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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
01/08/1992 |
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Data da última atualização: |
04/01/2024 |
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Autoria: |
VALLIS, I.; HARPER, L. A.; CATCHPOOLE, V. R.; WEIER, K. L. |
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Título: |
Volatilization of ammonia from urine patehes in a subtropical pasture. |
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Ano de publicação: |
1982 |
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Fonte/Imprenta: |
Australian Journal of Agricultural Research, v. 33, n. 1, p. 97-107, 1982. |
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DOI: |
https://doi.org/10.1071/AR9820097 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Ammonia volatilization from artificially applied cattle urine was measured in a fertilized (374 kg nitrogen ha-1 year-1) and grazed (4 beef steers ha-1) pasture of Nandi setaria (Setaria sphacelata var. sericea) in south-eastern Queensland. Microplots (0.5 by 0.5 m) of pasture were treated with 1.4 1. of urine (= 37-48 g nitrogen m-2) and evolved ammonia measured with a flow-through chamber system that maintained near ambient temperatures and air flows. Calculated volatilization over a 14-day period was 18.8 % of the applied urine nitrogen in June, 14.4 % in November-December and 28.4 % in February-March. More than half of the volatilization occurred within 48 h of applying the urine. Measurements of soil mineral nitrogen in February-March showed that more than 80% of the urinary urea was hydrolysed within 2 h and only traces remained unhydrolysed after 24 h. Soil ammonium declined from 700 to 1000 ¦g nitrogen cm-3 in the surface 2.5 cm on the first day to near-background levels on the 14th day. Accumulation of nitrate was rapid after the 2nd day, and accounted for one-third of the applied nitrogen by the 14th day. Nitrite reached a maximum of 2.3 % of the applied nitrogen on the 7th day and had virtually disappeared by the 14th day. Only traces of nitrite were detected below 2.5 cm depth. |
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Palavras-Chave: |
Fertilizacao. |
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Thesagro: |
Pastagem. |
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Thesaurus Nal: |
Ammonia; Cattle; Nitrites; Urine; Volatilization. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02013naa a2200253 a 4500
001 1519809
005 2024-01-04
008 1982 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1071/AR9820097$2DOI
100 1 $aVALLIS, I.
245 $aVolatilization of ammonia from urine patehes in a subtropical pasture.
260 $c1982
520 $aAbstract: Ammonia volatilization from artificially applied cattle urine was measured in a fertilized (374 kg nitrogen ha-1 year-1) and grazed (4 beef steers ha-1) pasture of Nandi setaria (Setaria sphacelata var. sericea) in south-eastern Queensland. Microplots (0.5 by 0.5 m) of pasture were treated with 1.4 1. of urine (= 37-48 g nitrogen m-2) and evolved ammonia measured with a flow-through chamber system that maintained near ambient temperatures and air flows. Calculated volatilization over a 14-day period was 18.8 % of the applied urine nitrogen in June, 14.4 % in November-December and 28.4 % in February-March. More than half of the volatilization occurred within 48 h of applying the urine. Measurements of soil mineral nitrogen in February-March showed that more than 80% of the urinary urea was hydrolysed within 2 h and only traces remained unhydrolysed after 24 h. Soil ammonium declined from 700 to 1000 ¦g nitrogen cm-3 in the surface 2.5 cm on the first day to near-background levels on the 14th day. Accumulation of nitrate was rapid after the 2nd day, and accounted for one-third of the applied nitrogen by the 14th day. Nitrite reached a maximum of 2.3 % of the applied nitrogen on the 7th day and had virtually disappeared by the 14th day. Only traces of nitrite were detected below 2.5 cm depth.
650 $aAmmonia
650 $aCattle
650 $aNitrites
650 $aUrine
650 $aVolatilization
650 $aPastagem
653 $aFertilizacao
700 1 $aHARPER, L. A.
700 1 $aCATCHPOOLE, V. R.
700 1 $aWEIER, K. L.
773 $tAustralian Journal of Agricultural Research$gv. 33, n. 1, p. 97-107, 1982.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
