Effect of nitrogen levels and leaf position on carbohydrate and nitrogen metabolism in FCV tobacco (Nicotiana tabacum L.)

Chandrasekhararao, C.; Raju, K. Kanaka; Anuradha, M.; Ravisankar, H.; Krishna, S. Kasturi

doi:10.1007/s40502-014-0107-6

Cited by 2 publications

(4 citation statements)

References 7 publications

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“…Flue-cured tobacco is very sensitive to nitrogen (15)(16). Insufficient N supply leads to slow growth rates, leaf yellowing and premature aging, poor tobacco quality and low yield while oversupply of N results in late ripening, abnormal yellowing of tobacco leaves, and substantial reduction of tobacco quality and economic value (17)(18). Soil N is the main source of N absorbed by flue-cured tobacco, accounting for over 50% of total N uptake (19).…”

Section: Introductionmentioning

confidence: 99%

“…Among them, in the prosperous stage, the tobacco middle and upper leaves grow rapidly, which is the key period to determine the economic value and quality of flue-cured tobacco (19). Compared with lower tobacco leaves, middle and upper leaves have a higher economic value with better chemical and processing qualities (18), such as higher contents of nicotine and total nitrogen as well as a lower leaf midrib proportion. Ensuring timely and appropriate N supply in the prosperous growth stage plays a decisive role in obtaining high quality and good yields of flue-cured tobacco.…”

Section: Introductionmentioning

confidence: 99%

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Optimized Nitrogen Application Rate Significantly Increases Total Economic Value and Quality of Flue-Cured Tobacco due to the Improvement of Superior Tobacco Yield

Pu,

Dai,

et al. 2024

Contributions to Tobacco &Amp; Nicotine Research

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Summary With the improvement of irrigation and transportation infrastructures, single tobacco cultivation has been converted into tobacco–vegetable double cultivation in Yunnan Province. High residual nitrogen (N) levels in soil before tobacco transplanting induced by the excessive N input during the vegetable cultivation season resulted in a reduction of economic income and the quality of flue-cured tobacco. Therefore, the objective of this paper is to describe the optimization of N management and to provide a better understanding of the mechanism of optimal N application rate on the economic benefit and quality of tobacco. A field experiment with six N application rates (0, 45, 60, 75, 90, and 105 kg N ha−1) was carried out with a randomized block design in 2021 and 2022 in Yunnan Province. The economic value and yield, intrinsic chemical and processing quality, leaf growth rate and agronomic characters were determined. Compared with the currently recommended 105 kg N ha−1 rate, 75 kg N ha−1 significantly increased the total economic value and superior tobacco yields, improved the integrated grade of chemical compounds and resulted in leaf midrib proportions in an appropriate range. The total economic value positively correlated with the superior tobacco leaf yields (R2 = 0.91, p < 0.001), while not with medium and inferior leaf yield. The daily leaf growth rate in prosperous growth stage significantly correlated with the yield of superior tobacco and reached its maximum at a N rate of 75 kg N ha−1. The sum of N application rate and soil residual N before transplanting correlated with the total economic value (R2 = 0.66, p < 0.05) and superior leaf yield (R2 = 0.64, p < 0.05), respectively. Based on the amount of soil residual N before transplanting, the optimal N application rate was 66 kg N ha−1 which was 39 kg N ha−1 lower than the currently recommended N rate (105 kg N ha−1). Our results highlighted that the technical consultants and farmers should adjust the N application rate appropriately according to the residual N amount before transplanting and optimize the water and fertilizer management especially in the prosperous growth stage. An optimized N rate is not only of economic benefit and the improvement of quality of tobacco cultivation, but also environment friendly.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimized Nitrogen Application Rate Significantly Increases Total Economic Value and Quality of Flue-Cured Tobacco due to the Improvement of Superior Tobacco Yield

Pu,

Dai,

et al. 2024

Contributions to Tobacco &Amp; Nicotine Research

View full text Add to dashboard Cite

show abstract

“…Insufficient N supply can inhibit the growth of tobacco plants, lead to leaf yellowing and premature aging, and result in poor tobacco quality and low yield. Conversely, excessive N supply delays the ripening of tobacco plants, leads to abnormal yellowing and ripening of tobacco leaves, and significantly reduces quality and economic value (Chandrasekhararao et al., 2014; Foomany et al., 2012). Therefore, a reasonable N application rate is the key to determining the economic value and quality of flue‐cured tobacco (Cheng et al., 2021).…”

Section: Introductionmentioning

confidence: 99%

“…The tobacco growth stage is roughly divided into four periods, namely, resetting, prosperous, maturity, and harvesting stages. The prosperous stage is important for the rapid growth of the middle and upper leaves with high quality (Chandrasekhararao et al., 2014; Parker, 2009). Ensuring the growth and nutrient supply during the prosperous growth stage plays a decisive role in achieving high economic value and high‐quality flue‐cured tobacco.…”

Section: Introductionmentioning

confidence: 99%

Application of humic acid increases the economic value and yield of superior tobacco as well as improves the chemical and processing quality

Pu,

Li,

Dai

et al. 2023

Crop Science

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The overuse of nitrogen (N) fertilizer in the vegetable growing season leads to a high amount of soil residual N and a decrease of resistance to tobacco disease in the vegetable–tobacco continuous cultivation system, which will seriously threaten the sustainable development of tobacco production. Humic acid (HA) rich in bioactive substances and microelements may enhance leaf growth rate and improve the quality of tobacco. A two‐factor randomized block experiment was carried out over 2 years to evaluate the effects of additional applying HA (0 and 150 L ha−1) combined with three N rates (0, 60, and 90 kg N ha−1) on tobacco growth, economic value, chemical, and processing quality. Applying HA significantly increased the tobacco economic value by 5%–28%. The superior tobacco yields positively correlated with the economic value (R2 = 0.88), which was the key factor determining the increase of the economic value. The application of HA decreased the disease severity and increased the microelement uptake and the daily leaf growth rate in the prosperous growing stage which was positively correlated with the superior tobacco yield. Applying HA significantly improved the chemical quality and reduced the leaf midrib proportion. At the N rate of 60 kg N ha−1, HA showed the best effect of improving quality and increasing income. Our results demonstrated that the addition of HA can significantly improve the economic value and the chemical and processing quality of tobacco. The best effect can be achieved by adjusting the N rate appropriately according to the amount of soil residual N before transplanting tobacco seedlings.

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Effect of nitrogen levels and leaf position on carbohydrate and nitrogen metabolism in FCV tobacco (Nicotiana tabacum L.)

Cited by 2 publications

References 7 publications

Optimized Nitrogen Application Rate Significantly Increases Total Economic Value and Quality of Flue-Cured Tobacco due to the Improvement of Superior Tobacco Yield

Optimized Nitrogen Application Rate Significantly Increases Total Economic Value and Quality of Flue-Cured Tobacco due to the Improvement of Superior Tobacco Yield

Application of humic acid increases the economic value and yield of superior tobacco as well as improves the chemical and processing quality

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