Effect of planting dates and cutting stages on the production of five selected winter cereals in Moloto District Gauteng and Nooitgedacht in Mpumulanga Province

Abstract

Due to shortage of adequate pasture in large parts of South Africa, winter survival poses a problem to farmers. A shortage in winter grazing is the major problem on most farms in South Africa. Animals loose weight in winter which leads to low reproduction, production of milk, mutton and meat. The winter feed shortages counteract also the possible good performance of animals during summer. Winter supplementation contributes largely to high input costs in livestock production, which can make this enterprise uneconomically. This study was done at two different localities: Hygrotech’s experimental farm at Dewageningsdrift, Gauteng and Nooitgedacht Agricultural Development center, Mpumalunga. Five winter fodder crop cultivars (Witteberg oats, Overberg oats, LS 35 stooling rye, LS 62 stooling rye and Cloc 1 Triticale) were planted on six planting dates (05 April, 04 May, 06 June, 20 July, 20 August and 26 September). Five cutting treatments were applied on Dewageningsdrift:  First cut 8 weeks after planting and after that re-growth every six weeks (Ct 8),  First cut 10 weeks after planting and after that re-growth every six weeks (Ct 10),  First cut 12 weeks after planting and after that re-growth cut every six weeks (Ct 12),  First cut 14 weeks after planting and after that re-growth cut every six weeks (Ct 14),  First cut when more than 50% of plants were in the reproduction stage (RS). The same cultivars that were used at Dewageningsdrift were used on Nooitgedacht ADC. Only one planting date was applied here that was 02 February 2007. The cutting treatments differed also from that on Dewageningsdrift. Material was cut for the first time when it reached a grazing stage (± 50-60 cm high) and after that re-growth was measured four weeks. The main conclusions from the study were that, Witteberg oats has retained its nutritional value longer than other cultivars. LS 35 stooling rye was an early or short duration growing cultivar, if planted in February to April it will provide grazing early/Mid-winter. However it can also be planted in July to grow in spring. LS 62 stooling rye is a medium to long duration growing cultivar which optimum production period will be in late winter and spring. Witteberg oats is a medium/late producer and a long duration growing cultivar, thus if planted early (April) it can provide grazing until late winter. Overberg oats is an early/med long duration growing type, if planted in April it will produce mid-winter, planted in May to July it will produce late winter and planted in August it will provide spring grazing. Cloc 1 triticale is a long duration growing type. It will produce late winter when planted in April to July and in spring when planted in August/September.