The tropical legume Leucaena leucocephala (Lam.) de Wit is reviewed with respect to distribution, botanical description, cytology, climatic response, soil and nutrient requirements, establishment, management, herbage production, nutrient value, animal disorders and animal performance. The conclusion drawn is that this legume may fulfil a forage production role in South Africa.
UITTREKSELDie tropiese peulgewas Leucaena leucocephala (Lam.) de Wit word hersien met betrekking tot verspreiding, botaniese beskrywing, sitologie, klimatiese reaksie, grond-en voedingsvoorwaardes, vestiging, bestuurswese, plantmateriaalproduksie, voedingswaarde, dierekwale en diereprestasie. Die gevolgtrekking is dat die peulgewas 'n voedingsproduksie rol in dele van Suid-Afrika kan speel.
The design and implementation of studies on animal (cattle, sheep and goats) production from both improved grasslands and rangelands is reviewed. Grazing system and stocking rate terminology, planning animal production studies, development of an appropriate experimental design, duration and start date of the experiment, and extension requirements are discussed.
Grazing management of rangeland systems has not been well researched in Pakistan; grazing system the most sustainable is not known. In order to evaluate various grazing systems, a study was performed at Pabbi Hills Reserve Forest, Kharian, Punjab. Four simulated grazing treatments, viz. ungrazed control, continuous grazing, seasonal deferred grazing, and rotational deferred grazing, were tested in a randomized complete block design with four replicates. Response variables included species composition, fresh herbage yield, dry herbage yield of grasses and forbs, basal cover, and ground cover. Of the three grazing systems, the six-month seasonal deferred grazing system resulted in a marked increase in basal cover, but had no changes in relative species composition. A significant increase in grass cover and herbage production were also observed in this grazing system, suggesting that the 6-mo seasonal deferred grazing system is the most sustainable rangeland system.
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