Cycling Phosphorus and Nitrogen through Cropping Systems in an Intensive Dairy Production Region
Cycling Phosphorus and Nitrogen through Cropping Systems in an Intensive Dairy Production Region
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DOI：
10.3390/agronomy11051005
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发表时间：
2021-05
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通讯作者：
A. Leytem;P. Williams;S. Zuidema;Audrey M Martinez;Y. Chong;A. Vincent;Aaron Vincent;D. Cronan;A. Kliskey;J. Wulfhorst;L. Alessa;D. Bjorneberg
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作者：
A. Leytem;P. Williams;S. Zuidema;Audrey M Martinez;Y. Chong;A. Vincent;Aaron Vincent;D. Cronan;A. Kliskey;J. Wulfhorst;L. Alessa;D. Bjorneberg
随着乳制品行业减少其环境影响的压力增加，通过当地种植系统有效回收粪便养分变得至关重要。本研究的目的是计算位于爱达荷州魔法谷的六个县的年度氮（N）和磷（P）预算，并估计在当前奶牛种群和种植系统的情况下，需要将粪便运输到与作物养分需求平衡的距离。我们的分析表明，作物对氮的需求将不能仅仅通过粪肥来满足，需要施用合成肥料。然而，为了平衡磷与作物生产，粪肥需要从奶牛场运输至少12.9公里，并且必须在91%的区域农田上取代合成肥料磷。有必要对生产者和技术专家进行教育，以改进区域种植系统中粪肥使用的管理。技术解决方案，如牛的替代饮食和从粪肥流中捕获养分，也可能是必要的，使区域磷平衡，以保护环境质量和提高区域乳制品行业的可持续性。
As pressure on the dairy industry to reduce its environmental impact increases, efficient recycling of manure nutrients through local cropping systems becomes crucial. The aim of this study was to calculate annual nitrogen (N) and phosphorus (P) budgets in six counties located in the Magic Valley, Idaho and estimate what distance manure would need to be transported to be in balance with crop nutrient demand given current dairy cattle populations and cropping systems. Our analysis suggests that crop N needs will not be met solely by manure, and synthetic fertilizer will need to be applied. However, to balance P with crop production, manure would need to be transported a minimum of 12.9 km from dairies and would have to replace synthetic fertilizer P on 91% of regional cropland. Education of producers and technical specialists would be necessary to improve the management of manure use in regional cropping systems. Technical solutions such as alternative diets for cattle and nutrient capture from manure streams will also likely be necessary to bring regional P into balance to protect environmental quality and improve the sustainability of the regional dairy industry.