Effect of nitrogen management on growth, yield attributes and yield of lowland rice-ADT 43 {Oryza sativa L.}
1*Joshita Nongthombam, 2R. Gobi, 3A. Balasubramanian and 4S. Sathiyamurthi
1*,2,3Department of Agronomy and 4Department of Soil Science and Agricultural Chemistry, Faculty of Agriculture, Annamalai University, Annamalai Nagar-608002 (India) *Corresponding author: e-mail: joshitanong123@gmail.com
ABSTRACT
A Field experiment was conducted at Experimental Farm, Department of Agronomy, Faculty of Agriculture, Annamalai University, Annamalai Nagar during the year 2021- 2022 to study the effect of different levels and split application of nitrogen on growth and yield of lowland rice. The experiments were laid out in randomized block design {RBD} with three replications. The treatments details are T1 – Control, T2 – 100% RDN through Urea {120 kg/ha}, T3 – 75% RDN through Urea {90 kg/ha}, T4 – 125% RDN through Urea {150 kg/ha}, T5 – 100% RDN {50% N basal + LCC4 @ 25kg N/ha through Urea}, T6 – 75% RDN {50% N basal + LCC4 @ 25kg N/ha through Urea}, T7 – 125% RDN {50% N basal + LCC4 @ 25kg N/ha through Urea}, T8 – 100% RDN {50% N basal through Urea + LCC4 @ Nano urea 600 ml/ha}, T9 – 75% RDN {50% N basal through Urea + LCC4 @ Nano urea 600 ml/ha} and T10 – 125% RDN {50% N basal through Urea + LCC4 @ Nano urea 600 ml/ha}. Among the different treatments tried, T7 treatment [125% RDN {50% N basal + LCC4 @ 25kg N/ha through Urea}] recorded the higher plant height {103.21 cm}, LAI {5.62}, CGR {7.40 g m-2 day-1}, DMP {11940 kg ha-1}, number of tillers m-2 {530.19}, number of panicles m-2 {377.87}, number of filled grains panicle-1 {108.26}, grain yield {5450 kg ha-1} and straw yield {7125 kg ha-1}.