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以广西三江侗族自治县40年生孟江油茶(Camellia leifera Abel)成林叶片为对象,对该油茶产区高产组和低产组油茶叶片的9种养分(N、P、K、Ca、Mg、Cu、Zn、Fe、Mn)进行DRIS诊断。结果表明:油茶林N、P、Fe相对缺乏,K、Ca、Mg、Cu、Zn、Mn相对充足,其中养分P、Fe元素在高、低组间差异显著,N、P和Fe元素缺乏是提高油茶产量的最大限制因子;树体需肥顺序为:N>P>Fe>Zn>Cu>Ca>Mn>K>M;同时,利用高产组叶片养分浓度、养分诊断指数及其等级制定了相应的养分诊断标准,可为三江侗族自治县指导油茶施肥管理提供参考。
Taking the 40-year-old Camellia leifera Abel leaves in Sanjiang Autonomous County of Guangxi as an example, the effects of 9 nutrients (N, P, K, Ca, Mg and Cu) , Zn, Fe, Mn) for DRIS diagnosis. The results showed that N, P and Fe were relatively deficient, K, Ca, Mg, Cu, Zn and Mn were relatively abundant in the Camellia oleifera forest, among which nutrient P and Fe were significantly different between high and low groups, N, P and Fe were deficient The order of increasing fertilizer requirement was as follows: N> P> Fe> Zn> Cu> Ca> Mn> K> M. At the same time, the nutrient concentration, The corresponding diagnostic criteria of nutrition can provide reference for the guidance of tea oil fertilizer management in Sanjiang Dong Autonomous County.