Last update: September 2, 2011 02:20:33 PM E-mail Print

 

FERTILIZER REQUIREMENTS AND PRODUCTION OF ANTHEPHORA PUBESCENS NEES ON A SOIL OF THE MANGANO SERIES IN THE NORTHERN CAPE

 

J .H. FOURIE, L.G. DU PISANI

Department of Agriculture and Water Supply, Private Bag X01, Glen, 9360

and

C.H. DONALDSON

Department of Agriculture and Water Supply, Private Bag X529, Middelburg, 5900

 

 

ABSTRACT

The reaction of Anthephora pubescens to N, P and K fertilization was evaluated from 1976 to 1983. Dry matter production at N levels of 0; 75 and 150 kg/ha were 1,9; 2,2 and 2,3 ton/ha respectively. This relative poor reaction to N was related to rainfall variations and the initial low soil P status. A significant N x P interaction was recorded. Dry matter production increased from 1,6 ton/ha at the NO x PO treatment to 2,8 ton/ha at the 150 kg N/ha x 20 kg P/ha treatment. Anthephora responded poorly to K fertilization and the mean dry matter production was 2,1; 2,2 and 2,2 ton/ha with 0; 75 and 150 kg K/ha respectively.

The mean crude protein content of A. pubescens increased from 6,5 % at the NO level to 8,8 % with 150 kg N/ha. The P content of plant material increased from 0,13 % at the PO level to 0,20 % with 20 kg P/ha. The Zn content of plant material dropped to sub-optimal levels during the trial.

 

Published

Journal of the Grassland Society of Southern Africa 4 (3)