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
To explore the suitable flue-cured tobacco and sweet potato intercropping model for high quality de-velopment of flue-cured tobacco in dryland of western Henan,we conducted a field experiment using flue-cured to-bacco'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 in-cidence of soil-borne rhizome diseases was reduced by 74.38％～78.42％.When the plant spacing of flue-cured to-bacco 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 val-ue 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 west-ern Henan had significant advantage with land equivalent ratios(LER＞1).Moreover,these indexes of flue-cured to-bacco growth,yield and qualityas well as comprehensive benefit were the best when the plant spacing was 60 cm un-der flue-cured tobacco intercropping compared to the plant spacing was 65 cm under flue-cured tobacco monoculture.
flue-cured tobaccotobacco and sweet potato intercroppingplant spacingtobacco yieldtobacco qualitydryland of western Henan
国家科技期刊平台
NSTL
万方数据
维普
