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Original Articles

Seasonal response of eragrostis curvula to nitrogen seisoenale reaksie van eragrostis curvula opstikstof

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Pages 91-94 | Published online: 08 Nov 2010
 

Abstract

On the basis of the seasonal response of Eragrostis curvula to nitrogen applied as single dressings to separate plots at the beginning of each of the six rnontlis of the growing season, it is deduced that nitrogen can profitably be applied in the Ukulinga environment from early spring through to early January. Late summer and autumn applied nitrogen is inefficiently used by the pasture. Where autumn growth is required for late grazing, this can best be produced from the residual nitrogen of mid‐summer nitrogen dressings.

Urea and limestone ammonium nitrate proved equally effective as carriers of nitrogen for E. curvula.

Uittreksel

Op grond van seisoenale reaksie van Eragrostis curvula op stikstof wat op die eerste dag van elkeen van die ses maande (Okt. — Maart) van die groeisekoen aan die betrokke E. curvula persele toegedien is, word tot die gevolgtrekking geraak dat in die Ukulinga‐gebied word stikslof met die grootste voordeel vanaf vroeë‐lente tot vroeë‐Januarie op hierdie gras toegedien. Stikstof wat in laat‐somer en herfs toegedien word, word ondoeltreffend benut. Waar herfsgroei vir laatweiding benodig word, word dit die voordeligste deur residuele stikstof van mid‐somer stikstof‐toedienings, verkry. Urea en kalksteen ammonium nitraat blyk ewe effektief as draers van stikstof vir E. curvula te wees.

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