Tuber greening is one of the major causes of quality loss in the potato industry, however, the impact of nitrogen in-field fertilization on this visual defect remains unknown. Two field experiments, one in Tasmania with final N treatment rates of 40, 100 and 190 kg N ha⁻¹ for Nicola and 35, 95 and 185 Kg N ha⁻¹ for Maranca, and another in South Australia with N rates of 100, 200 and 300 kg ha⁻¹ for Maranca, showed a positive linear relationship (R² = 0.99, 0.86 and 0.90, respectively) between tuber N content and tuber greening, as determined by chlorophyll content. However, increased N fertilization rates did not directly translate to increased tuber N content, with responses appearing to vary with variety and location. We conclude that tuber N content is a risk factor associated with tuber greening, but the manipulation of tuber N content through N fertilization rate is not straightforward and may depend on variety and location.

中文翻译：

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马铃薯块茎绿化风险与块茎含氮量有关

块茎绿化是马铃薯行业质量下降的主要原因之一，但是，氮肥田间施肥对这种视觉缺陷的影响仍然未知。两次野外试验，一次在塔斯马尼亚，尼古拉对N的最终氮处理率为40、100和190 kg N ha ^-1，对马兰卡，最终N的处理率为35、95和185 Kg N ha ^-1，在南澳大利亚，另一次对N的处理率为100，马兰卡200和300 kg ha ^-1，呈正线性关系（R ² 由叶绿素含量确定的块茎N含量和块茎绿化之间分别为0.99、0.86和0.90）。然而，增加的氮肥施用率并不能直接转化为增加的块茎氮含量，其响应似乎随品种和位置而变化。我们得出的结论是，块茎N含量是与块茎绿化相关的危险因素，但通过施肥N来控制块茎N含量并非易事，可能取决于品种和位置。