Optical Characteristics, Thermal use Efficiency, Yield and Yield Attributes of Bt Cotton under Different Plant Spacing and Fertilizer Levels

Amit Singh *

Department of Agricultural Meteorology, Chaudhary Charan Singh Haryana Agricultural University, Hisar-125 004, India.

M. L. Khichar

Department of Agricultural Meteorology, Chaudhary Charan Singh Haryana Agricultural University, Hisar-125 004, India.

Ram Niwas

Department of Agricultural Meteorology, Chaudhary Charan Singh Haryana Agricultural University, Hisar-125 004, India.

. Mamta

Department of Agricultural Meteorology, Chaudhary Charan Singh Haryana Agricultural University, Hisar-125 004, India.

Kapil Malik

Department of Agronomy, Chaudhary Charan Singh Haryana Agricultural University, Hisar-125 004, India.

. Rahul

Department of Agricultural Meteorology, Chaudhary Charan Singh Haryana Agricultural University, Hisar-125 004, India.

. Manjeet

Department of Agricultural Meteorology, Chaudhary Charan Singh Haryana Agricultural University, Hisar-125 004, India.

*Author to whom correspondence should be addressed.


Abstract

Field trail was conducted at the Research Farm of Cotton Section, Department of Genetics & Plant Breeding, CCS HAU, Hisar (Lat 2910' N, Long 7546' E and 215.2 m msl) during Kharif season of 2015. The experiment was conducted in split-split plot design with three replications. Three varieties viz. V1=RCH 602, V2=RCH 650 and V3=Bunty were kept in main plots while three spacing viz. S1=67.5 cm × 45 cm, S2=67.5 cm × 60 cm and S3=67.5 cm × 75 cm with three fertilizer levels i.e. F1=RDF, F2=125 % of RDF and F3=150 % of RDF application of the recommended dose were kept in subplots. Recommended dose of fertilizer (RDF) was N:P:K=175:60:60 kg ha-1. Optical characteristics, thermal use efficiency (TUE) were computed along with yield and yield attributes were also studied. V1 (86.6 %), S3 (84.8 %) and F3 (85.1 %) absorbed maximum PAR among all the cv., plant spacing and fertilizer levels. TUE was found higher in the V1 (0.35 g/m²/℃ day), S3 (0.34 g/m²/℃ day) and F3 (0.29 g/m²/℃ day) among all the cv., plant spacing and fertilizer levels. Number of bolls plant-1 were found higher in V1 (21.0), S3 (14.7) and F3 (16.0) among all the cv., plant spacing and fertilizer levels. Among all the cv., plant spacing and fertilizer levels boll weight (g) were found higher in V2 (3.89 g), S2 (3.66 g) and F2 (3.62 g). Sympodial branches plant-1 at harvest were found highest in V1 (23.7), S1 (21.0) and F1 (21.4) among all the cv., plant spacing and fertilizer levels. In seed cotton yield V1 (1248.7 kg ha-1), S3 (1120.7 kg ha-1) and F2 (1094.3 kg ha-1) have the maximum yield as compare to other cv., plant spacing and fertilizer levels.

Keywords: TUE, optical characteristic, yield and yield attributes


How to Cite

Singh, Amit, M. L. Khichar, Ram Niwas, . Mamta, Kapil Malik, . Rahul, and . Manjeet. 2021. “Optical Characteristics, Thermal Use Efficiency, Yield and Yield Attributes of Bt Cotton under Different Plant Spacing and Fertilizer Levels”. International Journal of Plant & Soil Science 33 (9):35-41. https://doi.org/10.9734/ijpss/2021/v33i930464.