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 NameAffiliation
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.