The LTAR Grazing Land Common Experiment at Platte River High Plains Aquifer

IF 2.2 4区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES
M. Khorchani, M. Schmer, A. Freidenreich, T. Awada, G. Birru, S. Christofferson, R. Drijber, G. Erickson, V. Jin, R. McDermott, A. Suyker, A. Watson, B. Woodbury, Y. Xiong, J. Hiller, X. Sun, L. Li
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Abstract

The Long-Term Agroecosystem Research (LTAR) network of the United States Department of Agriculture (USDA) consists presently of 18 sites within the contiguous United States that are managed by the Agricultural Research Service (ARS) and its partners. The LTAR network focuses on developing national strategies for more efficient, resilient, and profitable agricultural production systems, improved environmental quality, and enhanced rural prosperity. The Platte River High Plains Aquifer (PRHPA) LTAR site is managed jointly by the University of Nebraska-Lincoln (UNL) and USDA-ARS and is one of the LTAR sites that conduct research on both integrated cropping and grazing systems. The PRHPA region encompasses multiple land resource areas and diverse agricultural production systems. The PRHPA sites, predominantly located in eastern Nebraska, are designated as an integrated system focused specifically on the region's dominant production practices of row crop (corn and soybean), managed pastures, and beef cattle production. Here, we focus on C3 cool-season smooth bromegrass (Bromus inermis Leyss.) pasture grazing systems under prevailing and alternative management practices for the region. The sites evaluate continuous and rotational grazing with and without pasture fertilization (prevailing practices). In an additional treatment, cattle are supplemented with dry distillers grains plus solubles, while manure supplies fertilization (alternative practice). Main measurements at the site evaluate plant and animal productivity, forage quality, greenhouse gas fluxes, and soil physical, chemical, and biological properties. This paper describes the regional characteristics of the PRHPA site, ongoing LTAR research related to pasture and livestock production, stakeholder engagement, and future research plans.

Abstract Image

普拉特河高原含水层的 LTAR 牧场共同实验。
美国农业部(USDA)的长期农业生态系统研究(LTAR)网络目前由美国毗连地区的 18 个站点组成,由农业研究局(ARS)及其合作伙伴负责管理。LTAR 网络的工作重点是制定国家战略,以提高农业生产系统的效率、复原力和盈利能力,改善环境质量,促进农村繁荣。普拉特河高平原含水层(PRHPA)LTAR 基地由内布拉斯加大学林肯分校(UNL)和美国农业部农业研究局(USDA-ARS)共同管理,是开展综合耕作和放牧系统研究的 LTAR 基地之一。PRHPA 地区包括多个土地资源区和多种农业生产系统。PRHPA 基地主要位于内布拉斯加州东部,被指定为一个综合系统,专门针对该地区的主要生产实践--连作(玉米和大豆)、管理型牧场和肉牛生产--进行研究。在此,我们重点研究了该地区现行管理方法和替代管理方法下的 C3 冷季型平滑香根草(Bromus inermis Leyss.)牧草放牧系统。这些研究地点评估了连续放牧和轮牧,以及牧草施肥和不施肥的情况(现行做法)。在另一种处理方法中,牛群以干蒸馏谷物加溶质作为补充,同时以粪便作为肥料(替代方法)。现场的主要测量工作是评估植物和动物的生产力、饲料质量、温室气体通量以及土壤的物理、化学和生物特性。本文介绍了 PRHPA 基地的区域特征、LTAR 正在进行的与牧场和畜牧生产相关的研究、利益相关者的参与以及未来的研究计划。
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来源期刊
Journal of environmental quality
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.
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