Bahiagrass (Paspalum notatum Flüggé) is the most utilized forage in Florida and requires N fertilization to optimize production. Integrating legumes into bahiagrass pastures may reduce N fertilizer inputs and improve forage nutritive value. This 2‐yr, 2‐location, on‐farm study established two legumes, alfalfa (Medicago sativa L.) or rhizoma peanut (RP; Arachis glabrata Benth.), in mixtures with bahiagrass. We compared bahiagrass–legume mixtures + 45 kg N ha⁻¹ harvest⁻¹ with their non‐N fertilized monocultures and with bahiagrass + 90 kg N ha⁻¹ harvest⁻¹ (N‐fertilized bahiagrass). Treatments were bahiagrass, N‐fertilized bahiagrass, bahiagrass–alfalfa, bahiagrass–RP, alfalfa, and RP. Variables analyzed included herbage accumulation (HA), botanical composition, forage N concentration, forage total N aboveground (TNAG), and N agronomic efficiency. Mixtures and N‐fertilized bahiagrass resulted in similar cumulative HA (10,400 kg dry matter [DM] ha⁻¹ yr⁻¹, on average) and they were greater than all other treatments (4,190 kg DM ha⁻¹ yr⁻¹, on average). Alfalfa and RP represented low proportions of the mixed swards, with alfalfa proportion being as high as 16.1% and as low as 1.6%. Rhizoma peanut greatest proportion was 2.1% and the lowest was 0.5%. Mixtures and N‐fertilized bahiagrass maintained similar N concentrations, but they were consistently lower than legume monocultures. The N‐fertilized bahiagrass and mixture treatments resulted in the greatest TNAG in four out of the six sampling dates. The AE_N of mixtures was typically greater than N‐fertilized bahiagrass. Since legumes had low proportion in mixtures, 45 kg N ha⁻¹ harvest⁻¹ was the upper limit for reaching maximum HA in bahiagrass.

中文翻译：

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菜豆-豆科植物混合物的草本反应和氮农学效率

Bahiagrass（Paspalum notatumFlüggé）是佛罗里达州利用最多的牧草，需要氮肥才能优化产量。将豆科植物整合到Bahiagras草场中可以减少氮肥的投入并提高牧草的营养价值。这项为期2年，在2个地点进行的农场研究确定了两种豆科植物，苜蓿（Medicago sativa L.）或根茎花生（RP; Arachis glabrata Benth。）与百里香属植物的混合物。我们将Bahiagrass-豆科植物混合物+ 45 kg N ha ^-1收获^-1与他们的非N施肥单种养殖进行了比较，并将其与Bahiagrass + 90 kg N ha ^-1收获^{-1进行了比较。}（N施肥的巴哈格拉斯）。治疗方法为：Bahiagrass，N施肥的Bahiagrass，Bahiagrass-苜蓿，Bahiagrass-RP，苜蓿和RP。分析的变量包括牧草蓄积量（HA），植物组成，饲草氮浓度，地上饲草总氮（TNAG）和农艺效率。混合物和施氮的拜亚格拉斯产生的累积HA相似（平均10,400 kg干物质[DM] ha ^-1  yr ^-1），并且比所有其他处理方法（4,190 kg DM ha ^-1  yr ^{-1）都大。}， 一般）。苜蓿和RP占混合草皮的比例较低，苜蓿比例高达16.1％，低至1.6％。花生的最大比例为2.1％，最低比例为0.5％。混合物和氮肥化的马铃薯保持了相似的氮浓度，但始终低于豆类单一栽培。在六个采样日期中的四个采样日期中，N施肥的马铃薯和混合处理导致最大的TNAG。混合物的AE _N通常大于N施肥的拜亚格拉斯。由于豆类在混合物中的比例很低，因此45公斤N ha ^-1收获^-1是在马铃薯中达到最大HA的上限。