Effects of Nitrogen Rates on Soil Nutrients and Tea Quality Components in Tea and Soybean Intercropping System

doi:10.7668/hbnxb.20191783

Abstract

Abstract: In order to explore the effects of tea and soybean intercropping on tea quality and soil nutrients under different nitrogen rates. A pot experiment with four nitrogen rates(N0:0 g/kg, N1:0.25 g/kg, N2:0.50 g/kg and N3:1.00 g/kg)and two cropping patterns of tea and soybean intercropping and tea monocropping was conducted. The results showed that compared with monocropped tea, tea and soybean intercropping significantly improved the contents of free amino acids, caffeine and soluble sugar of tea, while decreased the content of tea polyphenols to advance the nutritional quality of tea. It also significantly increased the contents of total N, available N, available P, available K and organic matter, thus improving the fertility. In addition, the yield and quality of tea were not significantly reduced by 1/2 of nitrogen application rates(N1)in comparison to the monocropped tea with normal nitrogen application rates(N2)in the tea and soybean intercropping system, and also enhanced soil fertility. Correlation analysis indicated that the improvement of tea quality was closely related to the abundance and deficiency of soil nutrients. Under this experimental condition, tea and soybean intercropping system had the potential to maintain tea yield, quality and soil nutrients improvement under the treatment of reducing nitrogen application.

Key words: Tea, Intercropping, Nitrogen rates, Soil nutrients, Quality components

CLC Number:

LI Jinting, WEI Jinjian, WEI Chizhang, NONG Yuqin, LUO Yanfei, LU Jinmei, LIAO Chunwen, QIN Xiaomin. Effects of Nitrogen Rates on Soil Nutrients and Tea Quality Components in Tea and Soybean Intercropping System[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2021, 36(S1): 282-288. doi: 10.7668/hbnxb.20191783.

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