Flue-cured tobacco (Nicotiana tabacum L.) leaf quality can be improved by grafting with potassium-efficient rootstock
文献类型: 外文期刊
作者: Hu, Wei 1 ; Wei, Jingyi 2 ; Di, Qing 2 ; Tao, Tao 2 ; Zhang, Jie 3 ; Liu, Jia 4 ; Shi, Xiaojun 1 ;
作者机构: 1.Southwest Univ, Coll Resources & Environm, Chongqing 400716, Peoples R China
2.Chongqing Acad Agr Sci, Vegetable & Flower Inst, Chongqing 401329, Peoples R China
3.Nanchang Inst Technol, Nanchang 330099, Jiangxi, Peoples R China
4.Jiangxi Acad Agr Sci, Soil & Fertilizer & Resources & Environm Inst, Nanchang 330200, Jiangxi, Peoples R China
关键词: Potassium; Grafting; Smoking quality; Tobacco (Nicotiana tabacum L; )
期刊名称:FIELD CROPS RESEARCH ( 影响因子:5.224; 五年影响因子:6.19 )
ISSN: 0378-4290
年卷期: 2021 年 274 卷
页码:
收录情况: SCI
摘要: The low Potassium (K) content in flue-cured tobacco leaves severely restricts the development of China's highquality cigarette industry. To determine whether the quality of flue-cured tobacco leaves can be improved by grafting, a cross-grafting experiment of two different K-efficiency tobacco strain (Yunyan 87, main cultivar. WuFeng No.2, K-efficient genotype) was carried out. Measurement data from a field experiment with three K supply levels (0,135 and 270 kg K2O ha-1) and four grafting combinations ['Wufeng No. 2'(W), 'Yunyan 87'(Y), Y/W (Y grafted onto W) and W/Y (W grafted onto Y)] from 2018 to 2019 were used to evaluate the effect of grafting on flue-cured tobacco quality. The results demonstrated that the average leaf maturity in the grafted tobacco 'Yunyan 87' increased by 7.69 %. Meanwhile, maximum accumulation, rapid accumulation duration, and maximum relative accumulation rates of K and biomass in the grafting treatments were all improved over the growth period, and the K levels in the grafted tobacco leaves increased by 95.4 % on average. In addition, when potassium supply level was insufficient, the proportion of K+ in grafted tobacco leaves was higher than that in other treatments. In terms of commercial quality, the chemical and smoking quality of grafted tobacco leaves were 32.2 % and 7.1 % higher than those of ungrafted tobacco leaves. The grafted 'Yunyan 87' inherited the advantages of the scion in terms of flavor. At the same time, the combustibility of Y/W was improved by the characteristics of the rootstock, and its total score of quality was highest. The correlation analysis revealed that K accumulation was significantly related to the improvement of tobacco leaf quality. Therefore, increasing the K content and improving the quality of tobacco leaves through grafting is a feasible approach for the production of high quality flue-cured tobacco.
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