Vol. 18 No. 1
Impact of nutrients and biofertilizers on flowering in tomato under elevated CO2 induced high temperature condition
Author(s): A. S. Arunima, R. V. Manju, M. M. Viji, S. Roy, S. Sarada and R. Beena
Abstract: The study aimed at investigating the effect of elevated CO2 induced high temperature on flowering in tomato variety Vellayani Vijay and it’s improvement through the application of various nutrients and biofertilizers. A pot culture study was done with treatments - 50 ppm B + 50 ppm Zn+ water spray (T1), 75 ppm B + 75 ppm Zn (T2), POP 150% N + 125 % P+ 125% K (T3), Azolla (Soil application) (T4), Azolla bio-fertilizer extract (20%) (Foliar application) (T5), Azolla bio-fertilizer extract (20%) (Seed treatment) (T6), POP, KAU + PGPR1 (T7), Control (water spray) (T8), Absolute control (T9).The flowering was delayed and number of flower clusters were improved under elevated CO2 condition. The foliar application of 50ppm Boron + 50 ppm Zinc + water spray, application of 50% extra N and 25% extra phosphorus and potassium each than the recommended doses as per package of practices (Kerala Agricultural University) and foliar application of 20% Azolla bio-fertilizer extract were found to improve the number of flower clusters and number of flowers per cluster.