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09 October 2018 | Story UFS | Photo Eugene Seegers
Prof Johan Venter monitors an experiment during a Chemistry magic
Prof Johan Venter monitors an experiment during a ‘Chemistry magic’ demonstration at the launch of the new laboratory on the South Campus.

“This facility is proof of the belief, dedication, and willingness to create teaching and learning facilities, as well as the environment to secure successful studies for deserving students after their South Campus year, by laying a firm foundation.” These were the words of Francois Marais, Manager: Extended Curriculum Programmes, at the opening of a new Chemistry laboratory on the UFS South Campus. He added: “The culmination of this project is the result of sacrifice, hard work, and outstanding academic leadership.”

The lab came into being as a result of a pressing need for laboratory space to accommodate Chemistry students on the Bloemfontein and South campuses. Elzmarie Oosthuizen, Manager: Teaching and Learning in the faculty, discerned this need, formulated a plan, and submitted it to the Dean of the Faculty of Natural and Agricultural Sciences, Prof Danie Vermeulen. Since limited funds were available and a new building was not financially feasible, Mrs Oosthuizen suggested converting existing space on the South Campus into an appropriately equipped laboratory to relieve the additional strain on existing laboratories on the Bloemfontein Campus.

At the launch of the lab, Prof Vermeulen thanked the management and team effort of the Department of Chemistry for their enthusiasm, optimism, and positive attitude, which made it possible to establish the laboratory in a very short time.

Prof Francis Petersen, Rector and Vice-Chancellor of the University of the Free State (UFS), said: “This lab is a masterpiece of the South Campus. The University of the Free State is on a mission to improve and enhance our level of excellence in the field of academia. That is what academia is all about   to continually strive to be the best. That is why our vision is to be a research-led, student-centred, and regionally engaged institution.” He further said the value system through which this would be achieved, was development within the context of a social-justice framework.

Prof Walter Purcell, Head of the Department of Chemistry, mentioned that this new lab would bring about a 23% reduction in the number of first-year students who have to perform Chemistry practicals each week, resulting in fewer sessions being presented per week. “This has eliminated the need for evening sessions and the associated travel and safety issues for students who have to commute.”

By the launch date on 28 September 2018, 1 326 practical sessions had already been presented in the new laboratory.

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Well-established root system important for sustainable production in semi-arid grasslands
2015-02-24

Plot layout where production and root studies were done
Photo: Supplied

The importance of a well-established root system for sustainable production in the semi-arid grasslands cannot be over-emphasised.

A study of Prof Hennie Snyman from the Department of Animal and Wildlife and Grassland Sciences at the University of the Free State is of the few studies in which soil-water instead of rainfall has been used to estimate above- and below-ground production of semi-arid grasslands. “In the past, plant ecological studies have concentrated largely on above-ground parts of the grassland ecosystem with less emphasis on root growth. This study is, therefore, one of the few done on root dynamics in drier areas,” said Prof Snyman.

The longevity of grass seeds in the soil seed bank is another aspect that is being investigated at present. This information could provide guidelines in grassland restoration.

“Understanding changes in the hydrological characteristics of grassland ecosystems with degradation is essential when making grassland management decisions in arid and semi-arid areas to ensure sustainable animal production. The impact of grassland degradation on productivity, root production, root/shoot ratios, and water-use efficiency has been quantified for the semi-arid grasslands over the last 35 years. Because of the great impact of sustainable management guidelines on land users, this study will be continuing for many years,” said Prof Snyman.

Water-use efficiency (WUE) is defined as the quantity of above- and/or below-ground plant produced over a given period of time per unit of water evapotranspired. Sampling is done from grassland artificially maintained in three different grassland conditions: good, moderate, and poor.

As much as 86, 89 and 94% of the roots for grasslands in good, moderate and poor conditions respectively occur at a depth of less than 300 mm. Root mass is strongly seasonal with the most active growth taking place during March and April. Root mass appears to be greater than above-ground production for these semi-arid areas, with an increase in roots in relation to above-ground production with grassland degradation. The mean monthly root/shoot ratios for grasslands in good, moderate, and poor conditions are 1.16, 1.11, and 1.37 respectively. Grassland degradation lowered above- and below-ground plant production significantly as well as water-use efficiency. The mean WUE (root production included) was 4.79, 3.54 and 2.47 kg ha -1 mm -1 for grasslands in good, moderate, and poor conditions respectively.

These water-use efficiency observations are among the few that also include root production in their calculations.

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