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Evaluating Multiple Diagnostic Tools for Monitoring In-season Nitrogen Status of Chipping Potatoes in the Upper Midwest of the USA
Potato Research ( IF 2.9 ) Pub Date : 2021-06-16 , DOI: 10.1007/s11540-021-09507-y
Yi Wang , Mack Naber , Trevor Crosby , Guolong Liang

Potato production requires intensive nitrogen (N) fertilization. To maintain yield and profitability, potato farmers must satisfy the need of the crops for N by applying fertilizer during the growing season. Petiole nitrate analysis and whole leaf total N test have been studied before to guide in-season N application, and both have strengths and weaknesses. Whole vine total N test has been discussed by the US potato industry as another diagnostic tool to understand the overall N uptake of the plant, but little data are available. A 2-year field study was conducted at the University of Wisconsin Hancock Agricultural Research Station in 2018 and 2019 with the objective to compare three diagnostic tools, petiole nitrate analysis, whole leaf total N test and whole vine total N test, for identifying the nutrient status of two chipping potato cultivars subjected to five different N rates. It was found that petiole nitrate analysis is still the most responsive method to reflect supplemental N application during the growing season and is the most relevant to final tuber yield. Whole leaf total N test is less responsive, but it can reflect plant N uptake up to the date of testing. Comparatively, whole vine total N test is not acceptable because of the excessive amount of time needed to collect and process the samples, and the concern over whether or not the sample tested in the last step of analysis is representative. Future diagnostic tools using cutting-edge remote sensing and machine learning technologies that can detect spatial variability should be developed to further enhance the effectiveness of in-season N monitoring, which is critical for sustainable potato production.



中文翻译:

评估用于监测美国中西部上部切片马铃薯季节性氮状态的多种诊断工具

马铃薯生产需要大量施氮 (N)。为了保持产量和盈利能力,马铃薯农民必须通过在生长季节施肥来满足作物对氮的需求。之前已经研究了叶柄硝酸盐分析和全叶全氮测试以指导当季施氮,两者各有优缺点。美国马铃薯行业已经讨论了全株总氮测试作为了解植物整体氮吸收的另一种诊断工具,但可用的数据很少。威斯康星大学汉考克农业研究站于 2018 年和 2019 年进行了为期 2 年的实地研究,目的是比较三种诊断工具,即叶柄硝酸盐分析、全叶全氮测试和全葡萄全氮测试,用于确定在五种不同施氮量下的两个切片马铃薯品种的营养状况。发现硝酸叶柄分析仍然是反映生长季节补充施氮的最敏感方法,并且与最终块茎产量最相关。全叶总氮测试响应性较差,但可以反映截至测试日期的植物 N 吸收情况。相比之下,整株葡萄总氮测试是不可接受的,因为收集和处理样品需要过多的时间,并且担心最后分析步骤中测试的样品是否具有代表性。应开发使用尖端遥感和机器学习技术来检测空间变异性的未来诊断工具,以进一步提高季节性 N 监测的有效性,

更新日期:2021-06-17
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