Abstract
Two experiments were conducted at the roof of Central Laboratory for Agricultural Climate, Dokki, Giza-Egypt. Two lettuce types (Lactuca sativa L.) iceberg and romaine were transplanted at October during the two seasons (2006 and 2007) into white polyethylene container filled with coconut fiber media. The experiments aimed to study the effect of three nitrogen levels (50, 100 and 150 ppm) applied by fertigation and three compost levels (0, 2 and 4% by volume). The experimental design was a completely randomized factorial design with three replications. Using different nitrogen and compost levels were affected vegetative growth, nutrients content (N, P, K, Ca, Mg and NO3) and yield. The obtained results indicated that the increasing nitrogen level up to 150 ppm significantly increased plant height, number of leaves per plant, dry weight and yield. Compost 4% level gave the highest vegetative growth and yield comparing with the other compost treatments. The highest nitrogen level (150ppm) combined with compost 4% increased vegetative growth and yield significantly. On the other hand, 50 ppm nitrogen gave the highest nitrogen use efficiency (NUE) and the least value of nitrate content in leaves followed by 100 ppm. The highest nitrogen level (150ppm) led to increase nitrate content over the healthy save line with different compost levels.
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Claims 7
Claim · model-written summary
Nitrogen up to 150 ppm significantly increased lettuce height, leaf number, and dry weight.
- Taxon
- LETTUCE
Lactuca sativat0 - Treatment
- nitrogen level up to 150 ppme0
- Outcome
- plant height, number of leaves per plant, dry weighte0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing nitrogen level up to 150 ppm significantly increased plant height, number of leaves per plant, dry weight”
t0“LETTUCE PLANT”
Claim · model-written summary
Nitrogen up to 150 ppm significantly increased lettuce yield.
- Taxon
- LETTUCELactuca sativat0
- Treatment
- nitrogen level up to 150 ppme0
- Outcome
- yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing nitrogen level up to 150 ppm significantly increased plant height, number of leaves per plant, dry weight and yield”
t0“LETTUCE PLANT”
Claim · model-written summary
Compost at 4% gave the highest lettuce vegetative growth and yield compared with other compost treatments.
- Taxon
- LETTUCELactuca sativat0
- Treatment
- Compost 4% levele0
- Outcome
- vegetative growth and yielde0
- Direction
- higheste0
- Comparator
- other compost treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compost 4% level gave the highest vegetative growth and yield comparing with the other compost treatments”
t0“LETTUCE PLANT”
Claim · model-written summary
The combination of 150 ppm nitrogen and 4% compost significantly increased lettuce vegetative growth and yield.
- Taxon
- LETTUCELactuca sativat0
- Treatment
- highest nitrogen level (150ppm) combined with compost 4%e0
- Outcome
- vegetative growth and yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest nitrogen level (150ppm) combined with compost 4% increased vegetative growth and yield significantly”
t0“LETTUCE PLANT”
Claim · model-written summary
The 50 ppm nitrogen treatment gave the highest lettuce nitrogen use efficiency.
- Taxon
- LETTUCELactuca sativat0
- Treatment
- 50 ppm nitrogene0
- Outcome
- nitrogen use efficiency (NUE)e0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“50 ppm nitrogen gave the highest nitrogen use efficiency (NUE)”
t0“LETTUCE PLANT”
Claim · model-written summary
The 50 ppm nitrogen treatment gave the lowest lettuce leaf nitrate content, followed by 100 ppm.
- Taxon
- LETTUCELactuca sativat0
- Organ / stage
- leavese0
- Treatment
- 50 ppm nitrogene0
- Outcome
- nitrate content in leavese0
- Direction
- leaste0
- Comparator
- 100 ppme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“50 ppm nitrogen gave the highest nitrogen use efficiency (NUE) and the least value of nitrate content in leaves followed by 100 ppm”
t0“LETTUCE PLANT”
Claim · model-written summary
At 150 ppm nitrogen, lettuce leaf nitrate content exceeded the healthy safe line across compost levels.
- Taxon
- LETTUCELactuca sativat0
- Treatment
- highest nitrogen level (150ppm)e0
- Outcome
- nitrate contente0
- Direction
- increasee0
- Qualifier
- with different compost levelse0
- Comparator
- healthy save linee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest nitrogen level (150ppm) led to increase nitrate content over the healthy save line with different compost levels”
t0“LETTUCE PLANT”
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