Effects of urea or potassium sulfate compound fertilizer on roots of Bupleurum chinense DC. and soil

doi:10.14088/j.cnki.issn0439-8114.2025.04.006

Abstract

Abstract: The aim of this study was to understand the effects of fertilizers on the yield, contents of medicinal components and rhizosphere soil of Bupleurum chinense DC. in Shiyan City, Hubei Province. Under certain conditions of basal fertilizer, the effects of urea and potassium sulfate compound fertilizer on root growth, total saponins content, water-soluble aggregates, organic matter content, nitrogen content, phosphorus content and potassium content in rhizosphere soil of two-year-old B. chinense were studied. The results showed that when the basal fertilizer was 750 kg/hm² of potassium sulfate compound fertilizer (N-P₂O₅-K₂O=14-16-15, total nutrient ≥45%) and 750 kg/hm² of the compound probiotic fertilizer(N-P₂O₅-K₂O≥5%, organic matter≥45%), applying urea or potassium sulfate compound fertilizer twice as topdressing had no significant effects on fresh root weight, main root length, total saponins content, root configuration, soil water-soluble aggregates and rhizosphere nutrients of two-year-old B. chinense DC., and the soil nitrogen and phosphorus content was low. This might be that under certain soil nutrient conditions, single topdressing urea or potassium sulfate compound fertilizer was helpful to the growth of B. chinense, but B. chinense has more demand for soil phosphorus, resulting in less phosphorus content in lateral root and rhizosphere soil, so topdressing requires mixed application of nitrogen, phosphorus and potassium fertilizers.

Key words: Bupleurum chinense DC., topdressing, urea, potassium sulfate compound fertilizer, root morphology, saponins content, rhizosphere soil

CLC Number:

TANG Bing, ZHAO Xiu-Mei, YOU Jing-Mao, ZHANG Ze-zhi, LI Kun. Effects of urea or potassium sulfate compound fertilizer on roots of Bupleurum chinense DC. and soil[J]. HUBEI AGRICULTURAL SCIENCES, 2025, 64(4): 31-34.

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