Abstract:
To reveal the nutritional status of a mature
Camellia oleifera stand located in the hilly region of Sichuan Basin by diagnosing the macro, medium and trace elements in the leaves and summarize the suitable fertilizing range of each nutrient, and provide theoretical guidance for the scientific fertilization of
Camellia oleifera stands in this region. The leaves of
Camellia oleifera sampled from a mature stand in the hilly area of South Sichuan Basin were used for the determination of contents of nine nutrients (N, P, K, Ca, Mg, Cu, Zn, Fe and Mn), and the nutrient requirement order of this
Camellia oleifera stand was obtained by the establishment of the DRIS nutrition diagnosis system for
Camellia oleifera leaves, Also, the DRIS nutritional diagnosis system for
Camellia oleifera leaves was built. The results showed that the nutrient requirement order of this
Camellia oleifera stand was Ca>Zn>Mn>P>Mg>Cu>N>Fe>K; the suitable content ranges of various nutrients were obtained, that is, N 10.978-15.456 g·kg
−1, P 0.469-1.271 g·kg
−1, K 0.959-8.844 g·kg
−1, Fe 0.076-0.257 g·kg
−1, Zn 8.390-24.477 mg·kg
−1, Cu 2.790-5.980 mg·kg
−1, Mn 1.151-90.485 mg·kg
−1, Ca 2.056-10.054 g·kg
−1, Mg 0.796-1.677 g·kg
−1. Conclusion: In the hilly area of South Sichuan Basin, these nutrients, i.e. K, Fe, N and Cu are relatively abundant, while the remaining five nutrients, i.e. Ca, Zn, Mn, P and Mg in
Camellia oleifera leaves are relatively deficient, which should be taken more consideration when fertilizing.