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以低产果园和高产果园的库尔勒香梨叶片为试材,应用诊断施肥综合法(DRIS),测定和统计分析了叶片营养元素含量,以期建立库尔勒香梨营养诊断指标,为指导科学施肥提供参考。结果表明:筛选出N/Mg、N/Mn、N/Cu、P/Mg、P/Fe、P/Mn、P/Cu、K/Mn、K/Cu、Ca/Mg、Ca/Mn、Ca/Cu、Mg/Fe、Mg/Cu、Mg/Zn、Fe/Mn、Fe/Cu、Fe/Zn、Mn/Zn和Cu/Zn作为库尔勒香梨营养元素诊断的DRIS参项,并初步提出DRIS标准;通过DRIS指数计算,20a树龄库尔勒香梨低产果园的养分平衡总体水平较低,需肥顺序为P>N>Ca>K>Zn>Fe>Mg>Mn>Cu。
Using lowland orchards and high yield orchards Korla fragrant pear leaves as test material, applying the method of diagnostic fertilization (DRIS), the content of nutrient elements in leaves was measured and analyzed, with a view to establishing nutritional indicators of Korla fragrant pear and providing reference for scientific fertilization. The results showed that N / Mg, N / Mn, N / Cu, P / Mg, P / Fe, P / Mn, P / Cu, K / Mn, K / Cu, Ca / Mg, Ca / Mn, Ca / Cu, Mg / Fe, Mg / Cu, Mg / Zn, Fe / Mn, Fe / Cu, Fe / Zn, Mn / Zn and Cu / Zn were used as DRIS parameters in diagnosing nutrition elements of Korla fragrant pear and DRIS According to the DRIS index, the overall nutritional balance of 20-year-old Korla fragrant pear low-yield orchards is low, and the order of fertilizer need is P> N> Ca> K> Zn> Fe> Mg> Mn> Cu.