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Maize Yield and Planting Date Relationship: A Synthesis-Analysis for US High-Yielding Contest-Winner and Field Research Data

机译:玉米产量与播种期的关系:美国高产竞赛获胜者和田间研究数据的综合分析

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摘要

For maize (Zea mays L.), early planting date could be of advantage to high yields but a review of planting date effect on high-yielding data is not yet available. Following this rationale, a synthesis-analysis was conducted from the farmer annual maize contest-winner data (n = 16171 data points; 2011–2016 period); cordially provided by the National Corn Growers Association and a scientific literature dataset collected from research publications since the last three decades. The main objectives of this study were to: (i) identify spatial yield variability within the high-yielding maize dataset; (ii) understand the impacts of planting date on yield variability; (iii) explore the effect of management practices on maize yield-planting date relationship, and (iv) utilize the yield-planting date dataset collected via farmer contest-winner as a benchmarking data to be compared to the compendium of scientific literature available for yield-planting date relationship for the primary US maize producing regions. Major findings of this study are: (i) significant correlation between planting date and latitude, (ii) maize yield was maximized when planting window was 89–106 day of the year (DOY) for the 30–35°N, 107–118 DOY for the 35–40°N, <119 DOY for 40–45°N, and <129 DOY for 45–50°N, and (iii) both, yield contest and literature datasets portrayed that planting date becomes a more relevant factor when planting late, presenting a relatively smaller planting window in high-compared to low-latitudes.
机译:对于玉米(Zea mays L.)而言,早播可能有利于高产,但尚无综述播种日期对高产数据的影响。根据这一基本原理,从农民年度玉米竞赛获奖者数据(n = 16171个数据点; 2011-2016年)进行了综合分析。由国家玉米种植者协会和最近三十年来从研究出版物中收集的科学文献数据集诚挚地提供。这项研究的主要目的是:(i)确定高产玉米数据集内的空间产量变异性; (ii)了解播种日期对产量变异的影响; (iii)探索管理实践对玉米产量与种植日期关系的影响,以及(iv)利用通过农民竞赛获胜者收集的产量与种植日期数据集作为基准数据,与可用于产量的科学文献汇编进行比较美国主要玉米产区的种植日期关系。这项研究的主要发现是:(i)播种期与纬度之间存在显着相关性;(ii)在30-35°N(107-118)的播种窗为每年89-106天(DOY)时,玉米产量达到最大35–40°N的DOY,40–45°N的<119 DOY和45–50°N的<129 DOY,以及(iii)产量竞赛和文献数据集都描绘出播种日期成为一个更相关的因素当播种较晚时,在高纬度地区和低纬度地区呈现出相对较小的播种期。

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