Effects of Rhizosphere Soil Chemicals on Growth and Quality of Tea Trees at Different Ages

doi:10.3969/j.issn.1000-2561.2019.11.008

Abstract

Abstract:

In order to analyze the effect of tea tree rhizosphere soil chemicals on the growth and quality of tea tree, the rhizosphere soils from Tieguanyin tea plantations of 0, 3, 9 and 25 years old were extracted and eluted through different polar resins to discuss the effects of rhizosphere soil with different planting ages on the growth and quality of tea trees. The inhibitory effects by resin eluents on the receptor dry weight were in the order, 25>9>3>0 years, furthermore, the ADS-7 resin adsorption eluent had the strongest inhibitory effect. After exogenous addition the different resin eluent, the contents of IAA and ZR in the tea leaves significantly decreased with the increase of tea tree age, when treated by the same resin eluent, while the ABA content showed a significant increase. In addition, when the tea trees were in the same age, and the effect of different resins were still the ADS-7 most, as showed that the contents of IAA and ZR in the tea leaves were the lowest and the ABA was the highest. Analysis of the contents of amino acids in the tea leaves showed that the contents of total amino acids, hydrophilic amino acids, sweet amino acids and umami amino acids in the tea leaves were showed a downward trend with the increase of tea tree age after treated by different resin eluent. In summary, the rhizosphere soil chemicals of tea tree had an autotoxicity effect on tea tree and the ADS-7 resin eluents from 25-year-old tea tree rhizosphere soil were the stronges.

Key words: rhizosphere soil of tea tree, autotoxicity, endogenous hormones, amino acids

WANG Haibin,CHEN Xiaoting,WANG Yuhua,ZHAO Hu,ZHANG Huabin,DING Li,KONG Xianghai,YE Jianghua. Effects of Rhizosphere Soil Chemicals on Growth and Quality of Tea Trees at Different Ages[J]. Chinese Journal of Tropical Crops, 2019, 40(11): 2149-2159.

Figures/Tables 10

Fig. 1 Bioassay of eluents from resins of different polarities Different lowercase letters indicate significant difference among the different cropping years (P<0.05).

Fig. 2 The contents of IAA in tea leaves after treated by different polarity resin eluent Different lowercase letters significa indicate significant differences among the different cropping years (P<0.05).

Fig. 3 The contents of ZR in tea leaves after treated by different polarity resin eluent Different lowercase letters indicate significant differences among the different cropping years (P<0.05).

Fig. 4 The contents of ABA in tea leaves after treated by different polarity resin eluent Different lowercase letters indicate significant differences among the different cropping years (P<0.05).

Tab. 1 The contents of amino acid in tea leaves after treated by different polarity resin eluent mg·g-1

Fig. 5 The contents of hydrophobic amino acid in tea leaves after treated by different polarity resin eluent Different lowercase letters indicate significant differences among the different cropping years (P<0.05).

Fig. 6 The contents of hydrophilic amino acid in tea leaves after treated by different polarity resin eluent Different lowercase letters indicate significant differences among the different cropping years (P<0.05).

Fig. 7 The contents of sweet amino acid in tea leaves after treated by different polarity resin eluent Different lowercase letters indicate significant differences among the different cropping years (P<0.05).

Fig. 8 The contents of umami amino acid in tea leaves after treated by different polarity resin eluent Different lowercase letters indicate significant differences among the different cropping years (P<0.05).

Fig. 9 The contents of bitter amino acid in tea leaves after treated by different polarity resin eluent Different lowercase letters indicate significant differences among the different cropping years (P<0.05).

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