Mississippi state and county level yield gap in corn production

IF 2.3 4区农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY Agricultural & Environmental Letters Pub Date : 2022-10-11 DOI:10.1002/ael2.20092

Jagman Dhillon, Xiaofei Li, Raju Bheemanahalli, Vaughn Reed

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引用次数: 6

Abstract

Continuous corn (Zea mays L.) yield increases are required to promote economic development and support a larger population. Reducing the existing yield gaps is a potential strategy to accomplish this goal. The objective of this study was to evaluate yield trends, and gaps at different production levels in Mississippi using data from 2012 to 2021. Production levels considered were Mississippi yield contest (Yc), Mississippi State University hybrid testing trials under irrigation (Yp) and dryland (Yw), and actual yield (Ya) from USDA National Agricultural Statistics Service. Since 2012, Yc, Yp, and Ya are stagnant, and Yw has a nonsignificant positive trend. Averaged over 10 yr, a yield gap of 5.6 Mg ha⁻¹ between Yc and Ya, 4.1 Mg ha⁻¹ between Yp and Ya, and 2.0 Mg ha⁻¹ between Yw and Ya were noted at state level. Existing yield gap underlines current production limitations and necessitates adoption of improved agronomic practices.

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密西西比州州级和县级玉米产量存在差距

玉米（Zea mays L.）需要持续增产，以促进经济发展并支持更多的人口。减少现有的产量差距是实现这一目标的一个潜在战略。本研究的目的是利用2012年至2021年的数据，评估密西西比州不同生产水平的产量趋势和差距。所考虑的生产水平是密西西比州产量竞赛（Yc）、密西西比州立大学灌溉和旱地混合试验（Yp）以及美国农业部国家农业统计局的实际产量（Ya）。自2012年以来，Yc、Yp和Ya处于停滞状态，Yw呈现出不显著的积极趋势。在州一级，平均超过10年，Yc和Ya之间的产量差距为5.6 Mg ha−1，Yp和Ya的产量差距4.1 Mg ha–1，Yw和Ya间的产量差距2.0 Mg ha‑1。现有的产量差距突出了当前的生产限制，需要采用改进的农艺措施。

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来源期刊

Agricultural & Environmental Letters Multiple-

CiteScore

3.70

自引率

3.80%

发文量