Abstract
In order to study the effect of potassium sulfate on potassium accumulation in leaves and stomatal behavior under deficit irrigation in cowpeas, a split plot experiment in randomized complete block design with three replications was carried out in Shahid Salemi field in Ahvaz at longitude 48°40´ east and latitude 31°20´ north and 22.5 m above the sea level in the summer of 2012. The experiment factors involved the main plot including three levels of deficit irrigation (irrigation at 70, 100 and 150 mm evaporation from class A evaporation pan) and the sub plot included four levels of potassium sulfate (0 kg/ha, 50 kg/ha, 100 kg/ha and 150 kg/ha). Each replication included 12 plots so the experiment included 36 experimental units. Stomatal conductance was measured at flowering stage by porometer. The results showed that the effect of deficit irrigation on stomatal conductance was significant and the highest conductance belonged to the treatment with irrigation at 70 mm evaporation. Moreover, the effect of different levels of potassium sulfate on stomatal conductance was significant and the highest stomatal conductance belonged to the treatment with 100 kg/ha potassium sulfate fertilizer.The interactive effects of different levels of deficit irrigation and potassium sulfate fertilizer on all the measured traits were significant. It could be said that among the applied treatments, irrigation at 70 mm evaporation and 100 kg/ha potassium sulfate fertilizer is the best treatment for cowpeas under Ahvaz weather conditions and is the most effective.
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Claims 4
Claim · model-written summary
Deficit irrigation significantly affected cowpea stomatal conductance, which was highest at irrigation at 70 mm evaporation.
- Taxon
- cowpeas
Vigna unguiculatae1 - Organ / stage
- flowering stagee2
- Treatment
- irrigation at 70 mm evaporatione0
- Outcome
- stomatal conductancee0
- Direction
- higheste0
- Setting
- Ahvaze1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effect of deficit irrigation on stomatal conductance was significant and the highest conductance belonged to the treatment with irrigation at 70 mm evaporation”
e1“stomatal behavior under deficit irrigation in cowpeas, a split plot experiment in randomized complete block design with three replications was carried out in Shahid Salemi field in Ahvaz at longitude 48°40´ east and latitude 31°20´ north and 22.5 m above the sea level in the summer of 2012.”
e2“Stomatal conductance was measured at flowering stage by porometer”
Claim · model-written summary
Potassium sulfate significantly affected stomatal conductance, highest at 100 kg/ha.
- Taxon
- cowpeasVigna unguiculatae1
- Treatment
- 100 kg/ha potassium sulfate fertilizere0
- Outcome
- stomatal conductancee0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effect of different levels of potassium sulfate on stomatal conductance was significant and the highest stomatal conductance belonged to the treatment with 100 kg/ha potassium sulfate fertilizer”
e1“in cowpeas”
Claim · model-written summary
Irrigation and potassium sulfate levels had significant interactive effects on all measured traits.
- Taxon
- cowpeasVigna unguiculatae1
- Treatment
- different levels of deficit irrigation and potassium sulfate fertilizere0
- Outcome
- all the measured traitse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The interactive effects of different levels of deficit irrigation and potassium sulfate fertilizer on all the measured traits were significant”
e1“in cowpeas”
Claim · model-written summary
The authors recommend irrigation at 70 mm evaporation with 100 kg/ha potassium sulfate for cowpeas under Ahvaz conditions.
- Taxon
- cowpeasVigna unguiculatae0
- Treatment
- irrigation at 70 mm evaporation and 100 kg/ha potassium sulfate fertilizere0
- Outcome
- best treatmente0
- Setting
- Ahvaze0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“irrigation at 70 mm evaporation and 100 kg/ha potassium sulfate fertilizer is the best treatment for cowpeas under Ahvaz weather conditions”
The same questions in other papers
irrigation · physiology: gas exchange · Vigna unguiculata (cowpea)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- positive
1 paper more in this group
See all 5 papers →fertilization · physiology: gas exchange · Vigna unguiculata (cowpea)Results agree
1 paper in the same direction as this paper
- 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.