Investigation on Soil Fertility Status and Improvement Strategies of Mountainous Tea Plantations in Anxi County

To clarify the soil fertility status of mountainous tea plantations in Anxi County and propose improvement strategies, this study collected soil samples from the 0-20 cm cultivated layer of 152 mountainous tea plantations in 12 townships of Anxi County, following the national technical specifications for soil testing and formulated fertilization sampling. The soil fertility indicators were tested and evaluated. The soil pH in some mountainous tea plantations of Anxi County was 4.65 ± 0.33, indicating significant acidification; the organic matter content was 1.32 ± 0.21%, which was generally low and unevenly distributed; the total nitrogen, total phosphorus, and total potassium contents were 1.45 ± 0.46 g·kg⁻¹, 0.73 ± 0.27 g·kg⁻¹, and 17.96 ± 4.87 g·kg⁻¹, respectively, showing relatively abundant levels; the exchangeable calcium and magnesium contents were 201.57 ± 45.69 mg·kg⁻¹ and 19.36 ± 4.49 mg·kg⁻¹, respectively, both at relatively low levels; the available boron content was 0.22±0.06 mg·kg-1, indicating a severe deficiency. And in response to soil acidification, insufficient organic matter content, and insufficient trace element content in mountainous tea gardens in Anxi County, improvement measures such as promoting soil testing formulate fertilization, increasing organic fertilizer application, and supplementing trace elements were proposed to enhance soil fertility and promote the sustainable development of Anxi tea industry.