Straw degradation and nitrogen release from cover crops under no-tillage

Autor: Nascente, Adriano Stephan, Crusciol, Carlos Alexandre Costa [UNESP], Stone, Luis Fernando
Přispěvatelé: Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA), Universidade Estadual Paulista (Unesp)
Jazyk: angličtina
Rok vydání: 2014
Předmět:
Zdroj: Web of Science
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
Popis: Made available in DSpace on 2015-03-18T15:56:45Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-01-01Bitstream added on 2015-03-18T16:28:09Z : No. of bitstreams: 1 WOS000340739800018.pdf: 186319 bytes, checksum: b188c5f977e0ae35e29e445c9835c152 (MD5) Crops used to cover the ground may also release nitrogen into the soil during mineralization. However, it is necessary to identify species that combine fast nutrient release and longer permanence of the straw on the soil surface. The aim of this study was to investigate straw degradation and nitrogen release from cover crops under no-tillage cropping systems. The field trial was performed during two growing seasons in summer (2008/2009 and 2009/2010) in the Cerrado region of Brazil. The experimental design was a randomized block in factorial arrangement. Treatments were the combination of five plants (four cover crops species, 1 - Panicum maximum, 2- Brachiaria ruziziensis, 3. Brachiaria brizantha and 4. Pennisetum glaucum [millet], and fallow as a control) with six sampling times (first six weeks after application of glyphosate on the cover crops). Pennisetum glaucum and fallow showed faster straw degradation and nitrogen release. The cover crops Panicum maximum, Brachiaria brizantha and Brachiaria ruziziensis stood out in biomass production and in the amount of nitrogen in their shoots but had the lowest coefficients of degradation and persisted longer on the soil surface than Pennisetum glaucum and fallow. Embrapa Arroz & Feijao, BR-75375000 Santo Antonio De Goias, Go, Brazil Univ Estadual Paulista UNESP, Fac Ciencias Agron, Dept Agr, BR-18610307 Botucatu, SP, Brazil Univ Estadual Paulista UNESP, Fac Ciencias Agron, Dept Agr, BR-18610307 Botucatu, SP, Brazil
Databáze: OpenAIRE
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