Crops ›› 2021, Vol. 37 ›› Issue (3): 190-194.doi: 10.16035/j.issn.1001-7283.2021.03.029

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Effects of Different Calcium Concentrations on Growth and Magnesium Absorption of Flue-Cured Tobacco

Feng Xinwei1,2(), Huang Ying1,2(), Wu Guili3, Gou Jianyu4, Peng Yulong4   

  1. 1College of Tobacco, Guizhou University, Guiyang 550025, Guizhou, China
    2Guizhou Key Laboratory of Tobacco Quality Research, Guiyang 550025, Guizhou, China
    3Pu'an Tea Development Center, Pu'an 561500, Guizhou,China
    4Zunyi Branch of Guizhou Provincial Tobacco Company, Zunyi 563000, Guizhou, China
  • Received:2020-07-01 Revised:2020-10-26 Online:2021-06-15 Published:2021-06-22
  • Contact: Huang Ying E-mail:1755406711@qq.com;316452492@qq.com

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Abstract:

To study the effects of calcium concentration on growth and magnesium (Mg) absorption of flue-cured tobacco, samples from the growth period of flue-cured tobacco K326 leaves with different concentrations of Ca2+ in nutrient culture were collected. The agronomic traits, amount of biomass accumulation, calcium(Ca) and Mg content in resettling stage and squaring stage, Ca and Mg ratio, the correlation between Ca2+ concentration and the contents of Ca and Mg, and agronomic traits were analyzed. The results showed that the contents of upper and lower leaf Mg was negatively significant correlated with the concentration of Ca2+ in the culture solution. The content of Mg in middle leaves was negatively significant correlated with the content of Ca in tobacco leaves. The growth potential of flue-cured tobacco was the best when the concentration of Ca2+ was 12.25mmol/L and 11.22mmol/L was the best concentration for the accumulation of leaf biomass of flue-cured tobacco. So, the optimal concentration of rhizosphere Ca2+ for flue-cured tobacco growth was 11.22-12.25mmol/L.

Key words: Culture solution, Calcium concentration, Flue-cured tobacco growth, Magnesium absorption

Fig.1

Effects of culture solution Ca2+ concentration on agronomic traits of flue-cured tobacco"

Fig.2

Effects of culture solution Ca2+ concentration on biomass of flue-cured tobacco"

Fig.3

Effects of culture solution Ca2+ concentration on Mg absorption of flue-cured tobacco during the resettling stage and squaring stage Different letters indicate the significant difference between different treatments in the same part (P < 0.05)"

Table 1

Correlation analysis of culture solution Ca2+ concentration and agronomic traits of flue-cured tobacco"

时期Stage 株高Plant height 茎围Stem girth 最大叶面积Maximum leaf area
Ca2+ 浓度 团棵期 0.79* 0.47 0.42
Ca2+ concentration 旺长中期 0.64 0.37 -0.08
现蕾期 0.37 0.52 0.35

Table 2

Correlation analysis of Ca2+ concentration in culture solution and Ca content in tobacco leaves"

项目Item 团棵期Resettling stage 现蕾期Squaring stage
上部叶Upper leaf 中部叶Mid leaf 下部叶Lower leaf 上部叶Upper leaf 中部叶Mid leaf 下部叶Lower leaf
Ca2+ 浓度
Ca2+ concentration		 0.04 0.48 0.24 0.70 0.34 0.73*

Table 3

Correlation analysis of the concentration of Ca2+ in culture solution and the content of Mg in tobacco leaves"

项目Item 团棵期Resettling stage 现蕾期Squaring stage
上部叶Upper leaf 中部叶Mid leaf 下部叶Lower leaf 上部叶Upper leaf 中部叶Mid leaf 下部叶Lower leaf
Ca2+ 浓度
Ca2+ concentration		 -0.83* -0.31 -0.84** -0.73* -0.22 -0.79*

Table 4

Correlation analysis of Ca and Mg contents in tobacco leaves"

项目Item 时期Stage 部位Part 镁含量Mg content
上部叶Upper leaf 中部叶Mid leaf 下部叶Lower leaf
钙含量Ca content 团棵期 上部叶 -0.48 -0.71* -0.52
中部叶 -0.74* -0.74* -0.60
下部叶 -0.55 -0.85** 0.32
现蕾期 上部叶 -0.60 -0.44 -0.07
中部叶 -0.50 -0.33 -0.41
下部叶 -0.69 -0.14 -0.31
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