Abstract
Potassium is one of the major nutritive element which will require greater attention in order to ensure grain yield and mitigation of biotic and abiotic stresses as well as improvement in quality of maize. The soils with high in calcium and or magnesium may require high levels of K for satisfactory nutrition of crops. The availability of K depends on concentration relative to that of Ca2+ and Mg2+ than on the total quantity of K present. To study the influence of potassium levels and its influence on growth, yield and nutrient uptake in maize, a pot culture experiment was carried out with graded levels of potassium (T1 – control, T2 – 40 kg K2O ha-1, T3 – 80 kg K2O ha-1, T4 -120 kg K2O ha-1) to study the influence of potassium on growth, yield and nutrient uptake of maize in calcareous soil. The results indicated that plant height showed significant response up to 40 kg K2O ha-1, whereas SPAD values and Leaf area index were higher up to 80 kg K2O ha-1 while the root parameters showed significant response up to 120 kg K2O ha-1.Yield parameters viz., cob length and 100 grain weight were significantly influenced up to 120 kg K2O ha-1. Whereas, cob girth and rows per cob responded only up to 80 kg K2O ha-1. Grain and stover yield of hybrid maize showed significant response up to 120 kg K2O ha-1. The total uptake of N, P and K showed significant response up to 120 kg ha-1 in calcareous soil. Significant positive correlation occurs between growth, yield parameters, NPK uptake. Application of potassium up to 120 kg K2O ha-1 is necessary for the continuous supply of K to maize and to maintain K equilibrium in soil.
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Claims 9
Claim · model-written summary
Maize plant height responded significantly up to 40 kg K2O ha-1.
Not reportedTaxonComparatorDirection
Verbatim
e0“plant height showed significant response up to 40 kg K2O ha-1”
Claim · model-written summary
SPAD values and leaf area index were higher up to 80 kg K2O ha-1.
Not reportedTaxonComparator
Verbatim
e0“SPAD values and Leaf area index were higher up to 80 kg K2O ha-1”
Claim · model-written summary
Root parameters responded significantly up to 120 kg K2O ha-1.
Not reportedTaxonComparatorDirection
Verbatim
e0“root parameters showed significant response up to 120 kg K2O ha-1”
Claim · model-written summary
Cob length and 100 grain weight responded significantly up to 120 kg K2O ha-1.
Not reportedTaxonComparatorDirection
Verbatim
e0“cob length and 100 grain weight were significantly influenced up to 120 kg K2O ha-1”
Claim · model-written summary
Cob girth and rows per cob responded only up to 80 kg K2O ha-1.
Not reportedTaxonComparatorDirection
Verbatim
e0“cob girth and rows per cob responded only up to 80 kg K2O ha-1”
Claim · model-written summary
Grain and stover yield responded significantly up to 120 kg K2O ha-1.
Zea maysNot reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain and stover yield of hybrid maize showed significant response up to 120 kg K2O ha-1”
Claim · model-written summary
Total nitrogen, phosphorus and potassium uptake responded significantly up to 120 kg ha-1.
Not reportedTaxonComparatorDirection
Verbatim
e0“The total uptake of N, P and K showed significant response up to 120 kg ha-1 in calcareous soil”
Claim · model-written summary
Growth, yield parameters and NPK uptake were positively correlated.
Not reportedTaxonOrgan / stage
Verbatim
e0“Significant positive correlation occurs between growth, yield parameters, NPK uptake”
Claim · model-written summary
The authors recommend potassium up to 120 kg K2O ha-1 to maintain maize potassium supply and soil equilibrium.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of potassium up to 120 kg K2O ha-1 is necessary for the continuous supply of K to maize and to maintain K equilibrium in soil”
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