| Effect of nitrogen application on flue-cured tobacco (Nicotiana tabacum L.) quality and economic benefits in central of Henan Province |
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| DOI：10.7606/j.issn.1000-7601.2017.06.30 |
| Key Words: nitrogen flue-cured tobacco（Nicotiana tabacum L.） chemical components aroma components economic benefits |
| Author Name | Affiliation | | XING Yun-xia | College of Resources and Environment, Henan Agricultural University, Zhengzhou 450002, China
Sanmenxia City Tobacco Corporation of Henan Province, Sanmenxia, Henan 472000, China | | LIU Shi-liang | College of Resources and Environment, Henan Agricultural University, Zhengzhou 450002, China | | ZHU Jin-feng | Luohe City Tobacco Corporation of Henan Province, Luohe, Henan 462000, China | | LIU Fang | College of Resources and Environment, Henan Agricultural University, Zhengzhou 450002, China | | JIANG Gui-ying | College of Resources and Environment, Henan Agricultural University, Zhengzhou 450002, China | | DU Jun | Henan Academy of Agricultural Sciences, Zhengzhou 450002, China | | HUA Dang-ling | College of Resources and Environment, Henan Agricultural University, Zhengzhou 450002, China | | WANG Dai-chang | College of Resources and Environment, Henan Agricultural University, Zhengzhou 450002, China |
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| Abstract: |
| The unreasonable use of nitrogen (N) fertilizer is the key factor for flue-cured tobacco quality in Central of Henan Province. A field experiment with five levels of N application rates (0, 22.5, 37.5, 52.5, 67.5 kg·hm-2) was carried out to study the effect of nitrogen application rates on flue-cured tobacco agronomic characters, chemical components and economic benefits in the central part of Henan Province. The results showed that under the treatment with N application rate of 52.5 kg·hm-2 (N3), the flue-cured tobacco growth vigor was best, and the height, leaf number, the maximum leaf was significant higher than that of other treatments. K content of upper leaves (B2F) and middle leaves (C3F) was significant higher than that of other treatments, the Cl content of upper leaves was significant lower than that of other treatments, so K/Cl ratio was relatively higher, and the chemical composition was more coordinated. Meanwhile, the aroma components content of N3 was as high as 860.08 μg·g-1. The flue-cured tobacco average price, superior and secondary class ratio, yield and output value of N3 treatment was higher than that in others treatment. The N fertilizer use efficiency in N3 treatment was the highest. Moreover, under the N application range from 0 to 52.5 kg·hm-2, there was a significant positive correlation between N application rates among the average price, the proportion of superior tobacco leaves, yield, and output value. While beyond 52.5 kg·hm-2, all these indexes declined. A suggestion of N rate of 52.5 kg·hm-2 for quality flue-cured tobacco leaves was proposed in Central of Henan Province. |
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