Nitrogen availability is the primary limitation for the growth of tall fescue, Argentina's most widely cultivated cool-season pasture. Significant yield gaps exist in fescue pastures on commercial farms, where average annual yields are around 5 t/ha, compared to a potential yield of 10 to 15 t/ha. Nitrogen fertilization remains uncommon among cow-calf producers, highlighting the need for a deeper understanding of the complex interactions between nitrogen fertilizer management, stocking rate, and grazing management at the whole-farm level. Considering annual and inter-annual variations in pasture growth could enable regional beef producers to make more informed decisions, improving pasture yield potential, utilization, and overall farm profitability.

中文翻译：

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在阿根廷洪泛潘帕斯草原使用模型识别氮肥策略，以填补奶牛-犊牛系统的饲喂缺口


氮的可用性是高羊茅生长的主要限制因素，高羊茅是阿根廷种植最广泛的冷季牧场。商业农场的羊茅牧场存在显著的产量差距，平均年产量约为 5 吨/公顷，而潜在产量为 10 至 15 吨/公顷。氮肥在奶牛犊牛生产者中仍然不常见，这凸显了需要更深入地了解整个农场层面的氮肥管理、放牧率和放牧管理之间的复杂相互作用。考虑牧场生长的年度和年度间变化可以使区域牛肉生产商做出更明智的决策，提高牧场产量潜力、利用率和整体农场盈利能力。