Uso de Leguminosas como Fonte de Nitrogênio para o Cultivo de Alface em Solo de Várzea da Amazônia Central

Content Provider	Semantic Scholar
Author	Costa, Marta
Copyright Year	2009
Abstract	Although soils of the Amazon floodplain soil have high natural fertility, nitrogen is the limiting factor for agriculture. This study evaluated nitrogen release from chopped leaves of four native legumes species used as green manure prior to lettuce production, on varzea soils in Manacapuru, Amazonas. The experiment was laid out in the field as totally randomized blocks with 5 treatments, with four repetitions each: varzea soils with Erythrina fusca (1), with Canavalia boliviana (2), Rhynchosia minima (3), Mimosa pigra (4) and floodplain soils only as control. In a shadehouse, pots containing soil mixed with the same legumes were incubated at ambient temperature and kept moist at 80% of field capacity during 0, 15, 30, 45 e 60 days. A totally randomized blocks experimental design was also used, with 5 treatments and four repetitions each. Although the results were not significantly different, lettuce production was higher with E. fusca and M. pigra. The mineralization of N was predominantly in the ammonium form up until 15 days, and then in the nitric form. Both field and pot experiments indicated that E. fusca has greater potential as a nitrogen source to improve lettuce production in floodplain soils.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://revistas.aba-agroecologia.org.br/index.php/cad/article/download/4844/3573
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article