Sustainable utilization of vleis
1995
Mharapara, I.M. (Department of Research and Specialist Services, Harare (Zimbabwe) Chiredzi Research Station) | Dhliwayo, H.H. (Department of Research and Specialist Services, Harare (Zimbabwe) Makoholi Research Station) | Mazhangara, E.P. (Department of Research and Specialist Services, Harare (Zimbabwe) Chiredzi Research Station)
The paper outlines the occurence and distribution of vleis in Zimbabwe. Historical and Current utilization practices of these vleis are briefly described. Potentially safe and productive systems of cultivating vleis were investigated. These included three tillage practices (ridge and furrow, flat and paddy) and three cropping patterns (monocropping, intercropping and sequential cropping). Results of crop performance are discussed for the period 1983 to 1994. During the years when both maize and rice were harvested (1984/85, 1985/86, 1987/88, 1989/90, 1992/93 and 1993/94) maize grain yield averaged 6219 kg/ha whilst that of the rice was 2129 kkg/ha. Maize yielded grain every season even those with below average rainfall. In 1991/92 seasons when Zimbabwe and indeed the sub-Saharan region experienced the worst drought in history, vlei maize on ridges averaged grain yield of 1139 g/ha. Soil fertility, ground water levels and precipitation were monitored throughout the experimental period. Implications of vlei cultivation on the socio-economic aspects were assessed in view of possible transfer. Future research and extension objectives and strategies are highlighted. The need for coordinated and multi-displinary approach on the development of vlei utilization packkages is emphasized
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