Abstract
The effects of altering, nutrient solution N:K ratio on growth of `TI-155' sweetpotato [Ipomoea batatas (L.) Lam] was evaluated in a greenhouse, as part of NASA's Closed Ecological Life Support Systems (CELSS) program for long duration space missions. Vine cuttings of `TI-155', were grown using nutrient film technique (NFT) in a modified half Hoagland's solution in channels (0.15×0.15×1.2 m). Plants were grown for 42 days in a culture solution in which N was doubled (6 mM) in order to accelerate foliage growth after which treatment N:K ratios of 1:2.4, (control) 1:4.8, and 1:7.2 were initiated. A randomized complete block design with 4 replications was used. The number of storage roots/plant increased linearly as K was increased in the solution. Storage root fresh and dry weights, growth rate (g m -2 d -1 ), fibrous root dry weight, foliage fresh and dry weights, and edible biomass index (root mass/total plant mass), though not significant all increased as K was increased in the nutrient solution. Nutrient solution analyses showed that K uptake was greatest in plants at the highest K level, while nitrate uptake was steady over the duration of crop growth regardless of treatments.
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Claims 6
Claim · model-written summary
Increasing K in the nutrient solution linearly increased the number of storage roots per sweetpotato plant.
- Taxon
- sweetpotato
_Flower.jpg?width=60)
Ipomoea batatase0 - Treatment
- K was increased in the solutione1
- Outcome
- number of storage roots/plante1
- Direction
- increasede1
- Qualifier
- linearlye1
- Setting
- greenhousee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Flower.jpg?width=500)
Verbatim
e0“growth of `TI-155' sweetpotato [Ipomoea batatas (L.) Lam] was evaluated in a greenhouse”
e1“The number of storage roots/plant increased linearly as K was increased in the solution”
Claim · model-written summary
Increasing K in the nutrient solution increased storage root fresh and dry weights and growth rate, though not significantly.
- Taxon
- sweetpotatoIpomoea batatase0
- Treatment
- K was increased in the nutrient solutione2
- Outcome
- Storage root fresh and dry weights, growth ratee2
- Direction
- increasede2
- Setting
- greenhousee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth of `TI-155' sweetpotato [Ipomoea batatas (L.) Lam] was evaluated in a greenhouse”
e2“Storage root fresh and dry weights, growth rate (g m -2 d -1 ), fibrous root dry weight, foliage fresh and dry weights, and edible biomass index (root mass/total plant mass), though not significant all increased as K was increased in the nutrient solution”
Claim · model-written summary
Increasing K in the nutrient solution increased fibrous root dry weight and foliage fresh and dry weights, though not significantly.
- Taxon
- sweetpotatoIpomoea batatase0
- Treatment
- K was increased in the nutrient solutione2
- Outcome
- fibrous root dry weight, foliage fresh and dry weightse2
- Direction
- increasede2
- Setting
- greenhousee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth of `TI-155' sweetpotato [Ipomoea batatas (L.) Lam] was evaluated in a greenhouse”
e2“Storage root fresh and dry weights, growth rate (g m -2 d -1 ), fibrous root dry weight, foliage fresh and dry weights, and edible biomass index (root mass/total plant mass), though not significant all increased as K was increased in the nutrient solution”
Claim · model-written summary
Increasing K in the nutrient solution increased the edible biomass index of sweetpotato, though not significantly.
- Taxon
- sweetpotatoIpomoea batatase0
- Treatment
- K was increased in the nutrient solutione2
- Outcome
- edible biomass indexe2
- Direction
- increasede2
- Setting
- greenhousee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth of `TI-155' sweetpotato [Ipomoea batatas (L.) Lam] was evaluated in a greenhouse”
e2“Storage root fresh and dry weights, growth rate (g m -2 d -1 ), fibrous root dry weight, foliage fresh and dry weights, and edible biomass index (root mass/total plant mass), though not significant all increased as K was increased in the nutrient solution”
Claim · model-written summary
K uptake was greatest in sweetpotato plants at the highest K level.
- Taxon
- sweetpotatoIpomoea batatase0
- Treatment
- highest K levele3
- Outcome
- K uptakee3
- Direction
- greateste3
- Setting
- greenhousee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth of `TI-155' sweetpotato [Ipomoea batatas (L.) Lam] was evaluated in a greenhouse”
e3“K uptake was greatest in plants at the highest K level, while nitrate uptake was steady over the duration of crop growth regardless of treatments”
Claim · model-written summary
Nitrate uptake by sweetpotato was steady over the crop growth regardless of treatments.
- Taxon
- sweetpotatoIpomoea batatase0
- Outcome
- nitrate uptakee3
- Direction
- steadye3
- Qualifier
- regardless of treatmentse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth of `TI-155' sweetpotato [Ipomoea batatas (L.) Lam] was evaluated in a greenhouse”
e3“K uptake was greatest in plants at the highest K level, while nitrate uptake was steady over the duration of crop growth regardless of treatments”
The same questions in other papers
fertilization · growth · Ipomoea batatas (sweet potato)Results differ
52 papers in the same direction as this paper · 10 in the opposite direction
- no effect
- no effect
- no effect
59 papers more in this group
See all 63 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.