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Journal of Agriculture ›› 2021, Vol. 11 ›› Issue (10): 69-74.doi: 10.11923/j.issn.2095-4050.cjas2020-0122

Special Issue: 烟草种植与生产

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Effects of Biological Carbon and Water Regulation on Photosynthetic Characteristics of Flue-cured Tobacco

Fu Changwu1(), Wang Zufu1(), Song Jiaqing2, Hou Xiangwen1, Qin Xiao1, Dai Xi1, Yuan Mouzhi1, Yao Wang1   

  1. 1Sangzhi Branch Company of Zhangjiajie Tobacco Company, Zhangjiajie 427100, Hunan, China
    2Zhangjiajie Tobacco Company, Zhangjiajie 427000, Hunan, China
  • Received:2020-07-07 Revised:2020-11-06 Online:2021-10-20 Published:2021-10-28
  • Contact: Wang Zufu E-mail:fcw8303@163.com;490625083@qq.com

Abstract:

To explore the effects of different water regulation measures on photosynthetic characteristics of flue-cured tobacco after the application of biochar, field experiments were conducted to study the changes of photosynthetic characteristics of flue-cured tobacco at different growth stages and their correlation, relative chlorophyll content (SPAD) and economic traits. The results showed that after the application of biochar, different water regulation treatments increased the net photosynthetic rate (Pn) of flue-cured tobacco at different growth stages, with the strongest in the vigorous growing stage, followed by the spherical plant stage, and the mature period was relatively weak. Pn was significantly related to physiological and ecological factors. After applying biochar, the Pn of water regulation treatment was mainly affected by stomatal conductance, and the Pn of non-biochar and non-irrigated water treatment (CK) was mainly affected by transpiration. The SPAD value, yield and output value of flue-cured tobacco showed significant differences, and those of the irrigation water of 300 mL/plant every 5 days after the application of biochar were the highest and of CK were the lowest, reaching a significant difference (P<0.05). Therefore, the photosynthetic capacity of tobacco leaves could be promoted by water regulation after biochar application, and the photosynthetic capacity of tobacco leaves is the strongest under irrigation of 300 mL/plant every 5 days after biochar application.

Key words: Biochar, Water Regulation, Flue-cured Tobacco, Photosynthetic Characteristics, Path Analysis

CLC Number: