| Effects of plant spacing on growth, yield and quality of flue\|cured tobacco under tobacco and sweet potato intercropping pattern in dryland of western Henan |
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| DOI：10.7606/j.issn.1000-7601.2024.01.20 |
| Key Words: flue\|cured tobacco tobacco and sweet potato intercropping plant spacing tobacco yield tobacco quality dryland of western Henan |
| Author Name | Affiliation | | WANG Yuehua | College of Agriculture, Henan University of Science and Technology, Luoyang, Henan 471023, China | | MA Ke | Henan Agricultural Radio and Television School, Zhengzhou, Henan 450008, China | | SU Shaowei | Henan Provincial Tobacco Company of CNTC, Zhengzhou, Henan 450018, China | | ZHOU Junxue | Technology Center, Luoyang Branch of Henan Provincial Tobacco Corporation, Luoyang, Henan 471023, China | | SHEN Hongtao | Technology Center, China Tobacco Henan Industrial Limited Company, Zhengzhou, Henan 450016, China | | WEN Xuanlin | College of Agriculture, Henan University of Science and Technology, Luoyang, Henan 471023, China | | ZHANG Shuhao | College of Agriculture, Henan University of Science and Technology, Luoyang, Henan 471023, China | | LI Youjun | College of Agriculture, Henan University of Science and Technology, Luoyang, Henan 471023, China | | WANG Yanfang | College of Agriculture, Henan University of Science and Technology, Luoyang, Henan 471023, China | | LIU Ling | College of Agriculture, Henan University of Science and Technology, Luoyang, Henan 471023, China |
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| Abstract: |
| To explore the suitable flue\|cured tobacco and sweet potato intercropping model for high quality development of flue\|cured tobacco in dryland of western Henan, we conducted a field experiment using flue\|cured tobacco ‘LY1306’ and fresh sweet potato ‘Pushu 32’ as experimental materials to investigate the effects of flue\|cured tobacco and sweet potato with 2∶2 intercropping pattern and different plant spacing (65 cm, 60 cm and 55 cm) of flue\|cured tobacco on the growth, yield and quality of flue\|cured tobacco. The results showed that 90 days after flue\|cured tobacco transplanting, compared with flue\|cured tobacco monoculture, when the flue\|cured tobacco plant spacing was 65 cm, the maximum leaf length and maximum leaf width of flue\|cured tobacco intercropping with sweet potato were increased by 5.09%~5.12% and 5.17%~8.17%, the SPAD value was increased by 4.90%~6.81%; Pn, Gs and Tr were increased by 16.39%~21.50%, 23.82%~27.72% and 36.21%~45.31%; and the incidence of soil\|borne rhizome diseases was reduced by 74.38%~78.42%. When the plant spacing of flue\|cured tobacco was 60 cm, the maximum leaf length and maximum leaf width of flue\|cured tobacco intercropping with sweet potato were increased by 3.71%~4.79% and 4.69%~7.61%; the SPAD value increased by 3.80%~5.55%, Pn, Gs and Tr increased by 14.03%~19.77%, 15.68%~22.49% and 29.83%~35.78%; and the incidence of soil\|borne rhizome diseases decreased by 75.30%~78.11%. The internal chemical composition of flue\|cured tobacco leaves under the two\|plant spacing of intercropping was more coordinated than that of flue\|cured tobacco monoculture. Under intercropping, with plant spacing of flue\|cured tobacco increasing, the land equivalent ratio (LER), total output value and sensory evaluation total score of flue\|cured tobacco increased first and then decreased. When plant spacing of flue\|cured tobacco was 60 cm under flue\|cured tobacco and sweet potato intercropping, the total output value of was 82 855.40 CNY·hm-2 in 2021 and 81 654.55 CNY·hm-2 in 2022, which was 15.85% and 22.43% higher than that of flue\|cured tobacco monoculture. In summary, intercropping flue\|cured tobacco and sweet potato in dry land of western Henan had significant advantage with land equivalent ratios (LER>1). Moreover, these indexes of flue\|cured tobacco growth, yield and qualityas well as comprehensive benefit were the best when the plant spacing was 60 cm under flue\|cured tobacco intercropping compared to the plant spacing was 65 cm under flue\|cured tobacco monoculture. |
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