Influence of growth regulators on thermal energy requirement at various phenophases in transgenic cotton

Nawalkar, D. P.; Ban, Y. G.; Mote, B. M.; Kumar, Vineet

doi:10.54386/jam.v17i2.1019

J. Agrometeorol.

2015

DOI: 10.54386/jam.v17i2.1019

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Influence of growth regulators on thermal energy requirement at various phenophases in transgenic cotton

D. P. Nawalkar

Y. G. Ban

B. M. Mote

et al.

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“…Therefore, the selection of specific cultivar for different sowing windows is another important factor. Bt cotton cultivars require lesser time for maturity having better source-sink ratio, heat use efficiency and hence, lead to higher seed cotton yield (SCY) over non Bt cultivars (Nawalkar et al, 2015;Thakur et al, 2017). In cotton, studies on comparative evaluation of the temperature based thermal units on Bt and non Bt cotton are limited.…”

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Thermal Unit Consumption of Cotton under Different Sowing Conditions in South Western Punjab

Kaur,

Mishra,

Singh

et al. 2023

Agricultural Research Journal

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To understand the impact of weather variability on phenological development and cotton yield efficiency, a field experiment was conducted during kharif 2015, 2016 and 2017, comprising three sowing dates (April 20, May 10 and May 30) in main plots and four diverse cotton cultivars [two Bt hybrids (NCS 855 BGII and RCH 650 BGII) and two non Bt genotypes (F 2228 and F 1861)] in sub plots of the split plot design with three replications. Results indicated that April sown crop acquired more growing degree days (2548-2664°C day), better heat use efficiency (1.09-1.15 kg ha -1 °C day -1 ), and the pheno-thermal index (15.04-15.95°C) having significantly higher above ground biomass (7308-7985 kg ha -1 ) as well as seed cotton yield (2887-3054 kg ha -1 ) as compared to late sowing. Due to earlier completion of phenological duration, the Bt hybrids (NCS 855 BGII and RCH 650 BGII) exhibited superiority in thermal units conversion and economic yield over both non Bt cultivars. Thus, for effective utilization of the available thermal resources and to mitigate the adverse effects of harsh weather conditions on cotton productivity, the sowing of cotton should be done in April month in southwestern Punjab.

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confidence: 99%

Thermal Unit Consumption of Cotton under Different Sowing Conditions in South Western Punjab

Kaur,

Mishra,

Singh

et al. 2023

Agricultural Research Journal

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Assessment of production potential of long-linted Gossypium arboreum L. genotypes under different sowing times

2021

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Background Gossypium arboreum is one of the cultivated diploids which has inherent resistance against insect pests and diseases, can withstand moisture stress, needs less nutrients and is suitable for erratic, less rainfall and marginal soils. Due to its smaller boll size and poor locule retentivity, adoption of species by farmers is very low. So, best long-linted G. arboreum genotypes with high yielding potential and suitable sowing time will be identified for rainfed tracts of cotton cultivated areas in India. Results The pooled analysis results found that the significantly highest mean seed cotton yield was recorded with Phule Dhanwanthry (1069 kg/ha) which was on par with K12 (1027 kg/ha), DLSA 17 (977 kg/ha) and PA 812 (951 kg/ha). Planting at 4 August yielded the significantly higher seed cotton yield (1345 kg/ha) in comparison with 4 September sowing (536 kg/ha). The interaction results in pooled data revealed that Genotype PA 812 planted at 4 August registered the significantly highest seed cotton yield (1487 kg/ha) which was on par with all genotypes sown on 4 August except PA 402. Amongst long-linted genotypes, PA 760 recorded the significantly highest upper half length (29.9 mm), mean length (24.9 mm) and fibre strength (27.0 g/tex) and fibre quality index (349.7); which was on par with DLSA 17, PA 812 and PA 402. The quality characters had not been influenced significantly by different times of sowing. Conclusions The results concluded that the significantly highest mean seed cotton yield was recorded with Phule Dhanwanthry (1069 kg/ha) which was on par with K12 (1027 kg/ha), DLSA 17 (977 kg/ha) and PA 812 (951 kg/ha). Planting at 4 August found that the significantly higher seed cotton yield (1345 kg/ha) in comparison with 4 September sowing (536 kg/ha). Amongst long-linted genotypes, PA 760 recorded the significantly higher fibre quality index (349.7)

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Influence of growth regulators on thermal energy requirement at various phenophases in transgenic cotton

Cited by 2 publications

References 2 publications

Thermal Unit Consumption of Cotton under Different Sowing Conditions in South Western Punjab

Thermal Unit Consumption of Cotton under Different Sowing Conditions in South Western Punjab

Assessment of production potential of long-linted Gossypium arboreum L. genotypes under different sowing times

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