Quantitative field evaluation of Malaysian-made formaldehyde treated granular urea for Nicotiana tabacum L. using 15 N isotope aided technique

Tham K.C., . Quantitative field evaluation of Malaysian-made formaldehyde treated granular urea for Nicotiana tabacum L. using 15 N isotope aided technique. pp. 246-251. ISSN 0128-0686

The response by tobacco to formaldehyde treated granular urea and NH4NO3 were compared under traditional management for two seasons (Rusila soil series) and regularly sprinkler irrigated (Rhu Tapai soil series) conditions using 15N isotope labelling technique. Treatments receiving granular urea consistently had higher N yield and lower percentage 15N atom excess - indicating a higher efficiency than treatment receiving NH4NO3 although these were not significant (p 0.05) at any one location. None of the commercial N fertilizer sources tested had any significant effect on dry matter yield. In terms of efficiency expressed in equivalent standard 15N fertilizer units granular urea consistently supplied higher amounts of plant available N than did NH4NO3. The effects were however significant (p 0.05) only at Bachok in 1986 where LGU and SGU supplied approximately 1.3 times more plant available N than did NH4NO3. Uptake of commercial N fertilizer sources as measured in the plant tops was highest with LGU and lowest with NH4NO3 under both management conditions although these differences were not significant (p 0.05). None of the commercial N fertilizer sources had any significant effect on the crop index grade index or the percentage non-descript of the flue-cured tobacco at Rantau Abang Kelantan Peninsular Malaysia.

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Abstract

The response by tobacco to formaldehyde treated granular urea and NH4NO3 were compared under traditional management for two seasons (Rusila soil series) and regularly sprinkler irrigated (Rhu Tapai soil series) conditions using 15N isotope labelling technique. Treatments receiving granular urea consistently had higher N yield and lower percentage 15N atom excess - indicating a higher efficiency than treatment receiving NH4NO3 although these were not significant (p 0.05) at any one location. None of the commercial N fertilizer sources tested had any significant effect on dry matter yield. In terms of efficiency expressed in equivalent standard 15N fertilizer units granular urea consistently supplied higher amounts of plant available N than did NH4NO3. The effects were however significant (p 0.05) only at Bachok in 1986 where LGU and SGU supplied approximately 1.3 times more plant available N than did NH4NO3. Uptake of commercial N fertilizer sources as measured in the plant tops was highest with LGU and lowest with NH4NO3 under both management conditions although these differences were not significant (p 0.05). None of the commercial N fertilizer sources had any significant effect on the crop index grade index or the percentage non-descript of the flue-cured tobacco at Rantau Abang Kelantan Peninsular Malaysia.

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Item Type:	Article
Additional Information:	4 tables; 14 ref. Summary (En Ms)
AGROVOC Term:	NICOTIANA TABACUM
AGROVOC Term:	UREA
AGROVOC Term:	NITRATO DE AMONIO
AGROVOC Term:	FORMALDEHIDOS/ TECNICAS DE TRAZADORES
AGROVOC Term:	ABSORCION DE SUBSTANCIAS NUTRITIVAS
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:56
URI:	http://webagris.upm.edu.my/id/eprint/20257

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