summary
Cured leaf yields of greenhouse transplants were generally lower than plantbed plants in dry, windy 1995 conditions.
Verbatim
e0“Cured leaf yields of greenhouse transplants generally were lower than those of plantbed plants under the dry, windy conditions in 1995”
t0“flue-cured tobacco”
e1“High weather-related transplant mortality occurred”
Claim · model-written summary
The lower yield effect was more pronounced for severely clipped transplants.
Verbatim
e0“the effect was more pronounced for severely clipped transplants.”
t0“flue-cured tobacco”
e1“High weather-related transplant mortality occurred”
Claim · model-written summary
Plant source and seedling treatments did not significantly affect reducing sugar concentration in cured leaves.
- Taxon
- flue-cured tobaccot0
- Treatment
- plant source or any treatment imposed on greenhouse seedlingse0
- Outcome
- Reducing sugare0
- Direction
- not significantly affectede0
Not reportedComparator
Verbatim
e0“Reducing sugar and total alkaloid concentrations in cured leaves were not significantly affected by plant source or any treatment imposed on greenhouse seedlings.”
t0“flue-cured tobacco”
e1“High weather-related transplant mortality occurred”
Claim · model-written summary
Plant source and seedling treatments did not significantly affect total alkaloid concentration in cured leaves.
- Taxon
- flue-cured tobaccot0
- Treatment
- plant source or any treatment imposed on greenhouse seedlingse0
- Outcome
- total alkaloid concentrationse0
- Direction
- not significantly affectede0
Not reportedComparator
Verbatim
e0“Reducing sugar and total alkaloid concentrations in cured leaves were not significantly affected by plant source or any treatment imposed on greenhouse seedlings.”
t0“flue-cured tobacco”
e1“High weather-related transplant mortality occurred”
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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.