Vol. 7, Issue 2 (2019)
Growth regulators and nitrogen fertilization effects on performance of barley
Author(s): Mukesh Kumar and Bhagat Singh
Abstract: To study the effect of different nitrogen doses and plant growth regulators on growth, yield and yield attributes of barley, a split plot design experiment with replicated thrice was carried out during Rabi 2016-17 and 2017-18 at Wheat and Barley Research area, CCS Haryana Agricultural University, Hisar, Haryana. The treatments comprised of three doses of nitrogen viz., 100% of the recommended dose of nitrogen (RDN), 125% RDN and 150% RDN were in main plot and in sub plot four treatments of plant growth regulators (PGR) viz., control i.e. without PGR, chlormequat-chloride (CCC) @1.25 L ha-1 at GS30-31, ethephon (cerone) @ 0.5 L ha-1 at GS32-49 and combination of CCC @1.25 L ha-1 at GS30-31 + cerone @ 0.5 L ha-1 at GS32-49. On pooled mean basis of two years 2016-17 and 2017-18 data, results of the experiment revealed that among nitrogen levels highest grain and biological yield of 53.10 q/ha and 125.22 q/ha was recorded under 150% RDN, respectively, which was at par with 125% RDN (51.73 and 122.24 q/ha), but significantly superior over 100% RDN (50.48 and 118.93 q/ha). Plant height increased significantly with increased doses of nitrogen. Yield attributes viz. grains per earhead and test weight were not affected significantly by increasing doses of nitrogen. Similarly like grain yield, 150% RDN produced significantly more number of effective tillers/m2 (353.2) than 100% RDN (327.3). Among PGRs treatment, application of cycocel (Chlormequat chloride) + cerone (ethephon) produced the highest grain and biological yield of 53.25 q/ha and 124.07 q/ha, respectively, which was significantly superior over without PGR treatment (control). Maximum effective tillers/m2 (349.6) were recorded under CCC + Ethephon treatment. Maximum grains/earhead was recorded in Ethephon treatment. Test weight was not affected significantly by different PGRs treatment. Maximum harvest index (42.91%) was recorded in cycocel + cerone, which is significantly superior control. Barley produced highest grain yield with the application of 150% RDN in combination with CCC @1.25 L ha-1 at GS30-31 + cerone @ 0.5 L ha-1 at GS32-49.
Pages: 280-283 | 547 Views 60 Downloads
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How to cite this article:
Mukesh Kumar, Bhagat Singh. Growth regulators and nitrogen fertilization effects on performance of barley. Int J Chem Stud 2019;7(2):280-283.
