Abstract
SummaryOverhead irrigation is a common irrigation practice in nurseries, yet it can be wasteful of water and nutrients. We compared the water use, fertilizer use and growth of ‘Top Gun’ lettuce (Lactuca sativa L.) and ‘Grosse Lisse’ tomato (Lycopersicon esculentum Mill.) seedlings in sub and overhead irrigation systems. Five rates of controlled release fertilizer were used – 0.625, 1.25, 2.5, 5 and 10 kg m–3. Sub-irrigation used 86% less water than overhead irrigation. Irrigation type had a significant effect on some growth measurements by final harvest, 43 d after sowing. The sub-irrigated lettuce seedlings were significantly taller. The overhead irrigated lettuce seedlings had a higher dry weight and more leaves. The sub-irrigated tomato seedlings were taller, had longer leaves, a larger leaf area and more leaves. Increasing levels of controlled release fertilizer produced quadratic type responses over time for shoot dry weight, with 10 kg m–3 producing tomato and lettuce transplants with a higher biomass in a shorter time than lower levels of fertilizer.
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Claims 7
Claim · model-written summary
Sub-irrigation used 86% less water than overhead irrigation.
- Taxon
- lettuce
Lactuca sativat0 - Treatment
- Sub-irrigatione0
- Outcome
- watere0
- Direction
- lesse0
- Value
- 86%e0
- Comparator
- overhead irrigatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sub-irrigation used 86% less water than overhead irrigation.”
t0“lettuce”
Claim · model-written summary
Sub-irrigated lettuce seedlings were significantly taller.
- Taxon
- lettuceLactuca sativae0
- Treatment
- sub-irrigatede0
- Outcome
- lettuce seedlingse0
- Direction
- tallere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sub-irrigated lettuce seedlings were significantly taller.”
Claim · model-written summary
Overhead irrigated lettuce seedlings had higher dry weight and more leaves.
- Taxon
- lettuceLactuca sativae0
- Treatment
- overhead irrigatede0
- Outcome
- dry weight and more leavese0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The overhead irrigated lettuce seedlings had a higher dry weight and more leaves.”
Claim · model-written summary
Sub-irrigated tomato seedlings were taller and had longer leaves, larger leaf area, and more leaves.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- sub-irrigatede0
- Outcome
- taller, had longer leaves, a larger leaf area and more leavese0
- Direction
- largere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sub-irrigated tomato seedlings were taller, had longer leaves, a larger leaf area and more leaves.”
Claim · model-written summary
Increasing controlled release fertilizer produced quadratic shoot dry weight responses over time.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- controlled release fertilizere0
- Outcome
- shoot dry weighte0
- Qualifier
- quadratic type responsese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing levels of controlled release fertilizer produced quadratic type responses over time for shoot dry weight”
t0“tomato”
Claim · model-written summary
A fertilizer rate of 10 kg m–3 produced tomato transplants with higher biomass in a shorter time than lower rates.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- 10 kg m–3e0
- Outcome
- biomasse0
- Direction
- highere0
- Comparator
- lower levels of fertilizere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“10 kg m–3 producing tomato and lettuce transplants with a higher biomass in a shorter time than lower levels of fertilizer.”
Claim · model-written summary
A fertilizer rate of 10 kg m–3 produced lettuce transplants with higher biomass in a shorter time than lower rates.
- Taxon
- lettuceLactuca sativae0
- Treatment
- 10 kg m–3e0
- Outcome
- biomasse0
- Direction
- highere0
- Comparator
- lower levels of fertilizere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“10 kg m–3 producing tomato and lettuce transplants with a higher biomass in a shorter time than lower levels of fertilizer.”
The same questions in other papers
irrigation · growth · Lactuca sativa (garden lettuce)Positive and negative results
31 papers in the same direction as this paper · 11 in the opposite direction · 2 reporting no difference from an alternative
- no effect
- no effect
- negative
41 papers more in this group
See all 45 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.