Abstract
Abstract Nutrient leaching during nursery container production can have negative effects on plant growth and the environment. The objective of this study was to evaluate effects of fertilizer source at two irrigation depths on nutrient leaching during coleus [ Plectranthus scutellarioides (L.) Codd] ‘Solar Sunrise' container production to develop best management practices. Coleus received no fertilizer, a controlled-release fertilizer (CRF), or a water-soluble fertilizer (WSF) applied at 0.30 kg N and P per m 3 (0.02 lb per ft 3 ) and were irrigated at 1.9 or 3.8 cm . day −1 (0.7 or 1.5 in . day −1 ) for 56 days after planting (DAP). Leachate was analyzed every 7 DAP for inorganic N and dissolved total P (DTP). At 56 DAP, root biomass, leaf quality, and plant growth index were similar between CRF and WSF treatments at both irrigation depths. Highest inorganic N and DTP losses occurred within 21 DAP. Application of WSF resulted in higher cumulative N and DTP losses compared to CRF applications. Coleus irrigated at 3.8 cm . day −1 and fertilized with WSF resulted in higher DTP losses compared to CRF applications regardless of irrigation depth. Reducing irrigation reduced inorganic N leaching for each fertilizer source. Application of CRF provided consistent growth while curbing nutrient losses across both irrigation depths compared to WSF. Index words: controlled-release fertilizer, water-soluble fertilizer, nursery producers, best management practices. Chemicals used in this study : Micronutrients mix (Micromax®); controlled-release fertilizer (Osmocote® Classic); water-soluble fertilizer (Grower's Special). Species used in this study : Coleus [ Plectranthus scutellarioides (L.) Codd] ‘Solar Sunrise'.
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Claims 6
Claim · model-written summary
Coleus root biomass, leaf quality and growth index were similar with controlled-release and water-soluble fertilizer at both irrigation depths after 56 days.
- Treatment
- CRFe0
- Outcome
- root biomass, leaf quality, and plant growth indexe0
- Direction
- similare0
- Qualifier
- at both irrigation depthse0
- Comparator
- WSF treatmentse0
Not reportedTaxon
Verbatim
e0“At 56 DAP, root biomass, leaf quality, and plant growth index were similar between CRF and WSF treatments at both irrigation depths.”
Claim · model-written summary
The highest inorganic N and dissolved total P losses occurred within 21 days after planting.
ColeusNot reportedValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Highest inorganic N and DTP losses occurred within 21 DAP.”
t0“Coleus Container Production”
Claim · model-written summary
Water-soluble fertilizer caused greater cumulative nitrogen and dissolved total phosphorus losses than controlled-release fertilizer.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of WSF resulted in higher cumulative N and DTP losses compared to CRF applications.”
t0“Coleus Container Production”
Claim · model-written summary
At the higher irrigation depth, water-soluble fertilizer produced greater dissolved total phosphorus losses than controlled-release fertilizer at either irrigation depth.
- Treatment
- irrigated at 3.8 cm . day −1 and fertilized with WSFe0
- Outcome
- DTP lossese0
- Direction
- highere0
- Comparator
- CRF applications regardless of irrigation depthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Coleus irrigated at 3.8 cm . day −1 and fertilized with WSF resulted in higher DTP losses compared to CRF applications regardless of irrigation depth.”
Claim · model-written summary
Reducing irrigation lowered inorganic nitrogen leaching for each fertilizer source.
- Treatment
- Reducing irrigatione0
- Outcome
- inorganic N leachinge0
- Direction
- reducede0
- Qualifier
- for each fertilizer sourcee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reducing irrigation reduced inorganic N leaching for each fertilizer source.”
t0“Coleus Container Production”
Claim · model-written summary
Controlled-release fertilizer provided consistent coleus growth and reduced nutrient losses across both irrigation depths relative to water-soluble fertilizer.
- Treatment
- CRFe0
- Outcome
- consistent growth while curbing nutrient lossese0
- Direction
- curbinge0
- Qualifier
- across both irrigation depthse0
- Comparator
- WSFe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of CRF provided consistent growth while curbing nutrient losses across both irrigation depths compared to WSF.”
t0“Coleus Container Production”
The same questions in other papers
fertilization · growth · ColeusPositive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
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.