| Abstrakt: |
A field experiment was conducted during kharif 2019 at Junjanahalli village of Hassan district to study the effect of different levels and split application of potassium on growth and yield of maize. The experiment was laid out in RCBD design with nine treatments replicated thrice. The results revealed that application of RDF (150:75 kg/ha of N & P) + K2O@25 kg ha-1 at basal+K2O@25 kg ha-1 at knee height stage+K2O @25 kg ha-1 at tasseling significantly increased the plant height (173.78 cm), number of leaves (17.01), cob length (16.55 cm), number of rows per cob (17.73), number of kernels per cob (713.08), test weight (36.78 g), kernel yield (7880kg ha-1) and stover yield (14350 kg ha-1) at harvest. The concentration of nitrogen (0.75 and 1.21%), phosphorus (0.12 and 0.28%) and potassium (0.91 & 1.54%) was significantly higher in stover and kernel, respectively over other treatments. Similarly, higher uptake of nitrogen and potassium (202.96 kg ha-1 and 251.93g ha-1, respectively) were recorded in RDF of N:P2O5 and K2O@25 kg ha-1 at basal+K2O@25 kg ha-1 at 30 DAS+K2O @ 25 kg ha-1 60 DAS. The nutrient status after harvest of crop differed significantly due to different levels and split application of potassium. However, significantly higher nitrogen ( 274.86 kg/ha), phosphorus ( 57.04 kg/ha) and potassium ( 206.25 kg/ha) were recorded in treatment receiving RDF N:P2O5 (150:75 kg/ha) +K2O@25 kg ha-1 at basal+K2O@25 kg ha-1 at knee height stage+K2O @25 kg ha-1 at tasseling. Higher gross returns (160835 Rs.ha-1), net returns (112241.66 Rs.ha-1) and cost benefit ratio (3.28) were obtained for recommended dose of N,P2O5+K2O@25 kg ha-1 at basal+K2O@25 kg ha-1 at knee height stage+K2O @25 kg ha-1 at tasseling. [ABSTRACT FROM AUTHOR] |
