Research note:The effect of sward height on volatilised nitrogen from a drylandPennisetum clandestinumHochst. pasture
作者:
F.R. Mckenzie,
N.M. Tainton,
期刊:
African Journal of Range & Forage Science
(Taylor Available online 1994)
卷期:
Volume 11,
issue 2
页码: 59-60
ISSN:1022-0119
年代: 1994
DOI:10.1080/10220119.1994.9638358
出版商: Taylor & Francis Group
关键词: Ammonia;kikuyu;urea
数据来源: Taylor
摘要:
An experiment, using the micrometeorological mass balance method, was conducted to determine the effect of pasture sward height on volatilized nitrogen (N) losses. An altered sward structure (cut to a height of 30 mm) demonstrated higher volatilized N losses after fertilizer application than a sward retaining approximately 1.00 mm of residual herbage. The mean difference between treatments was estimated at 765 ± 109 g N ha‐1(P<0.05) for 33 h after the application of urea at 50 kg N ha‐1. This implies that residual herbage remaining on a pasture at the time of N fertilizer application may reduce volatilized N from the pasture.
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