Abstract
Salinity is one of the main constrains for wheat production in south of Khorasan province, Iran. In this region, wild oat (Avena ludoviciana) is one of the noxious weeds which compete with wheat crop. In order to study on the effects of salinity and wild oat density on yield and yield components of wheat (Var. Roushan) a field experiment was conducted during the 2000 and 2001 growing season in the Agricultural Research Station of Birjand University. Experimental design was split plot with three replications. Treatments were: Salinity of irrigation water with four levels (1.5, 4.2, 5.5, and 10.5 dS/m in the first year and 1.5, 5.5, 7.5 and 10.5 dS/m in the second year ) and five wild oat density (0, 20, 40, 80 and 160 plants /m2 ). Wheat density was 400 p/m2. Results showed that grain weight, grain yield and relative grain yield decreased significantly by salinity. However, number of spike /m2 , number of grain in spike and harvest index were not significantly affected by salinity. Grain weight in the second year, grain yield and relative grain yield decreased significantly by wild oat density. Nevertheless, number of spike/m2, number of grain /spike, grain weight in the first year and harvest index were not affected significantly by wild oat density. Generally, results of this experiment showed that ability of wild oat competition can reduce under high salinity condition. Bell, A.R. & Nalewaja, J.D. 1968. Weed Science 16:505-508; Botella, M.A. et al. 1993. Agronomy Journal 85:1044-1049; Carlson, H.L. & Hill, J.E. 1985. Weed Science 34:29-33; Cundey, O.W. et al. 1989. Weed Science 7:539- 543; Caussanel, J.P. et al. 1993. Agronomie 13:815-827; Francois, L.E. et al. 1983. Agronomy Journal 76:741-744; Francois, L.E. et al. 1986. Agronomy Journal 78:1053-1058; Francois, L.E. et al. 1989. Agronomy Journal 81:707- 712.
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Claims 5
Claim · model-written summary
Salinity significantly reduced wheat grain weight, grain yield and relative grain yield.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- salinitye0
- Outcome
- grain weight, grain yield and relative grain yielde0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Results showed that grain weight, grain yield and relative grain yield decreased significantly by salinity.”
t0“wheat”
Claim · model-written summary
Salinity did not significantly affect spikes per area, grains per spike or harvest index.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- salinitye0
- Outcome
- number of spike /m2 , number of grain in spike and harvest indexe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, number of spike /m2 , number of grain in spike and harvest index were not significantly affected by salinity.”
t0“wheat”
Claim · model-written summary
Wild oat density significantly reduced second-year grain weight and grain yields.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- wild oat densitye0
- Interactor
- wild oate0weed
- Outcome
- Grain weight in the second year, grain yield and relative grain yielde0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain weight in the second year, grain yield and relative grain yield decreased significantly by wild oat density.”
t0“wheat”
Claim · model-written summary
Wild oat density did not significantly affect spikes, grains per spike, first-year grain weight or harvest index.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- wild oat densitye0
- Interactor
- wild oate0weed
- Outcome
- number of spike/m2, number of grain /spike, grain weight in the first year and harvest indexe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nevertheless, number of spike/m2, number of grain /spike, grain weight in the first year and harvest index were not affected significantly by wild oat density.”
t0“wheat”
Claim · model-written summary
High salinity reduced wild oat competitive ability.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- high salinity conditione0
- Interactor
- wild oate0weed
- Outcome
- ability of wild oat competitione0
- Direction
- reducee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Generally, results of this experiment showed that ability of wild oat competition can reduce under high salinity condition.”
t0“wheat”
The same questions in other papers
salinity · yield · Triticum aestivum (wheat)Positive and negative results
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- positive
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See all 227 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.