Influence of soil PH and fertilization on the dry matter production,chemical composition and digestibility of perennial grasses : II panicum maximum JACQ 1 |
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| Authors: | L G Du Pisani W L J Van Rensburg D P J Opperman |
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| Affiliation: | 1. Department of Agriculture and Water Supply (Free State Region) , Private Bag X01, Glen, 9360;2. Department of Pasture Science , University of the Orange Free State , P O Box 339, Bloemfontein, 9300;3. P O Box 3250, Pretoria, 0001 |
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| Abstract: | 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 × P interaction was recorded. Dry matter production increased from 1,6 ton/ha at the NO × PO treatment to 2,8 ton/ha at the 150 kg N/ha × 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. |
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| Keywords: | Phytomass soil culture |
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