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Original Articles

Die invloed van winterbrand en sny op die seisoenshooiproduksie van eragrostis curvula (schrad) nees

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Pages 117-122 | Published online: 08 Nov 2010
 

Uittreksel

Deur middel van ‘n 33 faktoriale proef is die invloed van drie metodes van ontblaring (jaarliks sny, jaarliks brand, en sny en brand jaarliks afgewissel), gedurende drie verskillende tye (Julie, Augustus en September) op bemeste (O N + P; 53 kg N/ha + 16 kg P/ha; en 106 kg N/ha + 32 kg P/ha) Eragrostis curvula cv. Ermelo vir ‘n tydperk van ses jaar bestudeer.

Elke bemestingsinkrement het ‘n toename (P < 0,01) in DM‐opbrengs, stikstof‐en veselpersentasie ruprotéien‐en vesel‐produksie per ba veroorsaak. Die tyd van ontblaring het egter geen invloed op enige van hierdie maat‐stawwe gehad nie. Behandelings wat jaarliks gesny is, het meer (P < 0,01) droëmateriaal geproduseer as persele wal jaarliks gebrand is of waar brand jaarliks met sny afgewissel is. Laasgenoemde behandeling het weer beter (P <0,01) opbrengste gelewer as persele wat jaarliks gebrand is.

Abstract

The response of Eragrostis curvula cv. Ermelo to three levels of fertilizer (no N or P; 53 kg N + 16 kg P per ha; and 106 kg N + 32 kg P per ha), three times of removing unutilized herbage (July, August and September) and three methods of herbage removal (annual mowing, annual burning and burning and mowing in alternate years) was measured over six years in a 33 factorial experiment.

Each increment of fertilizer produced an increase (P < 0,01) in DM yield, nitrogen and fibre percentage and crude protein and fibre production per ha. But time of defoliation had no effect on any of these variables. Plots cut annually produced more dry matter (P < 0,01) than those burnt annually or those subjected to alternate burning and mowing. The last treatment gave better yields (P < 0,01) than annual burning.

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