Effect of different antitranspirants on drought-resistance and water-retention of flue-cured tobacco

Xiuneng Li, Xiaohou Shao, Rongqi Li, Fuzhang Ding, Youbo Yuan, Chao Gao and Xu Yang

In recent years, water resources have been scarce in major tobacco-growing areas of China, and their distribution in space and time has been uneven. Since the drought could be significant in affecting the normal growth of flue-cured tobacco, measures that are beneficial for improving the growth of crops needs more concerns. In this study, the application of different antitranspirants was used as a factor affecting the water retention effects of flue-cured tobacco.The results showed thatwith the increase of transplanting time, the plant height, leaf number, and stem circumference ofeach treatments increased to varying degrees, while the chlorophyll and maximum leaf area increased first and then decreased. Compared with CK, the increase in plant height, leaf number, stem circumference, and maximum leaf area treated with antitranspirant was significantly larger than CK. The spraying of antitranspirant helped to increase the plant height, leaf number, stem circumference, chlorophyll and maximum leaf area of flue-cured tobacco.The spraying of antitranspirant increased the moisture content in roots, stems and upper leaves of flue-cured tobacco, and had little effect on the dry matter accumulation, but it could increase the yield. The spraying of antitranspirant had different effects on the net photosynthetic rate and intercellular CO2 concentration, with different laws, but it could significantly reduce stomatal conductance and transpiration rate.

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