Pig slurry in carpet grass pasture: Yield and plant-available nitrogen

ABSTRACT This study evaluated the response of carpet grass to pig slurry fertilization in order to estimate the agronomic efficiency and the plant-available nitrogen (N) of such manure. A field test was conducted during two years, following a randomized block design with six replicates of the treatm...

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Published inRevista brasileira de engenharia agrícola e ambiental Vol. 20; no. 9; pp. 795 - 799
Main Authors Brustolin-Golin, Karen D., Scheffer-Basso, Simone M., Escosteguy, Pedro A. V., Miranda, Mario, Travi, Magdalena R. L., Zabot, Valdirene
Format Journal Article
LanguageEnglish
Portuguese
Published Departamento de Engenharia Agrícola - UFCG 01.09.2016
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Summary:ABSTRACT This study evaluated the response of carpet grass to pig slurry fertilization in order to estimate the agronomic efficiency and the plant-available nitrogen (N) of such manure. A field test was conducted during two years, following a randomized block design with six replicates of the treatments: 0, 100, 200, 300, 400 and 500 kg N ha-1 year-1, which resulted in 0, 60, 120, 180, 240 and 300 m3 ha-1 (2008/09), and 0, 42, 84, 126, 168 and 210 m3 ha-1 (2009/10), according to the N content of the pig slurry used in each year. These treatments were compared with ammonium nitrate (200 kg N ha-1 year-1), in order to estimate the plant-available nitrogen of the manure for the pasture. Pig slurry doses increased linearly the dry matter yield. In 2008/2009, it was increased from 2,600 (0 kg N ha-1) to 7,718 kg ha-1 (500 kg N ha-1), while in 2009-2010 it ranged from 4,310 (0 kg N ha-1) to 12,321 kg ha-1 (500 kg N ha-1). The average agronomic efficiency of the manurewas 15 kg DM kg-1 N and it was lower than that found with ammonium nitrate (27 kg DM kg-1 N).The estimated plant-available N of the pig slurry was similar between the growing years. The N fraction of this manure available to the pasture was 0.64 (2008-09) and 0.60 (2009-10). RESUMO Este estudo avaliou a resposta da grama-tapete à aplicação de dejeto líquido de suíno para determinar a eficiência agronômica e estimar a disponibilidade de nitrogênio desse esterco. O experimento foi realizado em condições de campo durante dois anos, em delineamento em blocos ao acaso, com seis repetições dos seguintes tratamentos: 0, 100, 200, 300, 400 e 500 kg N ha-1 ano-1, o que resultou em 0, 60, 120, 180, 240 e 300 m3 ha-1 ano-1 (2008/2009) e em 0, 42, 84, 126, 168 e 210 m3 ha-1 ano-1 (2009-2010), de acordo com o conteúdo de nitrogênio do dejeto utilizado em cada ano. Esses tratamentos foram comparados com o nitrato de amônio (200 kg N ha-1 ano-1). A produção de matéria seca em resposta às doses do dejeto líquido de suíno foi linear. Em 2008/2009 a matéria seca variou de 2.600 (0 kg N ha-1) a 7.718 kg ha-1 (500 kg N ha-1), e em 2009-2010, oscilou entre 4.310 (0 kg N ha-1) e 12.321 kg ha-1 (500 kg N ha-1). A eficiência agronômica média do dejeto foi de 15 kg MS kg-1 N e inferior à obtida com o nitrato de amônio (27 kg MS kg-1 N). A quantidade de N disponível do dejeto variou pouco entre os anos. A fração de N disponibilizada desse esterco para a pastagem foi de 0,64 (2008-09) e de 0,60 (2009-10).
ISSN:1415-4366
1807-1929
1415-4366
DOI:10.1590/1807-1929/agriambi.v20n9p795-799