Abstract
Khatun R, Karim SMR, Islam MS, Zaman F (2014) Determination of growth and development of barnyardgrass (Echinochloa crus-galli L. Beauv) under different allelopathic effect of rice variety. Int. J. Sustain. Crop Prod. 9(1), 11-15. An experiment was carried out at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during the period from 29 March, 2011 to 17 May, 2011 to determine the growth and development of barnyardgrass (Echinochloa crus-galli L. Beauv.) under different allelopathic effect of rice variety. Two planting systems viz. (a) Monoculture of barnyardgrass (b) Rice-branyardgrassmixculture; two level of nitrogen viz. (a) Optimum nitrogen dose (70 kg/ha) (b) No nitrogenand five varieties of rice viz. V1 = BR 3 (Biplob), V2 = BR 21 (Niamat), V3 = BR 24 (Rahmat), V4 = BRRI dhan27 and V5 = BRRI dhan47 were included as experimental treatment. The experiment was laid out in a randomized complete block design with three replications. In fields barnyardgrass was grown mixed with allelopathic rice and decreased its the allelopathic effect of rice on the growth and development of barnyardgrass (Echinochloa crus-galli L. Beauv.) number of tillers plant -1 , total dry weight (g) significantly except height due to the competitive nature of barnyardgrass. This reduction might be due to allelopathic effect of rice on barnyardgrass. Level of nitrogen had significant effect of plant height, number of tillers plant -1 and seedling emergence at all sampling dates, except height at 50 DAS. The value of each of these parameters was the highest at the optimum level of nitrogen (35 g plot -1 ) and the lowest at the lowest level of nitrogen (0 kg ha -1 ). At any level of nitrogen, plant height, numbers of tillers plant -1 of barnyardgrass at any growth stage were shorter in mix-culture than in monoculture. This means that at any level of nitrogen, rice plants exerted its allelopathic effect on barnyardgrass of any growth stage in field. In field conditions, except height number of tillers plant -1 , total dry weight plant -1 of barnyardgrass at all sampling dates and seedling emergence (at 2 and 7 DAS) of barnyardgrass decreased significantly when it was grown mixed with rice. This reduction might be due to allelopathic effect of rice on barnyardgrass. Level of nitrogen had significant effect on number of tillers plant -1 , seedling emergence of barnyardgrass at any sampling dates of barnyardgrass at 50 DAS. The highest value was observed at optimum level of nitrogen (80 kg N ha -1 ) and the lowest at lowest level of nitrogen (0 kg N ha -1 ). Interaction effect of system of planting and level of nitrogen was significant in respect of parameters related to growth and development of barnyardgrass, but plant height was not significant. Seeding emergence number of tillers plant -1 of barnyardgrass was significantly lower in mixculture than those in monoculture.
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Claims 7
Claim · model-written summary
Mix culture with rice reduced barnyardgrass tiller number and total dry weight, but not height.
- Taxon
- barnyardgrass
Echinochloa crus-gallie0 - Treatment
- grown mixed with allelopathic ricee0
- Interactor
- rice
Oryza sativae0weed - Outcome
- number of tillers plant -1 , total dry weight (g)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In fields barnyardgrass was grown mixed with allelopathic rice and decreased its the allelopathic effect of rice on the growth and development of barnyardgrass (Echinochloa crus-galli L. Beauv.) number of tillers plant -1 , total dry weight (g) significantly except height due to the competitive nature of barnyardgrass.”
Claim · model-written summary
Nitrogen level significantly affected height, tiller number and seedling emergence; values were highest at optimum nitrogen.
- Taxon
- BARNYARDGRASSEchinochloa crus-gallit0
- Treatment
- optimum level of nitrogen (35 g plot -1 )e0
- Outcome
- plant height, number of tillers plant -1 and seedling emergencee0
- Direction
- higheste0
- Qualifier
- except height at 50 DASe0
- Comparator
- lowest level of nitrogen (0 kg ha -1 )e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Level of nitrogen had significant effect of plant height, number of tillers plant -1 and seedling emergence at all sampling dates, except height at 50 DAS. The value of each of these parameters was the highest at the optimum level of nitrogen (35 g plot -1 ) and the lowest at the lowest level of nitrogen (0 kg ha -1 ).”
t0“BARNYARDGRASS”
Claim · model-written summary
Barnyardgrass height and tiller number were lower in rice mix culture than monoculture at any nitrogen level.
- Taxon
- barnyardgrassEchinochloa crus-gallie0
- Treatment
- mix-culturee0
- Outcome
- plant height, numbers of tillers plant -1e0
- Direction
- shortere0
- Qualifier
- At any level of nitrogene0
- Comparator
- monoculturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At any level of nitrogen, plant height, numbers of tillers plant -1 of barnyardgrass at any growth stage were shorter in mix-culture than in monoculture.”
Claim · model-written summary
Rice mix culture significantly lowered barnyardgrass tiller number, dry weight and seedling emergence.
- Taxon
- barnyardgrassEchinochloa crus-gallie0
- Treatment
- grown mixed with ricee0
- Outcome
- number of tillers plant -1 , total dry weight plant -1e0
- Direction
- decreasede0
- Qualifier
- at all sampling datese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In field conditions, except height number of tillers plant -1 , total dry weight plant -1 of barnyardgrass at all sampling dates and seedling emergence (at 2 and 7 DAS) of barnyardgrass decreased significantly when it was grown mixed with rice.”
Claim · model-written summary
Optimum nitrogen yielded higher barnyardgrass tiller number and seedling emergence than zero nitrogen.
- Taxon
- barnyardgrassEchinochloa crus-gallie0
- Treatment
- optimum level of nitrogen (80 kg N ha -1 )e0
- Outcome
- number of tillers plant -1 , seedling emergencee0
- Direction
- higheste0
- Comparator
- lowest level of nitrogen (0 kg N ha -1 )e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Level of nitrogen had significant effect on number of tillers plant -1 , seedling emergence of barnyardgrass at any sampling dates of barnyardgrass at 50 DAS. The highest value was observed at optimum level of nitrogen (80 kg N ha -1 ) and the lowest at lowest level of nitrogen (0 kg N ha -1 ).”
Claim · model-written summary
Planting system and nitrogen level interacted significantly for barnyardgrass growth parameters except height.
- Taxon
- barnyardgrassEchinochloa crus-gallie0
- Treatment
- system of planting and level of nitrogene0
- Outcome
- parameters related to growth and developmente0
- Qualifier
- but plant height was not significante0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Interaction effect of system of planting and level of nitrogen was significant in respect of parameters related to growth and development of barnyardgrass, but plant height was not significant.”
Claim · model-written summary
Barnyardgrass seedling emergence and tiller number were significantly lower in mix culture.
- Taxon
- barnyardgrassEchinochloa crus-gallie0
- Treatment
- mixculturee0
- Outcome
- Seeding emergence number of tillers plant -1e0
- Direction
- lowere0
- Comparator
- monoculturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seeding emergence number of tillers plant -1 of barnyardgrass was significantly lower in mixculture than those in monoculture.”
The same questions in other papers
Oryza sativa · yield · Echinochloa crus-galli (barnyard grass)Results agree
1 paper in the same direction as this paper
- positive
nitrogen · growth · Echinochloa crus-galli (barnyard grass)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
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.