A field study conducted over three growing seasons (2013–2015) assessed the effect of long-term fertilization history and crop rotation on growing season nitrous oxide (N2O) and carbon dioxide (CO2) emissions, wheat yield, wheat N uptake, N2O emission intensity, and soil properties on a Gray Luvisol soil. Long-term fertility treatments included check, manure, NPKS, NPK, and PKS fertilizers in two contrasting crop rotations: 2 yr wheat (Triticum aestivum L.) – fallow (WF), and 5 yr wheat (T. aestivum L.) – oat (Avena sativa) – barley (Hordeum vulgare L.) – alfalfa (Medicago sativa) – brome (Bromus tectorum) hay (WOBHH). Rotation significantly affected cumulative growing season N2O emissions, and within each rotation, long-term fertilizer or manure N additions increased N2O emissions over the check. Average, cumulative growing season N2O emissions in the 5 yr rotation were 1.29 kg N2O-N ha-1, significantly higher than the 0.58 kg N2O-N ha-1 in the WF rotation, but N2O emission intensities were comparable between the two rotations. Cumulative N2O emissions were positively correlated to total soil N (0–15 cm) and wheat N uptake, but N2O emission intensities were negatively correlated to total soil N. However, it is uncertain whether this result extends to annual emission intensities because of a lack of nongrowing season measurements.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.