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• W284763631 abstract "Maintenance of legume populations in pastures is important for both animal and grass production. Population studies facilitate understanding of the modes of persistence of legumes in pastures. The population dynamics of Desmodium intortum cv Greenleaf, Macroptilium atropurpureum cv Siratro, Macrotyloma axillare cv Archer, Stylosanthes guianensis var guianensis cv Graham and Trifolium semipilosum cv Safari in permanent quadrats were studied. The legumes were grown in association with two different grass species. The trial was conducted at Mt. Cotton Research Station. The grass species used were stoloniferous Brachiaria decumbens cv Basilisk and the erect Paspalum plicatulum cv Rodds Bay. Three stocking rates 1.5,2.0 and 3.3 beats ha-1 were used to examine the influence of grazing on the population dynamics. The report discusses the results after one year of continuous grazing. No differences were observed between grass species in dry matter yield and the spatial distribution of dry matter within the canopy. The main differences in dry matter are attributed to defoliation intensity as a consequence of grazing intensity. For this reason differences in legume populations cannot be directly attributed to to the growth habit of the companion grass species. Over 50% of D.intortum survived the first year of grazing in the 1.5 and 2.0 beasts ha_1 treatments and plants that arose from stolons were observed in the 1.5 beasts ha_1 treatments. Plant longevity was lower in the 3.3 beats ha_1 treatments. M. atropurpureum and M. axillare populations declined following the cold winter and as a consequence of increased grazing pressure. Vegetative propagation of M. atropurpureum was observed. S. guianensis is a short lived perennial. The decline in S. guianensis appeared to be a result of the cold winter and not grazing pressure because the mortality rate was similar for all three stocking rates. T. semipilosum populations persisted through stolon production. The established plants died 6 months after grazing started.  T. semipilosum populations appeared to depend on available moisture. The importance of seedling regeneration Is considered to be minor.   Seedling populations declined with increasing stocking rate for D.intortum, M. atropurpureum, M. axillare and S. guianensis. However, seedling survival increased with increasing stocking rate. Mortality rate of S. guianensis was lower compared to the other legumes. Density declined with increasing stocking rate.  The importance of tropical legumes in a sub-tropical environment is discussed and possible management strategies are also examined. T. semipilosum appears to be better adapted to the area compared to the other legumes." @default.
• W284763631 created "2016-06-24" @default.
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• W284763631 date "1983-01-01" @default.
• W284763631 modified "2023-09-27" @default.
• W284763631 title "Population dynamics of five legumes in two grass/legume pastures under cattle grazing" @default.
• W284763631 hasPublicationYear "1983" @default.
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