Growth and yield of barley (Hordeum vulgare L.) varieties as influenced by application of plant growth regulators

Abstract

A field experiment entitled “Growth and yield of Barley (Hordeum vulgare L.) varieties as influenced by application of Plant growth regulators” was conducted during the rabi season of 2017-18 at research farm of Wheat & Barley Section, Dept. of Genetics and Plant Breeding, Chaudhary Charan Singh, Haryana Agricultural University, Hisar. The experiment comprised of two varieties (BH 946 & DWRUB 52) in main plot and application of PGRs alone or in combination viz. T1: Folicur (0.1%) at GS50, T2: Folicur (0.1%) at GS80, T3: Cycocel @ 1.25 l ha-1 at GS31, T4: Ethephon @ 0.5 l ha-1 at GS40 and T5: Cycocel @ 1.25 l ha-1 at GS31+ Ethephon @ 0.5 l ha-1 at GS40 in sub plot under Factorial RBD design with three replications. Variety BH-946 exhibited significantly better growth parameters viz., plant height, dry matter accumulation metre-1 row length and leaf area index (LAI) in comparison with DWRUB 52. Whereas, the grain yield and harvest index of 51.3 q ha-1and 39.2%, respectively were recorded maximum in DWRUB 52. Application of Cycocel and Ethephon, alone or in combination significantly reduced plant height and increased dry matter accumulation metre-1 row length, leaf area index (LAI) and total tillers metre-1 row length. The highest grain yield (52.5 q ha-1) and harvest index (37.7 %) were recorded under Cycocel + Ethephon.