Evaluation of rangeland condition in miombo woodlands in eastern Tanzania in relation to season and distance from settlements.

Miombo woodlands sustainability in east and south-central Africa is threatened by human activities, including overgrazing. This study investigated seasonal variations in rangeland condition in three grazed areas in miombo woodlands in eastern Tanzania. Transect lines were established across the grazing areas, sampling points were identified and marked at every 10% of the length of transect line. Sampling points were categorised in different distances with respect to settlement. The line intercept method was used to collect data on vegetation cover and forage distribution, while herbaceous forage biomass was estimated using a disc pasture meter. A total of 118 different plant species were observed and grasses comprised 40.6% of all herbaceous species. Bothriochloa pertusa, Cynodon plectostachyus, Hyparrhenia rufa and Urochloa mosambicensis grass species dominated miombo grazed areas in various seasons and distances. These perennial grass species are desirable and indicated moderate grazing activities in miombo. Season affected grass cover, herbaceous forage biomass and nutritional composition. Grass cover and forage biomass were at the lowest during late dry season while forage nutritional quality was best during early dry season. Distance from settlement had no effect on grass cover and herbaceous forage biomass. Rangeland condition was generally fair, livestock stocking rate in continuously grazed drylands should be set at the lowest monthly forage biomass in order to ensure grazing land sustainability.

Indigenous knowledge and rangelands' biodiversity conservation in Tanzania: success and failure.

Tanzania is one of the African countries endowed with diverse rangeland's biological resources hosting 6 out of 25 globally known biodiversity hotspots. Despite, government efforts on biodiversity conservation, the pressures on rangelands' biodiversity utilization are growing in line with increasing human population. With little recognition of contribution of local knowledge in biodiversity conservation, the current paper reviewed the potential of available indigenous knowledge in Tanzania and challenges limiting adoption of this vital knowledge on rangeland's biodiversity conservation. This review established that, the country has rich indigenous knowledge potential for rangeland management and biodiversity conservation. Traditional enclosures and pastoral mobility are among the important indigenous practices used for rehabilitation of degraded rangelands and conservation of fragile ecosystems. The coexistence of local communities with complex ecosystems offers them excellent experiences on rangelands' biodiversity conservation. However, increasingly loss of rangelands' biodiversity in the country is attributed to ignoring the contribution of local communities which are rich in indigenous knowledge and skills on rangelands management. Among of the challenges hindering the adoption and involvement of indigenous knowledge to conservation are; scientific bias toward pastoral communities, loss of local expertise, poor knowledge inheritance systems, poverty, conflicts and emergence of pandemic diseases. For effective and sustainable utilisation of indigenous knowledge, the following are recommended; fully engagement of local communities in conservation process, empowering local communities to reduce poverty and conflicts, mainstreaming the indigenous knowledge to conservation education, emphasising on livelihoods diversification to reduce reliance on biological resources and promoting studies to document existing indigenous knowledge.

The effects of concentrate supplementation on growth performance and behavioral activities of cattle grazed on natural pasture.

The study was conducted in Manyara Region, to determine the effect of concentrate supplementation on growth performance and foraging behavior of zebu steers. Twenty zebu steers were distributed equally into two dietary groups: pasture + concentrate (PS) and natural pasture alone (NP). The animals' body weight and body condition scores were estimated every 2 weeks. The focal observation technique was used to determine grazing behavior. The average daily gain (ADG) was significantly higher (P ≤ 0.05) in the PS than in the NP. Significant less time (P ≤ 0.05) was spent in feeding by animals in the PS than those in the NP. Significant less bite rates (P ≤ 0.05) were also observed in the PS than in the NP. The most highly abundant forage species exhibited low CP contents but were most frequently eaten by the focal animals. Strategic supplementation with locally available concentrates is recommended for profitable ruminant productivity and environmentally friendly grazing strategy.