SciELO - Scientific Electronic Library Online

 
vol.35 número2Atributos microbianos do solo após a adição de lodo anaeróbio da estação de tratamento de efluentes de parboilização do arrozAdubação NPK no crescimento inicial de mudas de pinhão-manso em Neossolo Quartzarênico índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Artigo

Indicadores

Links relacionados

  • Não possue artigos similaresSimilares em SciELO

Compartilhar


Revista Brasileira de Ciência do Solo

versão impressa ISSN 0100-0683

Resumo

OLIVEIRA, Fabio Freire de; SALCEDO, Ignacio Hernan  e  FRAGA, Vânia da Silva. Fertilization efficiency of potato with farm manure plus fertilizer-N (15N) and residual effect on millet. Rev. Bras. Ciênc. Solo [online]. 2011, vol.35, n.2, pp. 551-557. ISSN 0100-0683.  http://dx.doi.org/10.1590/S0100-06832011000200024.

The N content of the sandy soils in the semi-arid region of Paraíba State cultivated with potato (Solanum tuberosum) is low. Annual applications of farm manure (FM) and mineral N, determined on an empirical basis, have led to accumulation and/or loss of soil nutrients. Thus, the objective of this study was to determine the efficiency of ammonium sulphate (15N) combined with FM applied to potato as well as the residual effects on subsequent millet. A field experiment on an Alfisol compared the combination of a rate of 16 t ha-1 FM + 80 kg ha-1 of mineral N, as most frequently used in the region, with a rate of 11 t ha-1 of FM combined with 0, 40 and 80 kg ha-1 of N in single or split applications. The ammonium sulphate was enriched in 15N (2.5 % 15N abundance). The dry weight of potato and millet aboveground mass was determined in all treatments, as well as the N isotopic composition of both materials. Fertilization at the traditional rate proved to be excessive for this soil, since crop yields were not reduced when the rates were reduced to 11 t ha-1 manure + 40 kg ha-1 mineral N. However, yields were lower with applications of manure alone. Millet recovered much of the mineral N added to potato and was a good alternative for forage production in the area.

Palavras-chave : subsistence agriculture; Solanum tuberosum; organic amendments.

        · resumo em Português     · texto em Português     · pdf em Português