The LTAR Cropland Common Experiment at Platte River/High Plains Aquifer

IF 2.2 4区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of environmental quality Pub Date : 2024-10-22 DOI:10.1002/jeq2.20648

Ariel Freidenreich, Marty R. Schmer, Makki Khorchani, Girma Birru, Virginia L. Jin, Tala Awada, Rhae A. Drijber, Andrew Suyker, S. Carolina Córdova, Tyler Smith, Tim Kettler, Sandra Christofferson, Xiangmin Sun, Lidong Li

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Abstract

The Platte River/High Plains Aquifer (PR/HPA) region is characterized by cropland, pastures, and grasslands that are faced with changing climatic conditions and agricultural intensification. The PR/HPA Long-Term Agroecosystem Research (LTAR) site is located in Eastern Nebraska with the goal of improving resilience, sustainability, and profitability of agroecosystems through enhancing ecosystem services and environmental quality, developing strategies for efficient agricultural production, and mitigating and adapting to climate change. To meet this goal, a common experiment and five ancillary experiments have been developed to evaluate prevailing regional practices in grain crop production systems compared to alternative practices in rainfed and irrigated systems. These experiments reflect different geographic regions and cropping systems within PR/HPA. The common experiment is at a plot scale under sub-drip irrigation. The prevailing practice is a corn–soybean rotation with a fixed N fertilizer rate. The alternative practice is a corn-winter wheat-relay cropped soybean rotation with temporally variable N rates using fertigation. There is also an auxiliary alternative practice, a corn–soybean rotation with temporally variable N rates using fertigation with fall manure application after soybean harvest. This document describes the regional characteristics, cropland LTAR experiments, stakeholder engagement, and future plans for the PR/HPA cropland experiments.

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普拉特河/高原含水层的 LTAR 耕地共同实验。

普拉特河/高原含水层（PR/HPA）地区的特点是耕地、牧场和草地面临着不断变化的气候条件和农业集约化。PR/HPA 长期农业生态系统研究（LTAR）基地位于内布拉斯加州东部，其目标是通过提高生态系统服务和环境质量、制定高效农业生产战略以及减缓和适应气候变化，提高农业生态系统的恢复能力、可持续性和盈利能力。为实现这一目标，我们开发了一项共同实验和五项辅助实验，以评估谷物作物生产系统中的地区现行做法，并与雨水灌溉和灌溉系统中的替代做法进行比较。这些实验反映了 PR/HPA 的不同地理区域和种植系统。共同试验是在滴灌条件下进行的小区试验。现行做法是玉米-大豆轮作，氮肥施用量固定。替代做法是玉米-冬小麦-轮作大豆轮作，使用灌溉施肥，氮肥用量随时间变化。还有一种辅助替代方法，即玉米-大豆轮作，施肥量随时间变化，大豆收获后秋季施肥。本文件介绍了 PR/HPA 耕地试验的区域特征、耕地 LTAR 试验、利益相关者参与情况以及未来计划。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of environmental quality 环境科学-环境科学

CiteScore

4.90

自引率

8.30%

发文量

123

审稿时长

3 months

期刊介绍： Articles in JEQ cover various aspects of anthropogenic impacts on the environment, including agricultural, terrestrial, atmospheric, and aquatic systems, with emphasis on the understanding of underlying processes. To be acceptable for consideration in JEQ, a manuscript must make a significant contribution to the advancement of knowledge or toward a better understanding of existing concepts. The study should define principles of broad applicability, be related to problems over a sizable geographic area, or be of potential interest to a representative number of scientists. Emphasis is given to the understanding of underlying processes rather than to monitoring. Contributions are accepted from all disciplines for consideration by the editorial board. Manuscripts may be volunteered, invited, or coordinated as a special section or symposium.