Effect of <i>Lolium perenne</i> population differences on shoot tissue nitrogen concentrations when grown on a peat soil

Abstract Grass nitrogen (N) concentrations of dairy grasslands are higher on peat soil than mineral soils. This can lead to increased N losses air and water from farming systems Our hypothesis was that the use low-N perennial ryegrass ( Lolium perenne L.) genotypes could be a means lower grass concentrations, when grown objective determine whether populations with different shoot tissue recorded sandy soil, would show efficiencies (NUE) or uptake (NUptE) soil. First, pot experiment lasting 62 days carried out nine diploid seven tetraploid populations, followed by field two control 30 months. Both experiments had three fertilization levels. In experiment, explained 3% variation in concentration among tetraploids, 5 7% NUE diploids tetraploids 12% NUptE diploids. 44% NUptE. A coincided experiment. We conclude there is potential alter via selection for NUE.