INTERACTIVE EFFECT OF NITROGEN, PHOSPHORUS AND
CUTTING MANAGEMENT ON MICRO NUTRIENTS UPTAKE BY OAT
(AVENA SATIVA L.)
PREETI MALIK*, B. S DUHAN,** L. K. MIDHA* AND
HARDEEP SINGH SHEORAN**
Department of Agronomy, CCSHAU, Hisar-125004
Department of Soil Science, CCSHAU, Hisar-125004
(e-mail: dr.bsduhan@gmail.com)
(Received : 7 January 2015; Accepted : 15 Feruary 2015)
SUMMARY
Although, no micro nutrient has been applied to the crop but the effect of cutting management, nitrogen and phosphorus application on micro nutrients uptake was studied in the field experiment on oat. Results indicated that the highest zinc uptake by oat fodder (19.6 g/ha) was recorded when oat was cut 70 DAS (Day after sowing) followed by cut 60 DAS (17.6 g/ha) and then cut 50 DAS (15.7 g/ha). Whereas, highest zinc uptake by oat grain (24.7 g/ha) was recorded when oat was cut 60 DAS followed by cut 50 DAS (22.5 g ha-1) and least by cut 70 DAS (21.1 g a). Zinc uptake by oat straw was recorded highest when oat was cut 50 DAS (36.0 g/ha) followed by cut 70 DAS (30.5 g/ha) and then cut 60 DAS (35.0 g/ha). Similar trend was also observed in case of copper, manganese and iron uptake by oat fodder, grain and straw with different cutting managements. Zinc uptake by fodder, grain and straw increased significantly from 11.7, 19.3 and 31.4 to 23.4, 25.9 and 36.5 g/ha respectively, with the treatment N120+P60 over control, N40+ P20 and N80+P40 treatments. Application of nitrogen and phosphorus significantly increased the copper uptake in oat fodder, grain and straw from 7.2, 8.3 and 19.4 to 14.5, 11.1 and 22.6 g ha-1 respectively with N120+P60 over all other treatments. Manganese uptake by oat fodder, grain and straw also increased from 12.8, 15.6 and 34.2 to 25.5, 20.9 and 39.8 g/ha respectively with the application of N120+P60. Application of nitrogen and phosphorus significantly increased the iron uptake in oat fodder, grain and straw from 68.1, 144.7 and 182.4 to136.1, 193.8 and 212.5 g/ ha respectively with N120+P60.
Key words:Zinc, copper, manganese, iron, micro nutrients uptake, fertility levels, cutting management