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Nitrogen volatilized during the grazing of dryland kikuyu pastures

Nitrogen volatilized during the grazing of dryland kikuyu pastures Abstract Using a micrometeorological mass balance method, a study was undertaken to assess volatilized nitrogen (N) losses during and after the grazing of dryland Pennisetum clandestinum Hochst. (kikuyu) pastures. Specific objectives were to measure the magnitude of volatilized N loss and to establish the pattern of volatilized N loss over time. Nitrogen losses measured over a period of 120 h ranged from 88 to 946 g N ha‐1 (at a stocking rate of 3 AU ha‐1), and from 240 to 2 685 g N ha‐1 (at a stocking rate of 6 AU ha‐1 stocking rate). In terms of achieving lower losses, the mean difference in N lost as NH3 was in favour of the lower stocking rate (3 AU ha‐1), estimated at 1 051 ± 324 g NH3 ha‐1 (P≤0.05). A consistent pattern of NH3 loss was shown to occur during the season, with higher losses being recorded during the day time and lower losses at night. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png African Journal of Range & Forage Science Taylor & Francis

Nitrogen volatilized during the grazing of dryland kikuyu pastures

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Nitrogen volatilized during the grazing of dryland kikuyu pastures

Abstract

Abstract Using a micrometeorological mass balance method, a study was undertaken to assess volatilized nitrogen (N) losses during and after the grazing of dryland Pennisetum clandestinum Hochst. (kikuyu) pastures. Specific objectives were to measure the magnitude of volatilized N loss and to establish the pattern of volatilized N loss over time. Nitrogen losses measured over a period of 120 h ranged from 88 to 946 g N ha‐1 (at a stocking rate of 3 AU ha‐1), and from 240 to 2 685...
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Publisher
Taylor & Francis
Copyright
Copyright Taylor & Francis Group, LLC
ISSN
1727-9380
eISSN
1022-0119
DOI
10.1080/10220119.1993.9638330
Publisher site
See Article on Publisher Site

Abstract

Abstract Using a micrometeorological mass balance method, a study was undertaken to assess volatilized nitrogen (N) losses during and after the grazing of dryland Pennisetum clandestinum Hochst. (kikuyu) pastures. Specific objectives were to measure the magnitude of volatilized N loss and to establish the pattern of volatilized N loss over time. Nitrogen losses measured over a period of 120 h ranged from 88 to 946 g N ha‐1 (at a stocking rate of 3 AU ha‐1), and from 240 to 2 685 g N ha‐1 (at a stocking rate of 6 AU ha‐1 stocking rate). In terms of achieving lower losses, the mean difference in N lost as NH3 was in favour of the lower stocking rate (3 AU ha‐1), estimated at 1 051 ± 324 g NH3 ha‐1 (P≤0.05). A consistent pattern of NH3 loss was shown to occur during the season, with higher losses being recorded during the day time and lower losses at night.

Journal

African Journal of Range & Forage Science – Taylor & Francis

Published: Aug 1, 1993

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