Abstract Information about Açaí palm (Euterpe oleracea Mart.) nutrition, that gives support for yield increase is sparse. The aim of this study was to assess the nutritional status of fertigated Açaí palm by the Index called Diagnosis and Recommendation Integrated System (DRIS), as well as the spatial variability of this Index and its productivity. We achieved a sampling of 80 geo-referenced points in an Açaí palm commercial crop area. Then we assessed the yield and contents of N, P, K, Ca, Mg, S, B, Cu, Fe, Mn and Zn. The DRIS evaluation indicated that the frequency of nutrients in suitable status was N > S > Zn > B>Fe > K>Ca > Mg > P>Mn > Cu, in deficiency was Mn > Ca > B>Cu > Mg > Fe > K > P > S>Zn > N, and in excess was P > Cu > Mg > K > N = Zn > Fe > Ca > S = B > Mn. The nutrients N and S were well balanced, whereas Mn, Ca and B were the nutrients with the highest frequency of deficiency. The sampling points were close enough to detect the spatial variability of DRIS Index. Thus, it was possible to observe the patterns for the nutritional deficiencies, occurring at the final part of the irrigation, as well as the variability of the Açaí palm yield. The spatial variability of the DRIS Index was efficient to indicate the points in which fittings in the fertilization doses are required.

中文翻译：

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DRIS 和地质统计指数用于营养诊断和提高灌溉巴西莓的产量

摘要 支持增产的巴西莓（Euterpe oleracea Mart.）营养信息很少。本研究的目的是通过称为诊断和推荐综合系统 (DRIS) 的指数评估施肥 Açaí 棕榈的营养状况，以及该指数的空间变异性及其生产力。我们在 Açaí 棕榈商业作物区实现了 80 个地理参考点的采样。然后我们评估了 N、P、K、Ca、Mg、S、B、Cu、Fe、Mn 和 Zn 的产量和含量。DRIS评价表明，适宜状态的养分频率为N>S>Zn>B>Fe>K>Ca>Mg>P>Mn>Cu，缺乏状态为Mn>Ca>B>Cu>Mg>Fe> K > P > S>Zn > N，并且过量的是 P > Cu > Mg > K > N = Zn > Fe > Ca > S = B > Mn。营养元素 N 和 S 平衡良好，而 Mn、Ca 和 B 是缺乏频率最高的营养元素。采样点足够接近以检测 DRIS 指数的空间变异性。因此，可以观察到灌溉最后阶段发生的营养缺乏模式，以及巴西莓棕榈产量的变化。DRIS 指数的空间变异性可以有效地指示需要在施肥剂量中进行拟合的点。发生在灌溉的最后阶段，以及巴西莓棕榈产量的可变性。DRIS 指数的空间变异性可以有效地指示需要在施肥剂量中进行拟合的点。发生在灌溉的最后阶段，以及巴西莓棕榈产量的可变性。DRIS 指数的空间变异性可以有效地指示需要对施肥剂量进行拟合的点。