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Efeito de sistemas de integração lavoura-pecuária sob plantio direto em alguns atributos físicos do solo. Repositório Alice
SPERA, S. T.; SANTOS, H. P. dos; FONTANELI, R. S.; DREON, G..
2012
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Densidade; Pastagem perene; Porosidade; Density; Perennial pasture; Porosity.
Ano: 2012 URL: http://www.alice.cnptia.embrapa.br/handle/doc/946188
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Sustainability, Externalities and Economics: The Case of Temperate Perennial Grazing Systems in NSW AgEcon
Jones, Randall E.; Dowling, Peter.
The replacement of perennial grass species by undesirable annual grass weeds not only results in lower productivity but is also contributes to a range of external costs. In particular, shallow rooted annuals result in greater deep drainage and therefore a greater potential for salinity, and greater volumes of runoff of poor quality water to streams. In this paper an economic framework for examining the sustainability issues of a perennial grazing system on the NSW Central Tablelands is presented. This involves a combination of simulation and dynamic programming models, with the state of the system represented by variables for the perennial grass composition and soil fertility. The paper examines a range of management strategies that increase the perennial...
Tipo: Report Palavras-chave: Perennial pasture; Sustainability; Externalities; Bioeconomic modelling; Dynamic programming; Research and Development/Tech Change/Emerging Technologies; 160.
Ano: 2004 URL: http://purl.umn.edu/42504
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Pig slurry in carpet grass pasture: Yield and plant-available nitrogen AGRIAMBI
Brustolin-Golin,Karen D.; Scheffer-Basso,Simone M.; Escosteguy,Pedro A. V.; Miranda,Mario; Travi,Magdalena R. L.; Zabot,Valdirene.
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,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Axonopus affinis; Agronomic nitrogen efficiency; Nitrogen efficiency index; Manure; Perennial pasture.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000900795
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