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[1]YE Zhicheng,ZHU Qing,LIAO Kaihua,et al.Effects of Different Fertilization Levels and Methods on Tea Quality and Leaching Concentrations of Nitrogen and Phosphorus in Soil in Tianmu Lake Basin[J].Research of Soil and Water Conservation,2023,30(04):53-60,68.[doi:10.13869/j.cnki.rswc.2023.04.001.]

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Effects of Different Fertilization Levels and Methods on Tea Quality and Leaching Concentrations of Nitrogen and Phosphorus in Soil in Tianmu Lake Basin

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 30 Number of periods: 2023 04 Page number: 53-60,68 Column: Public date: 2023-06-10

Title:: Effects of Different Fertilization Levels and Methods on Tea Quality and Leaching Concentrations of Nitrogen and Phosphorus in Soil in Tianmu Lake Basin

Author(s):: YE Zhicheng^1,2, ZHU Qing¹, LIAO Kaihua¹, LI Hengpeng¹, LAI Xiaoming¹, LI Baojie³, LIU Ya^1,2; (1.Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, CAS, Nanjing 210008, China; 2.University of Chinese Academy of Sciences, Beijing 100049, China; 3.School of Environmental Science & Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China)

Keywords:: Tianmu Lake Basin; tea plantations; non-point source pollution; slow-release fertilizer; nitrogen and phosphorus leaching

CLC:: S153.6

DOI:: 10.13869/j.cnki.rswc.2023.04.001.

Abstract:: [Objective] According to the need for water environmental protection in the Tianmu Lake Basin, the effect mechanism of fertilization on tea quality and soil nitrogen(N)and phosphorus(P)leaching was revealed, and the optimal fertilization model of tea plantations in the basin was selected, so as to provide theoretical support for the control of non-point source pollution in Tianmu Lake Basin. [Methods] Basing on long-term located experiments, two fertilization methods such as conventional fertilization(CF)and optimizing fertilization(OF)were considered in this research, and four different N and P application levels. including CF/OF₁(214.73 and 74.26 kg/hm²), CF/OF₂(245.40 and 84.86 kg/hm²), CF/OF₃(306.75 and 106.08 kg/hm²)and CF/OF₄(368.10 and 127.30 kg/hm²)were designed to discuss the effects on N and P leaching concentration and tea quality in Tianmu Lake tea plantation. [Results] Under the same fertilization level, compared with CF treatment, the OF treatment had lower leaching concentration of dissolved total nitrogen, nitrate nitrogen, dissolved total phosphorus and orthophosphate in soil of tea plantation which decreased by 40.22%～82.31%, 44.86%～62.39%, 26.67%～96.36% and 20.00%～97.29%, respectively. Different fertilization levels and methods had little effect on the tea water extract content(ranging from 47.4% to 48.7%), but had a great effect on phenol/ammonia ratio of tea. Phenol/ammonia ratio in 2022 spring tea under CF₄ treatment was the lowest(2.52), followed by CF₁ treatment(2.71)and OF₁ treatment(2.76). [Conclusion] Considering tea quality and soil N and P leaching concentration, OF₁ model can both ensure a high quality of the tea and effectively reduce the N and P leaching in soil in the research area.

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Last Update: 2023-06-10