Nitrogen dynamics after low-emission applications of dairy slurry or fertilizer on perennial grass: a long term field study employing natural abundance of δ15N

TitleNitrogen dynamics after low-emission applications of dairy slurry or fertilizer on perennial grass: a long term field study employing natural abundance of δ15N
Publication TypeJournal Article
Year of Publication2021
AuthorsZhang H., Hunt D.E, Ellert B., Maillard E., Kleinman P.JA, Spiegal S, Angers D.A, Bittman S
JournalPlant Soil
Volume465
Pagination415–430
Date Published6/9/2021
ARIS Log Number379165
KeywordsCrop N uptake, Fine heavy fraction, Grass herbage, Liquid dairy manure, Mineral fertilizer, Nitrogen use efficiency, Soil N, Δ15N natural abundance
Abstract

Defining the long-term effects of liquid dairy manure (LDM) applied by a recommended low emission method is important to ensure sustainable grass production and dairy operations. We used natural abundance δ15N and conventional measurements in a long term field experiment to better understand the long-term fate of N applied as LDM, mineral fertilizer (MIN) and both (ALT).

Methods
We investigated the effects of long-term applications of LDM (with low-emission trailing shoe), MIN, and alternating LDM and MIN (ALT) on grass N uptake, soil N stocks, N losses and δ15N natural abundance in grass, soil and fine heavy fraction (silt + clay size heavy soil). Nominal annual rates of total N were 200 and 400 kg ha−1 for MIN and 400 and 800 kg ha−1 for LDM.

URLfiles/bibliography/21-045.pdf
DOI10.1007/s11104-021-04998-7