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Registros recuperados: 3
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Microbial biomass and soil fauna during the decomposition of cover crops in no-tillage system Rev. Bras. Ciênc. Solo
Gatiboni,Luciano Colpo; Coimbra,Jefferson Luis Meirelles; Denardin,Rosiane Berenice Nicoloso; Prado Wildner,Leandro do.
The decomposition of plant residues is a biological process mediated by soil fauna, but few studies have been done evaluating its dynamics in time during the process of disappearance of straw. This study was carried out in Chapecó, in southern Brazil, with the objective of monitoring modifications in soil fauna populations and the C content in the soil microbial biomass (C SMB) during the decomposition of winter cover crop residues in a no-till system. The following treatments were tested: 1) Black oat straw (Avena strigosa Schreb.); 2) Rye straw (Secale cereale L.); 3) Common vetch straw (Vicia sativa L.). The cover crops were grown until full flowering and then cut mechanically with a rolling stalk chopper. The soil fauna and C content in soil microbial...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Microbial carbon; Straw decomposition; Soil microorganisms; Plant residues.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000400008
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Morphophysiological characterization of giant missionary grass accessions R. Bras. Zootec.
Lajús,Cristiano Reschke; Scheffer-Basso,Simone Meredith; Miranda,Mario; Denardin,Rosiane Berenice Nicoloso; Valls,José Francisco Montenegro.
In this study, the phenotypic diversity of five accessions of giant missionary grass (Axonopus jesuiticus × A. scoparius) was evaluated by using morphophysiological traits. Accessions V 14337, V 14403, V 14404, V 14405 and V 14406 are hybrids derived from spontaneous crossing that occurred in Vale do Itajaí, Santa Catarina, Brazil. Plants were cultivated in greenhouse and evaluated at 60, 90, 120, 150, 180, 210 and 240 days of growth. Variation was observed for dry matter production, phenology and morphological traits, showing the possibility of selection. Flowering started at 210 days of growth and only in accessions V 14337 and V 14404. The Mahalanobis distance among accessions ranged from 35.64 (V 14403 and V 14405) to 183.38 (V 14337 and V 14405), and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: A. catharinensis; Dry matter production; Growth analysis; Phenology.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011001100004
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Dry matter production and nitrogen use efficiency of giant missionary grass in response to pig slurry application R. Bras. Zootec.
Miranda,Mario; Scheffer-Basso,Simone Meredith; Escosteguy,Pedro Alexandre Varella; Lajús,Cristiano Reschke; Scherer,Eloi Erhard; Denardin,Rosiane Berenice Nicoloso.
This study assessed the effect of successive applications of pig slurry on the dry matter (DM) production and the nitrogen use efficiency of giant missionary grass along two years. A total of 55, 110, 165, 220 and 275 m³ of pig slurry/ha/year were applied in order to supply 100, 200, 300, 400 and 500 kg of total N/ha/year, respectively. These treatments were compared with the ammonium nitrate (200 kg of N/ha/year) source of N and with a control (no nitrogen application). Annually, nitrogen was applied in four divided doses, after the cutting of forage grasses, which takes place five times a year. The total DM yield did not differ between years and increased linearly as a function of pig slurry application, ranging from 2,698 kg of DM/ha/year (control) to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: A. jesuiticus × A. scoparius; Organic fertilization; Pasture.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000300009
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