Journal of Environmental Biology

Comparative response of sorghum genotypes to varied levels of nitrogen in rice-fallows of North Coastal Region of Andhra Pradesh

B.S.S.S. Naik¹*, K.R. Murthy² and T. Rupesh³ 

¹Department of Agronomy, Acharya N.G. Ranga Agricultural University, Naira-532 185, India

²Department of Agronomy, Acharya N.G. Ranga Agricultural University, RARS, Ragolu-532 484, India

³Department of Soil Science and Agricultural Chemistry, Maharana Prathap University of Agriculture and Technology, Udaipur-313 001, India

*Corresponding Author Email : siddunaik08@gmail.com ????????

Paper received: 13.06.2020 ?????? ???????????????????????????????????????Revised received: 03.10.2020 ???????????? ?????????????????????????????????????Accepted: 30.10.2020

Abstract

Aim: The objective of this research was to find a suitable variety and amount of nitrogen to work out their best combination for accomplishing higher productivity of Sorghum under rice fallow environment in Coastal Zone of South India.

Methodology: An experimental trial was carried out with four sorghum genotypes viz., V₁- CSH 15R, V₂- CSH 16, V₃- CSH 25 and V₄- MLSH 296 and four nitrogen doses viz., N₁: 0 kg N ha^-1, N₂: 80 kg N ha^-1, N₃: 100 kg N ha^-1 and N₄: 120 kg N ha^-1.The investigation was outlined in split plot design with three replications. ??

Results: Rice fallow sorghum genotype CSH 25 and supplementation of 120 kg N ha^-1 had outstandingly recorded the highest grain weight, higher grain yield and physiological recovery of nitrogen among other genotypes. Nonetheless, in contrast to this, fodder yield was highest with hybrid CSH 15R at 120 kg ha^-1, but apparent recovery of nitrogen (%) and soil harvest nitrogen had recorded highest in CSH 16 at same level of nitrogen (120 kg ha^-1).      

Interpretation: It can be terminated that sorghum growers under rice fallow conditions can opt for sorghum genotype CSH 25 (V₃) with the supplementation of 120 kg N ha^-1 (N₄) for? higher yield under rice fallow ecology of North Coastal Region of Andhra Pradesh in South India.          

Key words: genotypes, grain yield, rice-fallow,? Sorghum

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