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首页> 外文会议>International Conference on Precision Agriculture >IN-SEASON N FERTILIZATION USING AN IN-SEASON ESTIMATE OF POTENTIAL YIELD
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IN-SEASON N FERTILIZATION USING AN IN-SEASON ESTIMATE OF POTENTIAL YIELD

机译：使用季节性产量的季节性估计季节性施肥

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摘要

Fertilization rates in cereal production systems are generally determined by subtracting soil test N from a specified yield goal-based N requirement. This study was conducted to determine if an algorithm using in-season-estimated-yield (INSEY) in winter wheat (Triticum aestivum L.) could be used to refine N fertilization rates and ultimately increase yield. INSEY was computed using the sum of two post-dormancy NDVI measurements (January and March), divided by the cumulative growing degree-days from the first to second reading. At both sites, variable rate application (each 1m2 treated independently) based on INSEY increased wheat yield when compared to fixed rates, while using much lower fertilizer N. Also, efficiency of use (grain produced per kg of N applied) was highest at both sites when N fertilizer was applied based on the INSEY algorithm When yield potentials are accurately determined, increased yields are more likely to be realized, as a result of treating small-scale spatial variability.
机译：谷物生产系统中的施肥率通常通过从特定产量的基于目标N要求中减去土壤试验N来确定。进行该研究以确定冬小麦（Triticum Aestivum L.）中使用季节性估计产率（insey）的算法可用于细化N施肥率并最终增加产量。 insey使用两个后休眠后的NDVI测量（1月和3月）的总和计算，除以从第一次到第二次阅读的累积增长度日。在两个站点，与固定速率相比，基于炔灭息时，在两个站点，可变速率施用（每个1M2独立处理）增加小麦产量，同时使用远低肥料N.此外，使用效率（施用每千克N的谷物）在两者中最高当基于炔灭绝的矿物算法施加n施肥时，当治疗小规模空间可变性时，更容易实现施用N施肥。

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