- Fertilizer requirement and production of Anthephora Pubescens rees on soil of mangano series in the Northern Cape
|Last update: September 2, 2011 02:20:33 PM|
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
Department of Agriculture and Water Supply, Private Bag X529, Middelburg, 5900
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.
Journal of the Grassland Society of Southern Africa 4 (3)