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 PJA, 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