| dc.contributor | Universidade Estadual Paulista (UNESP) | |
| dc.creator | Martins, Marcio dos Reis | |
| dc.creator | Angers, Denis A. | |
| dc.creator | Cora, Jose Eduardo | |
| dc.date | 2014-05-20T13:17:14Z | |
| dc.date | 2016-10-25T16:38:44Z | |
| dc.date | 2014-05-20T13:17:14Z | |
| dc.date | 2016-10-25T16:38:44Z | |
| dc.date | 2012-03-01 | |
| dc.date.accessioned | 2017-04-05T19:37:34Z | |
| dc.date.available | 2017-04-05T19:37:34Z | |
| dc.identifier | Soil Science Society of America Journal. Madison: Soil Sci Soc Amer, v. 76, n. 2, p. 475-484, 2012. | |
| dc.identifier | 0361-5995 | |
| dc.identifier | http://hdl.handle.net/11449/3783 | |
| dc.identifier | http://acervodigital.unesp.br/handle/11449/3783 | |
| dc.identifier | 10.2136/sssaj2011.0110 | |
| dc.identifier | WOS:000300644400016 | |
| dc.identifier | http://dx.doi.org/10.2136/sssaj2011.0110 | |
| dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/853318 | |
| dc.description | In no-till systems, plants play a substantial role in soil physical conditioning because physical management is otherwise confined to sowing operations. We performed a study to determine the effect of 28 different crop sequences on soil water-stable aggregation, soil organic C (SOC), and the neutral carbohydrate composition of the surface layer (0-5-cm depth) of an Oxisol under no-till. Summer crop sequences with corn (Zea mays L.) on a continuous basis or in rotation with soybean [Glycine max (L.) Merr.] showed a higher mean weight diameter (MWD) of water-stable aggregates than those with a rice (Oryza sativa L.)-bean (Phaseolus vulgaris L.)-cotton (Gossypium hirsutum L.) rotation. Among winter crops, pearl millet [Pennisetum americanum (L.) Leeke] or grain sorghum [Sorghum bicolor (L.) Moench] were associated with a higher MWD than oilseed radish (Raphanus sativus L. var. oleiformis Pers.). Plant tissues of Poaceae species (corn, pearl millet, and sorghum) were enriched in pentoses relative to other plant species. A principal component analysis showed a close positive relationship of the soil aggregate MWD with the soil xylose content, but not with other soil monosaccharide and SOC contents, and a positive relationship with the amount of pentose input to the soil, notably from aboveground plant materials. A possible explanation is that pentosans are used as an energy source by filamentous microorganisms, which play a well-known role in stabilizing soil aggregates. Our results suggest that plant-derived carbohydrates mediate crop species effects on soil structure under no-till conditions, and this effect appears to be independent of changes in total SOC. | |
| dc.description | Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) | |
| dc.description | Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) | |
| dc.language | eng | |
| dc.publisher | Soil Sci Soc Amer | |
| dc.relation | Soil Science Society of America Journal | |
| dc.rights | info:eu-repo/semantics/openAccess | |
| dc.title | Carbohydrate Composition and Water-Stable Aggregation of an Oxisol as Affected by Crop Sequence under No-Till | |
| dc.type | Otro | |
