Author(s):

KR Siddagangamma, AS Channabasavanna, K Narayana Rao, MY Ajayakumar, GS Yadahalli and Mahadevaswamy

Abstract: A field experiment was conducted to evaluate the production potential and nutrient uptake of Bt cotton genotypes as influenced by different establishment methods during 2018-19 and 2019-20, at Agricultural Research Station, Malnoor, University of Agricultural Sciences, Raichur, which is situated in Upper Krishna Project area of Karnataka. The experiment was laid out in split plot design with three replications. There were 12 treatments combinations. Main plot treatments consisted of three Bt cotton genotypes i.e., Jaadoo BG II, ACH 199 BG II and Bindass BG II. Sub plot treatments consisted of four methods of establishments namely, seedlings raised in black polythene bags, seedlings raised in pro trays, seedlings raised in biodegradable paper cups and dibbling (direct sowing). The data revealed that significantly higher seed cotton yield was recorded in Jaadoo BG II seedlings were raised in black polythene bags (3140 kg ha^-1) followed by ACH 199 BG II seedlings were raised in black polythene bags (3099 kg ha^-1), Jaadoo BG II seedlings were raised in biodegradable paper cups (3124 kg ha^-1) and ACH 199 BG II seedlings were raised in biodegradable paper cups (3087 kg ha^-1) which were found on par with each other. The yield increase was due to increase in number of bolls per plant, boll weight and seed cotton yield per plant. Significantly higher nutrient uptake was recorded in Jaadoo BG II and it was on par with ACH 199 BG II. Among methods of establishment, uptake of NPK were significantly higher in transplanted seedlings were raised in black polythene bags and biodegradable paper cups which were on par with each other. Transplanting ensures timely planting and higher uptake of resources in the soil.

DOI: 10.22271/phyto.2020.v9.i6r.13119

Pages: 1230-1232  |  623 Views  239 Downloads

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