A field study was conducted near Saskatoon, Canada, where area- and yield-scaled N₂O emissions were evaluated for two rotation cycles of four pulse crops (chickpea [Cicer arietinum L.], faba bean [Vicia faba L.], lentil [Lens culinaris L.], and field pea [Pisum sativum L.]) followed by spring wheat (Triticum aestivum L.). A wheat-wheat sequence was included as a reference. Nitrous oxide emission measurements were made using non-steady-state chambers, and the respective contributions of growing season and spring thaw periods to cumulative emissions quantified. Of the pulse crops, lentil consistently produced the greatest cumulative N₂O emissions—during both the pulse year and the subsequent wheat year—while pea consistently yielded the lowest cumulative N₂O emissions. Area-scaled cumulative N₂O emissions for the 2-year rotation cycles ranged from 1.64 kg N₂O-N ha⁻¹ for pea to 2.84 kg N₂O-N ha⁻¹ for lentil, and emissions for the 4-year study period ranged from 3.29 kg N₂O-N ha⁻¹ for pea to 5.69 kg N₂O-N ha⁻¹ for lentil. Ranking of pulse crop area-scaled emissions for the 4-year study was pea ≤ faba bean ≤ wheat = chickpea ≤ lentil. However, when emissions were scaled for yield, the rankings changed (pea = faba bean ≤ wheat ≤ lentil ≤ chickpea) with chickpea producing higher emissions than lentil per kg seed. Including pea and faba bean in rotation with wheat could mitigate N₂O emissions whereas including chickpea and lentil in rotation with wheat failed to provide a beneficial effect in terms of mitigating N₂O emissions and, on a yield-scaled basis, can even increase emissions compared to continuous wheat.

在加拿大萨斯卡通附近进行了田野研究，对四个豆类作物（鹰嘴豆[ Cicer arietinum L.]，蚕豆[ Vicia faba L.]，小扁豆）的两个轮作周期评估了面积和产量规模的N ₂ O排放量。 [ Lens culinaris L.]和豌豆[ Pisum sativum L.]），然后是春小麦（Triticum aestivum L.）。包括小麦-小麦序列作为参考。使用非稳态箱进行一氧化二氮排放量测量，并量化了生长季节和春季解冻期对累积排放量的各自贡献。在豆类作物中，小扁豆始终产生最大的累积N _2。在豆类年和随后的小麦年中，O排放量一直保持不变，而豌豆始终保持最低的累积N ₂ O排放量。两年轮换周期的面积尺度累积N ₂ O排放量从豌豆1.64 kg N ₂ O-N ha ^-1到小扁豆2.84 kg N ₂ O-N ha ^-1，而4年研究期的排放量范围为豌豆3.29千克N ₂ O-N ha ^-1至5.69千克N ₂ O-N ha ^-1小扁豆。在为期4年的研究中，豆类作物面积尺度排放的排名是豌豆≤蚕豆≤小麦=鹰嘴豆≤小扁豆。但是，按排放量对产量进行标度后，排名发生变化（豌豆=蚕豆≤小麦≤小扁豆≤鹰嘴豆），其中鹰嘴豆的排放量要高于每公斤种子小扁豆。与小麦轮作的豌豆和蚕豆可以减轻N ₂ O的排放，而与小麦轮作的鹰嘴豆和小扁豆在减轻N ₂ O的排放方面没有产生有益的作用，并且在产量成比例的基础上，甚至可以增加与连续小麦相比的排放量。