Effects of Chlorination on Growth and Development of Flue-cured Tobacco and Yield and Quality of Tobacco Leaves in Chlorine-poor Red Soil

doi:10.11924/j.issn.1000-6850.casb2024-0498

Abstract

Abstract:

To investigate the effects of different chlorine application amounts on the growth and yield quality of flue-cured tobacco in chlorine-poor soil in Wenshan tobacco-growing area of Yunnan Province, five treatments (CK, conventional fertilization; T₁, added potassium chloride 30.0 kg/hm²; T₂, added potassium chloride 60.0 kg/hm²; T₃, added potassium chloride 90.0 kg/hm²; T₄, added potassium chloride 120.0 kg/hm²) were conducted. The physical and chemical properties of chlorine-poor soil, the agronomic and economic properties of tobacco plants, the appearance quality of tobacco leaves and the chemical composition of tobacco leaves under different chlorine application were analyzed to provide some theoretical basis for the improvement of chlorine-poor soil and the improvement of tobacco quality in this area. The results showed that compared with contrast (CK), chlorine application effectively increased the content of available P, available K and water-soluble chloride in chlorine-deficient soil, while it also caused a decrease in pH to varying degrees. The levels of available K and water-soluble chloride content in T₁ to T₄ increased from 36.7% to 64.1%, and 68.5% to 229.6%, respectively; the growth and development of tobacco plants in low-chlorine soil, as well as the opening of tobacco leaves, could be effectively promoted. Additionally, the growth of tobacco plants showed a slightly stronger effect of T₂ treatment than that of CK treatment; the economic characteristics of flue-cured tobacco in chlorine-poor soil were effectively enhanced. The overall economic characteristics of flue-cured tobacco decreased with the increase of chlorine application, but still outperformed CK treatment. Among the treatments, T₁ treatment exhibited the best economic properties, followed by T₂ treatment; the application of potassium chlorine-poor soil had enhanced the quality of tobacco leaves, increased the availability of chemical components, and elevated the chlorine content in tobacco leaves. The optimal comprehensive impact of applying 30-60 kg/hm² of potassium chloride on the cultivation of flue-cured tobacco in chlorine-poor soil in Wenshan was observed. However, the potential environmental impact of long-term application should be further evaluated.

Key words: tobacco flue-cured, chlorine content of tobacco leaves, chemical composition, Wenshan tobacco growing areas, chlorine-poor red soil, chlorine application rate

YIN Honghui, HU Zongling, YU Xiaofen, ZHAO Xingneng, LI Pengfei, HU Jiayun, Mao Yanting, ZHANG Lixia, QIU Xueli. Effects of Chlorination on Growth and Development of Flue-cured Tobacco and Yield and Quality of Tobacco Leaves in Chlorine-poor Red Soil[J]. Chinese Agricultural Science Bulletin, 2024, 40(35): 76-81.

Figures/Tables 6

References 38

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处理	pH	有机质/(g/kg)	碱解氮/(mg/kg)	有效磷/(mg/kg)	速效钾/(mg/kg)	水溶性氯/(mg/kg)
CK	6.5 a	27.1 a	112.2 a	32.4 a	287.2 b	7.3 C
T₁	6.3 ab	29.6 a	124.9 a	45.6 a	392.6 ab	12.3 BC
T₂	5.7 b	30.6 a	119.3 a	50.4 a	403.4 ab	16.7 B
T₃	5.7 b	26.7 a	119.6 a	38.4 a	419.1 ab	16.4 B
T₄	5.8 b	21.9 a	120.4 a	53.6 a	471.2 a	23.4 A

处理	pH	有机质/(g/kg)	碱解氮/(mg/kg)	有效磷/(mg/kg)	速效钾/(mg/kg)	水溶性氯/(mg/kg)
CK	6.5 a	27.1 a	112.2 a	32.4 a	287.2 b	7.3 C
T₁	6.3 ab	29.6 a	124.9 a	45.6 a	392.6 ab	12.3 BC
T₂	5.7 b	30.6 a	119.3 a	50.4 a	403.4 ab	16.7 B
T₃	5.7 b	26.7 a	119.6 a	38.4 a	419.1 ab	16.4 B
T₄	5.8 b	21.9 a	120.4 a	53.6 a	471.2 a	23.4 A

处理	株高/cm	叶数/片	茎围/cm	腰叶长/cm	腰叶宽/cm	腰叶叶面积/cm²
CK	113.4 b	18.9 b	12.1 a	65.3 b	25.2 b	1033.4 c
T₁	119.9 a	19.7 a	12.2 a	71.8 a	25.8 b	1231.3 a
T₂	120.7 a	20.4 a	12.6 a	79.7 a	26.6 a	1298.7 a
T₃	118.6 a	19.2 a	12.5 a	68.2 b	26.3 a	1129.8 b
T₄	117.8 a	19.7 a	12.4 a	65.9 b	25.9 b	1075.9 c

处理	株高/cm	叶数/片	茎围/cm	腰叶长/cm	腰叶宽/cm	腰叶叶面积/cm²
CK	113.4 b	18.9 b	12.1 a	65.3 b	25.2 b	1033.4 c
T₁	119.9 a	19.7 a	12.2 a	71.8 a	25.8 b	1231.3 a
T₂	120.7 a	20.4 a	12.6 a	79.7 a	26.6 a	1298.7 a
T₃	118.6 a	19.2 a	12.5 a	68.2 b	26.3 a	1129.8 b
T₄	117.8 a	19.7 a	12.4 a	65.9 b	25.9 b	1075.9 c

处理	产量/(kg/hm²)	产值/(元/hm²)	均价/(元/kg)	上等烟比例/%	中上等烟比例/%	产指	级指
CK	2152.5 c	59148.0 d	27.5 a	50.1 d	88.2 b	83.9 e	58.5 b
T₁	2652.0 a	79402.5 a	29.9 a	64.3 a	92.0 a	112.6 a	63.7 a
T₂	2571.0 a	72769.5 b	28.3 a	61.1 b	92.9 a	103.2 b	60.2 b
T₃	2458.5 b	68518.5 b	27.9 a	52.2 d	90.2 b	97.2 c	59.3 b
T₄	2407.5 b	63204.0 cd	26.3 a	54.3 c	89.9 b	89.7 d	55.9 c