Abstract
Maize (Zea mays L.) is an important component of global food security but its production is threatened by abiotic stresses in climate change scenarios, especially drought stress. Many multinational companies have introduced maize hybrids worldwide which have variable performance under diverse environmental conditions. The maize production is likely to be affected by a future water crisis. Potassium (K) is a well-known macronutrient which improves the performance of cereals under abiotic stresses. In this field experiment, we assessed the influence of soil applied K on the productivity of diverse maize hybrids grown under well-watered and drought stress conditions. The study consisted of three K levels viz., control (no KCl), KCl at 50 kg ha−1, and KCI at 75 kg ha−1 factorally combined with two irrigation levels (i.e., normal recommended irrigation, well-watered condition, and half of the recommended irrigation, drought stress condition) and eight maize hybrids. Irrigation was kept in main plots, potassium in subplot, and maize hybrids in sub-subplots. The results revealed that performance of the maize hybrids was significantly influenced by all three factors, and the interaction of irrigation with potassium and irrigation with hybrids was significant; results being non-significant for all other interactions. Potassium application improved yield traits and water productivity under both normal and water stress conditions but effect was more prominent under water stress conditions than normal conditions. Potassium application also alleviated drought susceptibility of all maize hybrids. In all cases, the performance of maize hybrids was maximum under potassium application at 75 kg ha−1.
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Claims 7
Claim · model-written summary
Irrigation, potassium and hybrid factors significantly influenced maize hybrid performance.
Zea maysNot reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“performance of the maize hybrids was significantly influenced by all three factors”
e1“three K levels”
e2“Maize (Zea mays L.)”
Claim · model-written summary
Irrigation-by-potassium and irrigation-by-hybrid interactions were significant.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the interaction of irrigation with potassium and irrigation with hybrids was significant”
e1“Maize (Zea mays L.)”
Claim · model-written summary
All other tested factor interactions were nonsignificant.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“results being non-significant for all other interactions”
e1“Maize (Zea mays L.)”
e2“irrigation with potassium and irrigation with hybrids”
Claim · model-written summary
Potassium improved yield traits under normal and water stress conditions, more prominently under stress.
- Treatment
- Potassium applicatione0
- Outcome
- yield traitse0
- Direction
- improvede0
- Qualifier
- more prominent under water stress conditions than normal conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potassium application improved yield traits and water productivity under both normal and water stress conditions but effect was more prominent under water stress conditions than normal conditions”
e1“Maize (Zea mays L.)”
Claim · model-written summary
Potassium improved water productivity under normal and water stress conditions, more prominently under stress.
- Treatment
- Potassium applicatione0
- Outcome
- water productivitye0
- Direction
- improvede0
- Qualifier
- more prominent under water stress conditions than normal conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potassium application improved yield traits and water productivity under both normal and water stress conditions but effect was more prominent under water stress conditions than normal conditions”
e1“Maize (Zea mays L.)”
Claim · model-written summary
Potassium alleviated drought susceptibility in all maize hybrids.
- Treatment
- Potassium applicatione0
- Outcome
- drought susceptibilitye0
- Direction
- alleviatede0
- Qualifier
- all maize hybridse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Potassium application also alleviated drought susceptibility of all maize hybrids”
e1“Maize (Zea mays L.)”
Claim · model-written summary
Maize hybrid performance was maximum at potassium application of 75 kg ha−1.
- Treatment
- potassium application at 75 kg ha−1e0
- Outcome
- performance of maize hybridse0
- Direction
- maximume0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“performance of maize hybrids was maximum under potassium application at 75 kg ha−1”
e1“Maize (Zea mays L.)”
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