Abstract
Growth of hand-watered and subirrigated `Ultra Red' petunia ( Petunia × hybrida Hort.) and `Super Elfin Violet' impatiens ( Impatiens wallerana Hook.f.) plants were compared when grown using four controlled-release fertilizer rates and four fertilizer placements in the pot. Furthermore, the amount of NO 3 -N leached from hand-watered plants was compared to amount captured by subirrigation system. Before planting, Osmocote (14N-6.2P-11.6K) (4 month release) was either topdressed (TD), layered in the middle of the pot (M), layered at the bottom of the pot (B), or incorporated throughout (I) the substrate at 1.25, 2.5, 5.0, or 7.5 kg·m -3 (oz/ft 3 ). Shoot dry mass of petunia plants was similar between both irrigation systems and among the four fertilizer placements. Subirrigated petunias fertilized with 2.5 kg·m -3 had similar shoot dry mass as hand-watered petunias fertilized with 7.5 kg·m -3 . Hand-watered impatiens had greater shoot dry mass than subirrigated impatiens. Hand-watered impatiens also had greater shoot dry mass in pots with fertilizer at TD, M, or I than with fertilizer at B, but no difference in growth was observed in subirrigated impatiens among the different fertilizer placements. Finally, significantly more NO 3 -N was leached from hand-watered plants than was captured with the subirrigation systems.
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Claims 6
Claim · model-written summary
Petunia shoot dry mass was similar across irrigation systems and fertilizer placements.
- Treatment
- both irrigation systemse0
- Outcome
- Shoot dry masse0
- Direction
- similare0
- Comparator
- four fertilizer placementse0
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PetuniaOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
_flowers_in_Westgate_Gardens%2C_Canterbury.jpg?width=500)
Verbatim
e0“Shoot dry mass of petunia plants was similar between both irrigation systems and among the four fertilizer placements”
Claim · model-written summary
Petunias under lower subirrigated fertilizer rate had similar mass to hand-watered plants at higher rate.
- Treatment
- Subirrigated petunias fertilized with 2.5 kg·m -3e0
- Outcome
- shoot dry masse0
- Direction
- similare0
- Comparator
- hand-watered petunias fertilized with 7.5 kg·m -3e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Subirrigated petunias fertilized with 2.5 kg·m -3 had similar shoot dry mass as hand-watered petunias fertilized with 7.5 kg·m -3”
Claim · model-written summary
Hand-watered impatiens had greater shoot dry mass than subirrigated plants.
ImpatiensOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hand-watered impatiens had greater shoot dry mass than subirrigated impatiens”
Claim · model-written summary
Hand-watered impatiens with top, middle or incorporated fertilizer had greater shoot mass than bottom placement.
- Treatment
- fertilizer at TD, M, or Ie0
- Outcome
- shoot dry masse0
- Direction
- greatere0
- Comparator
- fertilizer at Be0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hand-watered impatiens also had greater shoot dry mass in pots with fertilizer at TD, M, or I than with fertilizer at B”
Claim · model-written summary
Subirrigated impatiens growth did not differ among fertilizer placements.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no difference in growth was observed in subirrigated impatiens among the different fertilizer placements”
Claim · model-written summary
Hand watering leached more nitrate nitrogen than subirrigation captured.
Verbatim
e0“significantly more NO 3 -N was leached from hand-watered plants than was captured with the subirrigation systems”
t0“Bedding Plant”
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