Abstract
A 2-year field experiment (2013 and 2014) was conducted in calcareous soil (CaCO3 19.2%), on soybean grown under three irrigation regimes 100%, 85% and 70% of crop evapotranspiration combined with three potassium (K2O) levels (90, 120 and 150 kg ha−1). The objective was to investigate the complementary properties of potassium fertilizer in improving soybean physiological response under water deficit. Plant water status (relative water content RWC, chlorophyll fluorescence Fv/F0 and Fv/Fm), had been significantly affected by irrigation or/and potassium application. Potassium improved growth characteristics (i.e. shoot length, number, leaf area and dry weight of leaves) as well as physiochemical attributes (total soluble sugars, free proline and contents of N, P, K, Ca and Na). Yield and yield water use efficiency (Y-WUE) were significantly affected by irrigation and potassium treatments. Results indicated that potassium application of 150 and 120 kg ha−1 significantly increased seed yield by 29.6% and 13.89%, respectively, compared with 90 kg ha−1 as average for two seasons. It was concluded that application of higher levels of potassium fertilizer in arid environment improves plant water status as well as growth and yield of soybean under water stress.
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Claims 8
Claim · model-written summary
Plant water status of soybean was significantly affected by irrigation or potassium application.
- Taxon
- soybean
Glycine maxe0 - Treatment
- irrigation or/and potassium applicatione1
- Outcome
- Plant water statuse1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on soybean grown under three irrigation regimes”
e1“Plant water status (relative water content RWC, chlorophyll fluorescence Fv/F0 and Fv/Fm), had been significantly affected by irrigation or/and potassium application”
Claim · model-written summary
Potassium improved growth characteristics of soybean.
- Taxon
- soybeanGlycine maxe0
- Treatment
- Potassiume3
- Outcome
- growth characteristicse3
- Direction
- improvede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on soybean grown under three irrigation regimes”
e3“Potassium improved growth characteristics (i.e. shoot length, number, leaf area and dry weight of leaves) as well as physiochemical attributes (total soluble sugars, free proline and contents of N, P, K, Ca and Na)”
Claim · model-written summary
Potassium improved total soluble sugars and free proline of soybean.
- Taxon
- soybeanGlycine maxe0
- Treatment
- Potassiume3
- Outcome
- total soluble sugars, free prolinee3
- Direction
- improvede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on soybean grown under three irrigation regimes”
e3“Potassium improved growth characteristics (i.e. shoot length, number, leaf area and dry weight of leaves) as well as physiochemical attributes (total soluble sugars, free proline and contents of N, P, K, Ca and Na)”
Claim · model-written summary
Potassium improved the contents of N, P, K, Ca and Na in soybean.
- Taxon
- soybeanGlycine maxe0
- Treatment
- Potassiume3
- Outcome
- contents of N, P, K, Ca and Nae3
- Direction
- improvede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on soybean grown under three irrigation regimes”
e3“Potassium improved growth characteristics (i.e. shoot length, number, leaf area and dry weight of leaves) as well as physiochemical attributes (total soluble sugars, free proline and contents of N, P, K, Ca and Na)”
Claim · model-written summary
Yield and yield water use efficiency of soybean were significantly affected by irrigation and potassium treatments.
- Taxon
- soybeanGlycine maxe0
- Treatment
- irrigation and potassium treatmentse4
- Outcome
- Yield and yield water use efficiency (Y-WUE)e4
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on soybean grown under three irrigation regimes”
e4“Yield and yield water use efficiency (Y-WUE) were significantly affected by irrigation and potassium treatments”
Claim · model-written summary
Potassium application of 150 kg ha−1 significantly increased soybean seed yield by 29.6% compared with 90 kg ha−1.
- Taxon
- soybeanGlycine maxe0
- Treatment
- potassium application of 150e5
- Outcome
- seed yielde5
- Direction
- increasede5
- Value
- 29.6%e5
- Comparator
- 90 kg ha−1e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on soybean grown under three irrigation regimes”
e5“potassium application of 150 and 120 kg ha−1 significantly increased seed yield by 29.6% and 13.89%, respectively, compared with 90 kg ha−1 as average for two seasons”
Claim · model-written summary
Potassium application of 120 kg ha−1 significantly increased soybean seed yield by 13.89% compared with 90 kg ha−1.
- Taxon
- soybeanGlycine maxe0
- Treatment
- 120 kg ha−1e5
- Outcome
- seed yielde5
- Direction
- increasede5
- Value
- 13.89%e5
- Comparator
- 90 kg ha−1e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on soybean grown under three irrigation regimes”
e5“potassium application of 150 and 120 kg ha−1 significantly increased seed yield by 29.6% and 13.89%, respectively, compared with 90 kg ha−1 as average for two seasons”
Claim · model-written summary
Higher potassium fertilizer application in arid environments is recommended to improve soybean water status, growth and yield under water stress.
- Taxon
- soybeanGlycine maxe6
- Outcome
- application of higher levels of potassium fertilizere6
- Setting
- arid environmente6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“application of higher levels of potassium fertilizer in arid environment improves plant water status as well as growth and yield of soybean under water stress”
The same questions in other papers
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See all 36 papers →potassium · physiology: osmolytes · Glycine max (soybean)Results agree
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- 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.