Abstract
A field study was conducted from 1998 to 2000 in Ciudad Real (Spain) to analyze the productive response of thebarley (Hordeum vulgare L.) crop to different nitrogen-fertilizer strategies. The effect of N dose and its partitioningbetween sowing-time and top-dressing at tillering state on grain yield and yield components was evaluated, as well asthe contribution of each one of these parameters to the final yield by means of a correlation and regression study, andpath coefficient analysis. The specific climatic conditions of each growing season had a very marked effect on barleycrops, and grain yields and yield components significantly differed every year. No significant differences in yieldwere found between 100 and 150 kg N ha-1 doses, but yield was significantly reduced by applying 200 kg N ha-1. Theevolution of grain yield according to N fertilizer was properly fitted to a quadratic function, with the maximum valuecorresponding to about 120 kg N ha-1. It is not advisable to exceed this dose because this is of no benefit to the plantand implies a risk of environmental contamination. The highest yield was obtained by applying two thirds of the totalN fertilizer at seeding time, whereas a single application of N fertilizer as a top-dressing resulted in a significantreduction in barley grain yield. In these field conditions, grain yield mainly depended on the number of ears per squaremeter, being the 1000-kernel weight the most stable yield component.
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Claims 9
Claim · model-written summary
Barley yield did not differ significantly between 100 and 150 kg N/ha.
- Taxon
- barley (Hordeum vulgare L.)
.jpg?width=60)
Hordeum vulgaret0 - Treatment
- 100 and 150 kg N ha-1 dosese1
- Outcome
- yielde1
- Direction
- No significant differencese1
- Setting
- Ciudad Real (Spain)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e1“No significant differences in yield were found between 100 and 150 kg N ha-1 doses, but yield was significantly reduced by applying 200 kg N ha-1”
e2“A field study was conducted from 1998 to 2000 in Ciudad Real (Spain)”
t0“grain yield of barley (Hordeum vulgare L.) under irrigated conditions”
Claim · model-written summary
Applying 200 kg N/ha significantly reduced barley yield relative to the 100 and 150 kg N/ha doses.
- Taxon
- barley (Hordeum vulgare L.)Hordeum vulgaret0
- Treatment
- 200 kg N ha-1e1
- Outcome
- yielde1
- Direction
- reducede1
- Comparator
- 100 and 150 kg N ha-1 dosese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“No significant differences in yield were found between 100 and 150 kg N ha-1 doses, but yield was significantly reduced by applying 200 kg N ha-1”
t0“grain yield of barley (Hordeum vulgare L.) under irrigated conditions”
Claim · model-written summary
Barley yield followed a quadratic response to N fertilizer with a maximum at about 120 kg N/ha.
- Taxon
- barley (Hordeum vulgare L.)Hordeum vulgaret0
- Treatment
- N fertilizere1
- Outcome
- grain yielde1
- Value
- 120 kg N ha-1e1
- Qualifier
- quadratic functione1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“of grain yield according to N fertilizer was properly fitted to a quadratic function, with the maximum value corresponding to about 120 kg N ha-1”
t0“grain yield of barley (Hordeum vulgare L.) under irrigated conditions”
Claim · model-written summary
Exceeding this N dose is not advisable because it gives no benefit to the plant and risks environmental contamination.
- Taxon
- barley (Hordeum vulgare L.)Hordeum vulgaret0
- Outcome
- exceed this dosee1
- Qualifier
- of no benefit to the plante1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“It is not advisable to exceed this dose because this is of no benefit to the plant and implies a risk of environmental contamination”
t0“grain yield of barley (Hordeum vulgare L.) under irrigated conditions”
Claim · model-written summary
Applying two thirds of the total N at seeding time gave the highest barley yield compared with a single top-dressing application.
- Taxon
- barley (Hordeum vulgare L.)Hordeum vulgaret0
- Treatment
- two thirds of the total N fertilizer at seeding timee1
- Outcome
- yielde1
- Direction
- higheste1
- Comparator
- a single application of N fertilizer as a top-dressinge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The highest yield was obtained by applying two thirds of the total N fertilizer at seeding time, whereas a single application of N fertilizer as a top-dressing resulted in a significantreduction in barley grain yield”
t0“grain yield of barley (Hordeum vulgare L.) under irrigated conditions”
Claim · model-written summary
A single N application as top-dressing significantly reduced barley grain yield compared with two thirds applied at seeding.
- Taxon
- barley (Hordeum vulgare L.)Hordeum vulgaret0
- Treatment
- a single application of N fertilizer as a top-dressinge1
- Outcome
- barley grain yielde1
- Direction
- reductione1
- Comparator
- two thirds of the total N fertilizer at seeding timee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The highest yield was obtained by applying two thirds of the total N fertilizer at seeding time, whereas a single application of N fertilizer as a top-dressing resulted in a significantreduction in barley grain yield”
t0“grain yield of barley (Hordeum vulgare L.) under irrigated conditions”
Claim · model-written summary
In these field conditions, grain yield depended mainly on the number of ears per square metre.
- Taxon
- barley (Hordeum vulgare L.)Hordeum vulgaret0
- Outcome
- grain yielde1
- Qualifier
- number of ears per squaremetere1
- Setting
- these field conditionse1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In these field conditions, grain yield mainly depended on the number of ears per squaremeter, being the 1000-kernel weight the most stable yield component”
t0“grain yield of barley (Hordeum vulgare L.) under irrigated conditions”
Claim · model-written summary
The 1000-kernel weight was the most stable yield component of barley.
- Taxon
- barley (Hordeum vulgare L.)Hordeum vulgaret0
- Outcome
- 1000-kernel weighte1
- Qualifier
- the most stable yield componente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In these field conditions, grain yield mainly depended on the number of ears per squaremeter, being the 1000-kernel weight the most stable yield component”
t0“grain yield of barley (Hordeum vulgare L.) under irrigated conditions”
Claim · model-written summary
The climatic conditions of each growing season had a very marked effect on barley, and grain yields and yield components differed significantly between years.
- Taxon
- barley (Hordeum vulgare L.)Hordeum vulgaret0
- Treatment
- specific climatic conditions of each growing seasone1
- Outcome
- grain yields and yield componentse1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The specific climatic conditions of each growing season had a very marked effect on barley crops, and grain yields and yield components significantly differed every year”
t0“grain yield of barley (Hordeum vulgare L.) under irrigated conditions”
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