Abstract
To evaluate the yield and quality of barley (Hordeum vulgare)–vetch (Vicia desycarpa) intercropping, a series of experiments were conducted at the Experimental Field of the College of Agriculture, University of Tehran, in Karaj (Iran) from 2003 to 2005. The experiments were arranged in a randomized complete block with a split plot design and four replications. Three levels (0, 45 and 90 Kg N ha -1 ) of nitrogen fertilizer and three cropping systems (sole barley, sole vetch and barley-vetch intercropping) were allocated to the main and sub plots, respectively. The barley-vetch intercropping treatment had a replacement arrangement (50: 50) with single alternate rows. Land equivalent ratio (LER), was used to compare sole cropping with intercropping systems. Results showed the supremacy of intercropping of barley and vetch over single crops. Generally, increasing nitrogen fertilizer caused a decreasing trend in the biological efficiency of intercropping. The highest LER for grain was obtained in control (N fertilizer free) plots (LER= 1.145). Nitrogen fertilizer increased the forage yield, grain yield, crude protein content, and crude protein yield of barley and vetch in sole and intercrops. Nitrogen application increased water use efficiency. In this study, barley was the dominant crop. The intercropping vetch and barley had the highest productivity and crude protein yield.
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Claims 8
Claim · model-written summary
Intercropping of barley and vetch was superior to single crops.
Verbatim
e1“Results showed the supremacy of intercropping of barley and vetch over single crops”
t0“Evaluation of Barley-Vetch Intercrop at Different Nitrogen Rates”
Claim · model-written summary
The highest LER for grain was in control (N fertilizer free) plots, at 1.145.
- Taxon
- Barley
.jpg?width=60)
Hordeum vulgaret0 - Outcome
- LER for graine1
- Value
- 1.145e1
- Qualifier
- control (N fertilizer free) plotse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e1“The highest LER for grain was obtained in control (N fertilizer free) plots (LER= 1.145)”
t0“Evaluation of Barley-Vetch Intercrop at Different Nitrogen Rates”
Claim · model-written summary
Increasing nitrogen fertilizer decreased the biological efficiency of barley-vetch intercropping.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- increasing nitrogen fertilizere1
- Outcome
- biological efficiency of intercroppinge1
- Direction
- decreasing trende1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Generally, increasing nitrogen fertilizer caused a decreasing trend in the biological efficiency of intercropping”
t0“Evaluation of Barley-Vetch Intercrop at Different Nitrogen Rates”
Claim · model-written summary
Nitrogen fertilizer increased forage yield, grain yield and crude protein content of barley and vetch.
- Taxon
- barley and vetche1
- Treatment
- Nitrogen fertilizere1
- Outcome
- forage yield, grain yield, crude protein contente1
- Direction
- increasede1
Not reportedComparator
Verbatim
e1“Nitrogen fertilizer increased the forage yield, grain yield, crude protein content, and crude protein yield of barley and vetch in sole and intercrops”
t0“Evaluation of Barley-Vetch Intercrop at Different Nitrogen Rates”
Claim · model-written summary
Nitrogen fertilizer increased crude protein yield of barley and vetch.
- Taxon
- barley and vetche1
- Treatment
- Nitrogen fertilizere1
- Outcome
- crude protein yielde1
- Direction
- increasede1
Not reportedComparator
Verbatim
e1“Nitrogen fertilizer increased the forage yield, grain yield, crude protein content, and crude protein yield of barley and vetch in sole and intercrops”
t0“Evaluation of Barley-Vetch Intercrop at Different Nitrogen Rates”
Claim · model-written summary
Nitrogen application increased water use efficiency.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- Nitrogen applicatione1
- Outcome
- water use efficiencye1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Nitrogen application increased water use efficiency”
t0“Evaluation of Barley-Vetch Intercrop at Different Nitrogen Rates”
Claim · model-written summary
Barley was the dominant crop in the barley-vetch intercrop.
- Taxon
- barleyHordeum vulgaree1
- Outcome
- dominant crope1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In this study, barley was the dominant crop”
t0“Evaluation of Barley-Vetch Intercrop at Different Nitrogen Rates”
Claim · model-written summary
Barley-vetch intercropping had the highest productivity and crude protein yield.
- Taxon
- vetch and barleye1
- Treatment
- intercroppinge1
- Outcome
- productivity and crude protein yielde1
- Direction
- higheste1
Not reportedComparator
Verbatim
e1“The intercropping vetch and barley had the highest productivity and crude protein yield”
t0“Evaluation of Barley-Vetch Intercrop at Different Nitrogen Rates”
The same questions in other papers
nitrogen · physiology: water · Hordeum vulgare (barley)Positive and negative results
4 papers in the same direction as this paper · 1 reporting no difference from an alternative
- no effect
- positive
- positive
2 papers more in this group
See all 6 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.