Efeito do inibidor de nitrificação «AM» em alguns solos do estado de São Paulo

Effect of the nitrification inhibitor "AM" in some soils of São Paulo state

Efeito do inibidor de nitrificação «AM» em alguns solos do estado de São Paulo^*

Effect of the nitrification inhibitor "AM" in some soils of São Paulo state

A. M. L. Neptune^I; S. M. Tsai Saito^II

^IDepartamento de Solos e Geologia e Divisão de Ciências do Solo do CENA ESALQ, USP

^IIPesquisadora do Centro de Energia Nuclear na Agricultura (CENA), ESALQ USP

RESUMO

Utilizou-se o inibidor de nitrificação "AM" em quatro solos diferentes do Estado de São Paulo, a fim de se determinar a dose efetiva de inibição da nitrificação em cada solo. As doses usadas (0,12, 24, 36, 48 e 60 ppm) de "AM" não foram suficientes para atuarem significativamente no Latossol Roxo e no Podzolizado de Lins e Miarília, var. Marília; porém resultados positivos foram obtidos com os solos Podzolizado de Piracicaba e Regossol Intergrade, para os quais,, doses de 24 a 60 ppm foram suficientes para atuarem por um período de 60 dias.

SUMMARY

The nitrification inhibitor "AM" was tested in four different soils of São Paulo State, in order to determine the effective dose for nitrification inhibition for each soil. The doses of "AM" used (0, 12, 24, 36, 48 and 60 ppm) were not sufficient to act significantly in the Latossol Roxo and Podzolizado of Lins and Marília, var. Marilia soils; however, positive results were obtained in the Podzolizado of Piracicaba and Regossol Intergrade soils. For the first soil, doses of 48 to 60 ppm were sufficient to act for a period of 60 days and for the second, the "AM" was effective with 24 ppm. for a same period of time.

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LITERATURA CITADA

Entregue para publicação em 30.12.76.

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*

Trabalho realizado em parte com o auxílio da Comissão Nacional de Energia Nuclear.

Datas de Publicação

• Publicação nesta coleção
  29 Maio 2012
• Data do Fascículo
  1976

Histórico

• Recebido
  30 Dez 1976