SciELO - Scientific Electronic Library Online

SciELO - Scientific Electronic Library Online

PRESS RELEASE

WORDELL FILHO, João Américo  y  SPAGNOLLO, Evandro. Sistema de cultivo e doses de nitrogênio na sanidade e no rendimento do milho. Cienc. Rural [online]. 2013, vol.43, n.2, pp. 199-205. ISSN 0103-8478.  http://dx.doi.org/10.1590/S0103-84782013000200002.



 

Maize plant yield is lower in monoculture

 

 

Researchers from Empresa de Pesquisa Agropecuária e Extensão Rural, of Santa Catarina, Brazil, found that the base of the stalk rot of corn have higher incidence in monoculture. The research was published in Ciência Rural , v.43, Issue 2, of February 2013.

The study quantified the effects of corn monoculture, crop rotation with bean and nitrogen fertilization on the incidence of PBC and GA, the levels of fumonisins, thousand seed weight (PMS) and grain yield of maize. For this, the researchers used a randomized block design with split plots and four replicates per treatment. In the main plot, three maize hybrids were tested: P30F36, AS 1575 and Maximus. Subplots, the researchers assessed the answer of hybrids to five levels of nitrogen, equivalents at 0, 75, 140, 215 and 290kg N ha-1 in both cropping systems.

The study quantified the effects of corn monoculture, crop rotation with bean and nitrogen fertilization on the incidence of PBC and GA, the levels of fumonisins, thousand seed weight (PMS) and grain yield of maize. For this, the researchers used a randomized block design with split plots and four replicates per treatment. In the main plot, three maize hybrids were tested: P30F36, AS 1575 and Maximus. Subplots, the researchers assessed the answer of hybrids to five levels of nitrogen, equivalents at 0, 75, 140, 215 and 290kg N ha-1 in both cropping systems.

The study breaks new ground by showing that the levels of mycotoxins are not influenced by cropping systems, which had not been shown by any study area. According to researcher John Américo Wordell Filho, the survey still showed no relationship between the presence of the pathogen with the production of mycotoxins.

In practice, the results may be used as input for crop rotation system in maize cultivation, since the yield in the cropping system of rotation is higher compared to the system in monoculture.

 

 

Researcher:
João Américo Wordell Filho and Evandro Spagnollo
E-mail:wordell@epagri.sc.gov.br
e spagnollo@epagri.sc.gov.br