Dry matter partitioning in Bt and non Bt cotton (Gossypium hirsutum) cultivars under different sowing environments of Punjab

Kaur, Varinderjit; Mishra, Sudhir Kumar; Singh, Kulvir

doi:10.56093/ijas.v92i12.104323

Cited by 4 publications

(5 citation statements)

References 11 publications

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“…Thus, from the above results, it can be inferred that early sown crop stays for longer time in the field to utilize optimum available temperature and solar radiation which leads to higher thermal units accumulation in line with Hebber et al (2002). Contrarily late sown crop pushes the reproductive phases to cooler environments which reduces the accumulation of heat units (Kaur et al, 2019;Sankaranarayanan et al, 2020). Among the studied cultivars, difference between Bt and non Bt cultivar was greater at early growth stages, which got narrowed with the advancement of crop growth stages.…”

Section: Accumulated Thermal Unitsmentioning

confidence: 91%

“…Both, early and delayed sowings are harmful for crop growth and productivity. Nevertheless, too early sown cotton crop attains the longer vegetative phase (Kaur et al, 2022) but, experiences shorter reproductive time which further coincids with the period of warm temperature resulting in serious yield loss (Parlawar et al, 2018). On the other hand, delayed sowing leads the reproductive phase towards the cooler temperature, lower sunshine durations, reduced photosynthetic activity, lesser carbohydrate transition to sink structures and overlapping of the vegetative and reproductive phases with each other leading to poor yield (Kaur et al, 2019;Sankaranarayanan et al, 2020).…”

mentioning

confidence: 99%

“…Nevertheless, too early sown cotton crop attains the longer vegetative phase (Kaur et al, 2022) but, experiences shorter reproductive time which further coincids with the period of warm temperature resulting in serious yield loss (Parlawar et al, 2018). On the other hand, delayed sowing leads the reproductive phase towards the cooler temperature, lower sunshine durations, reduced photosynthetic activity, lesser carbohydrate transition to sink structures and overlapping of the vegetative and reproductive phases with each other leading to poor yield (Kaur et al, 2019;Sankaranarayanan et al, 2020). However, a timely sown cotton crop is capable to develop maximum canopy structure for the sufficient light interception, and ultimately observing better crop conditions as well as productivity than too early and very late sown crop (Mishra et al, 2021).…”

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confidence: 99%

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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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Section: Accumulated Thermal Unitsmentioning

confidence: 91%

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confidence: 99%

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confidence: 99%

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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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“…Gwathmey and Clement, 2010;Kaur et al, 2022). Similarly, wider spacing of 90 x 15 cm increased the individual plant biomass.…”

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confidence: 88%

Engineering canopy architecture with enhanced yield through variety, geometry alterations and PGRs suiting mechanized cotton cultivation

Dhamodharan,

Somasundaram,

Thirukumaran

et al. 2024

Preprint

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Background With increasing labor challenges, achieving complete mechanization in cotton cultivation has become an urgent necessity in India. For mechanized cotton cultivation, it is necessary to have appropriate variety with designed canopy architecture. The required canopy architecture with higher seed cotton yield may be attained through optimizing crop geometry and spraying of plant growth regulators like mepiquat chloride. Also, application of mepiquat chloride alters canopy architecture in cotton by creating a more compact canopy suited for mechanization. In this study, we have optimized the different crop geometries and also studied the growth and yield potential of different desi varieties viz., CO 17, VPT 2 and Suraksha with respect to plant growth regulators. This study mainly deals with growth, physiology, dry matter production and yield of each compact cultivars by application of plant growth regulators grown under diverse spatial patterns.Results Among the three varieties tested, Suraksha variety significantly recorded optimum plant height, accumulated more dry matter in fruiting bodies, produced more sympodial branches and boll numbers per plant, and higher seed cotton yield compared to CO 17 and VPT 2 varieties. Increased plant densities significantly increased the dry matter production because of higher plant population per unit area. However, wider spacing of 90 cm significantly recorded greater plant height, more sympodial branches and boll numbers per plant, and seed cotton yield compared to narrow spacing of 70 cm. The combined application of mepiquat chloride with cyclanilide @ 400 ppm at square initiation and boll development stages had significantly increased the sympodial branches and number of bolls per plant, accumulated more biomass content in fruiting bodies and increased seed cotton yield, whereas application of mepiquat chloride alone accumulated more biomass content in vegetative parts and recorded greater plant height, and internodal distance.Conclusion Suraksha variety sown under spacing 90 x 15 cm and treated with mepiquat chloride with cyclanilide @ 400 ppm at square initiation and boll development stages resulted in higher number of bolls per plant, boll weight and seed cotton yield under mechanized cultivation. This combination also produced a desired plant architecture suitable for mechanical harvesting.

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“…Ali et al [9] showed that 15 th April to 10 th May sown cotton gave maximum crop growth rate. Kaur et al [14] studied on three sowing dates (20 th April, 10 th May, and 30 th May) revealed that the crop growth rate (CGR) was greater for the cotton sown earlier 20 th April. The range from 90-120 DAS (days after sowing) produced the maximum RGR.…”

Section: Introductionmentioning

confidence: 99%

Influence of micro-environment on the growth characteristics of cotton (Gossypium hirsutum L.) with reference to row positions

Muhammad,

Marof

2024

PJBAS

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This experiment was conducted at Grdarasha Experimental Field, University of Salaheddin, Erbil (36.11 o N, 44.01 o E), to study the growth performance of cotton cultivar Coker 310 under four micro environmental conditions. The levels were composed of row directions and sowing dates as main plot (E1-E4) in split plot of Randomized Complete Block Design (RCBD). A total of 13 row positions (RP1-RP13) of different central and outer positions were included in sub plots, those rows had dual roles, as a principle constitute of the sub-plot and as a bilateral use to check the reality of the sampling statistic concept that suggests not to depend on the samples from terminal parts. with three replicates, during two successive growing seasons in 2021 and2022. Results showed that the highest value was recorded from (E1and E2) for both seasons. The highest values were recorded of weight dry matter from (E3 and E4), leaf area from (E3), leaf area index from (E3 and E4), crop growth rate and relative growth rate from (E4 and E1) at 60 DAS f or both seasons. at 90 DAS the highest values of weight dry matter, leaf area, crop growth rate was recorded form (E4) and leaf area index from (E3) in the first season, while the second season at 90DAS the highest values of weight dry matter, leaf area, leaf area index, crop growth rate was recorded from (E3) and relative growth rate was recorded from (E4). The row positions (RP8 and RP5) superiority in plant height for both yeas. (RP1 and RP9) recorded superiority in weight dry matter, (RP1 and RP8) recorded superiority in leaf area, (RP2 and RP8) recorded superiority in leaf area index and (RP10 and RP3) in relative growth rate at 60DAS for both years. The highest values at 90DAS of weight dry matter, leaf area and leaf area index were recorded from (RP9 and RP10) for both years. The highest values of crop growth rate were recorded from (RP9 and RP11) at 60 and 90 DAS for both years. The highest value of relative growth rate at 90DAS was recorded from (RP12)

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Dry matter partitioning in Bt and non Bt cotton (Gossypium hirsutum) cultivars under different sowing environments of Punjab

Cited by 4 publications

References 11 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

Engineering canopy architecture with enhanced yield through variety, geometry alterations and PGRs suiting mechanized cotton cultivation

Influence of micro-environment on the growth characteristics of cotton (Gossypium hirsutum L.) with reference to row positions

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