Full TGIF Record # 4568
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Author(s):Gil, F.; Caballero, A.; Guadilla, D.
Author Affiliation:Departamento de Fisiologia Vegetal, Universidad de Barcelona, Barcelona, Spain
Title:Accion diferencial del nitrato y del amonio en la produccion de Lolium perenne cultivado en prado artificial de siega continua
Translated Title:Differential effects of nitrate and ammonium on the production of repeatedly cut artificial swards of Lolium perenne
Source:Anales de Edafologia y Agrobiologia. Vol. 38, No. 3/4, 1979, p. 643-665.
Publishing Information:Madrid
Keywords:TIC Keywords: Lolium perenne; Fertilizers; Growth; Seasonal variation; Nitrogen; Ammonium; Nitrates
Abstract/Contents:In field trials in 1976 at 2 sites in the Pedralbes area NW of Barcelona, irrigated swards of perennial ryegrass were given 0, 250, 500 kg or 1 t N/ha as nitrate-N or ammonium-N and harvested weekly. The highest fertilizer levels were not sufficient to reach saturation growth response, probably due to the intensive irrigation and subsequent losses of N by leaching and denitrification. Growth rate (g/m2 21 days) reached a peak in the spring (April-May) and a 2nd smaller peak in the autumn (Sept.-Oct.) and increased with increase in N rate (more marked in the spring than in the autumn) and was equal or greater with ammonium-N at the higher N rate and with nitrate at the lower N rates. Equations relating fertilizer rates and dry and fresh wt. are presented.
Language:Spanish
References:41
Note:Summary appears in English
Geographic Terms:Spain
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Gil, F., A. Caballero, and D. Guadilla. 1979. Accion diferencial del nitrato y del amonio en la produccion de Lolium perenne cultivado en prado artificial de siega continua. (In Spanish) Anales de Edafologia y Agrobiologia. 38(3/4):p. 643-665.
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