Theme 04: Soil Fertility and Plant Nutrition
Description
This work intends to study N leaching losses in a field assay when crimson clover (Trifolium incarnatum) and italian ryegrass (Lolium multiflorum) was incorporated into the soil and quantify the their effect on N2O, N total gaseous losses under controlled soil moisture and temperature conditions. Field assay: A split-plot design where main plot was the cover crop and the subplot was the rate of fertilizer (0 and 150 kg N ha-1) applied to the subsequent maize crop. Laboratory assay: Residues of italian ryegrass and crimson clover were mixed with soil in containers, leaving one set of unamended controls. Incubations of soil during 27 days with a 0, 5 or 0.01 % C2H2 atmosphere allow us to obtain potential N2O and N total gaseous losses. In the field experiment crimson clover incorporation was better than ryegrass to resolve nitrate leaching losses due to 150 kg N ha-1 applied to maize although clover incorporation in the laboratory assay seemed to increase the risk of N2O emissions despite most gaseous losses were in the form of N2.
Citation
Báez, D.; Pinto, M.; Rodríguez, M.; Besga, G.; and Estavillo, J. M., "The Use of Cover Crops After a Maize Crop in the North of Spain" (2021). IGC Proceedings (1993-2023). 3.
https://uknowledge.uky.edu/igc/19/4/3
Included in
The Use of Cover Crops After a Maize Crop in the North of Spain
This work intends to study N leaching losses in a field assay when crimson clover (Trifolium incarnatum) and italian ryegrass (Lolium multiflorum) was incorporated into the soil and quantify the their effect on N2O, N total gaseous losses under controlled soil moisture and temperature conditions. Field assay: A split-plot design where main plot was the cover crop and the subplot was the rate of fertilizer (0 and 150 kg N ha-1) applied to the subsequent maize crop. Laboratory assay: Residues of italian ryegrass and crimson clover were mixed with soil in containers, leaving one set of unamended controls. Incubations of soil during 27 days with a 0, 5 or 0.01 % C2H2 atmosphere allow us to obtain potential N2O and N total gaseous losses. In the field experiment crimson clover incorporation was better than ryegrass to resolve nitrate leaching losses due to 150 kg N ha-1 applied to maize although clover incorporation in the laboratory assay seemed to increase the risk of N2O emissions despite most gaseous losses were in the form of N2.
