Abstract
To investigate the effects of nitrogen foliar application at different growth stages of soybean on the yield and yield components this experiment was performed in Shush, north of Khuzestan, Iran, during growing season of 2014. The experiment was in split plot based on randomized complete block design with three replications. Experimental treatments consisted of four levels of nitrogen fertilizer foliar applications as control (no nitrogen foliar application), 25, 50 and 75 kg/ha pure nitrogen from urea source (46% pure nitrogen) assigned to the main plots and spraying times in three levels, at vegetative stage, flowering stage and podding stage to the subplots. Results showed that the effects of nitrogen foliar application on traits measured in this experiment like leaf area index, number of pod per plant, number of seeds per pod, thousand seed weight, seed yield, biologic yield, harvest index, protein percent and protein yield and also interaction of different levels of nitrogen foliar application and different growth stages, were significant. Oil percent and yield were only significant under the effect of nitrogen foliar application treatments at different growth stages while the interaction of different levels of nitrogen foliar application and different growth stages, were not significant. In this experiment nitrogen foliar application increased seed yield. The highest seed yield amounted to 2466 kg/ha when 50kg/ha of foliar nitrogen applied at vegetative growth stage and lowest seed yield amounted to 1295 kg/ha in the control treatment at the stage of podding. In general, results demonstrated that 50 kg/ha treatment could be considered as the best management option of nitrogen foliar application for soybean at vegetative growth stage.
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Claims 9
Claim · model-written summary
Nitrogen foliar application significantly affected leaf area index, number of pods per plant and number of seeds per pod, as did the interaction with growth stage.
- Taxon
- Soybean
Glycine maxt0 - Treatment
- nitrogen foliar applicatione1
- Outcome
- leaf area index, number of pod per plant, number of seeds per pode1
- Comparator
- control (no nitrogen foliar application)e2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e1“nitrogen foliar application on traits measured in this experiment like leaf area index, number of pod per plant, number of seeds per pod”
e2“control (no nitrogen foliar application)”
Claim · model-written summary
Nitrogen foliar application significantly affected thousand seed weight, seed yield and biologic yield, as did the interaction with growth stage.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- nitrogen foliar applicatione1
- Outcome
- thousand seed weight, seed yield, biologic yielde1
- Comparator
- control (no nitrogen foliar application)e2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e1“nitrogen foliar application on traits measured in this experiment like leaf area index, number of pod per plant, number of seeds per pod, thousand seed weight, seed yield, biologic yield”
e2“control (no nitrogen foliar application)”
Claim · model-written summary
Nitrogen foliar application significantly affected harvest index, protein percent and protein yield, as did the interaction with growth stage.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- nitrogen foliar applicatione1
- Outcome
- harvest index, protein percent and protein yielde1
- Comparator
- control (no nitrogen foliar application)e2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e1“nitrogen foliar application on traits measured in this experiment like leaf area index, number of pod per plant, number of seeds per pod, thousand seed weight, seed yield, biologic yield, harvest index, protein percent and protein yield”
e2“control (no nitrogen foliar application)”
Claim · model-written summary
Oil percent and oil yield were significantly affected only by nitrogen foliar application treatments at different growth stages.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- nitrogen foliar application treatments at different growth stagese1
- Outcome
- Oil percent and yielde1
- Comparator
- control (no nitrogen foliar application)e2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e1“Oil percent and yield were only significant under the effect of nitrogen foliar application treatments at different growth stages while the interaction of different levels of nitrogen foliar application and different growth stages, were not significant”
e2“control (no nitrogen foliar application)”
Claim · model-written summary
The interaction of nitrogen foliar application levels and growth stages was not significant for oil percent and oil yield.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- interaction of different levels of nitrogen foliar application and different growth stagese1
- Outcome
- Oil percent and yielde1
- Direction
- no_changeinferrede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e1“Oil percent and yield were only significant under the effect of nitrogen foliar application treatments at different growth stages while the interaction of different levels of nitrogen foliar application and different growth stages, were not significant”
Claim · model-written summary
Nitrogen foliar application increased soybean seed yield.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- nitrogen foliar applicatione1
- Outcome
- seed yielde1
- Direction
- increasede1
- Comparator
- control (no nitrogen foliar application)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e1“nitrogen foliar application increased seed yield”
e2“control (no nitrogen foliar application)”
Claim · model-written summary
The highest seed yield, 2466 kg/ha, occurred with 50 kg/ha foliar nitrogen applied at the vegetative growth stage.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- 50kg/ha of foliar nitrogen applied at vegetative growth stagee1
- Outcome
- seed yielde1
- Direction
- higheste1
- Value
- 2466 kg/hae1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e1“The highest seed yield amounted to 2466 kg/ha when 50kg/ha of foliar nitrogen applied at vegetative growth stage”
Claim · model-written summary
The lowest seed yield, 1295 kg/ha, occurred in the control treatment at the podding stage.
- Taxon
- SoybeanGlycine maxt0
- Outcome
- lowest seed yielde1
- Value
- 1295 kg/hae1
- Qualifier
- control treatment at the stage of poddinge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Soybean”
e1“lowest seed yield amounted to 1295 kg/ha in the control treatment at the stage of podding”
Claim · model-written summary
The authors consider 50 kg/ha of foliar nitrogen at the vegetative growth stage the best management option for soybean.
- Taxon
- soybeanGlycine maxe1
- Outcome
- best management option of nitrogen foliar applicatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“50 kg/ha treatment could be considered as the best management option of nitrogen foliar application for soybean at vegetative growth stage”
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