Performance of compact cotton (Gossypium hirsutum L.) genotypes to varied nutrient levels under high density planting system in winter irrigated condition

Abstract

A field study was conducted during winter season (August-January) of 2018-19 in Tamil Nadu Agricultural University, Coimbatore to study the influence of compact cotton (Gossypium hirsutum L.) genotypes to varied nutrient levels under high density planting system. There were twelve treatment combinations, containing three variety/genotype in main plot (M1-CO 15, M2- TCH 1819 and M3- TCH 1822) and four nutrient levels in sub plots (S1- 100% Recommended dose of fertilizer (RDF), S2- 125%RDF, S3- 150%RDF and S4-STCR based recommendation and the experiment was replicated thrice in a split plot design. The results revealed that growth of cotton crop like plant height, leaf area index and drymatter production was higher in CO 15 variety than other genotypes. Genotype TCH 1822 recorded higher yield (2335 kgha-1) with higher boll weight (4.72 gboll-1) than others. Application of 150% RDF (100:50:50 kg NPKha-1) recorded higher growth parameters while application of 125% RDF (100:50:50 kg NPKha-1) recorded higher yield (2324 kgha-1) with more number of bollsplant-1 (13.78) and higher boll weight (4.53 gboll-1) over other levels.