|The Water Buffalo: New Prospects For An Underutilized Animal (1984) |
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Most buffaloes are located in countries where land, cultivated forage crops, and pastures are limited. Livestock must feed on poor-quality forages, sometimes supplemented with a little green fodder or byproducts from food, grain, and oil seed processing. Usually feedstuffs are in such short supply that few animals have a balanced diet, but the buffalo seems to perform fairly well under such adverse conditions.
Insufficient measurements have been taken to allow unequivocal state. meets about the relative growth rates of cattle and buffaloes. However, many observations made in various parts of the world indicate that the buffalo's growth is seldom inferior to that of cattle breeds found in the same environments. Some observations are given below.
· Trials in Trinidad in the early 1960s involved buffaloes grazing pangola grass (Digitaria decumbens) together with Brahman and Jamaican Red cattle. Over a period of 20 months the buffaloes gained an average of 0.72 kg per day, whereas the cattle on a comparable nearby pasture gained 0.63 per day(Experiments performed by P. N. Wilson. -Information supplied by S. P. Bennett.).
· In the Orinoco Delta of Venezuela unselected Criollo/Zebu crossbred cattle gained 0-0.2 kg per day on Paspalum fasciculatum, whereas the water buffaloes with them gained 0.25-0.4 kg per day(Cunha et al., 1975).
· In the Apure Valley of Venezuela, 100 buffalo steers studied in 1979 reached an average weight of 508 kg in 30 months, whereas the 30-month old Zebu steers tested with them weighed 320 kg. The feed consumed was a blend of native grasses (25 percent of the diet) and improved grasses (such as pangola, pare, and guinea grass)( Information supplied by A. Ferrer). In the same valley 200 buffalo heifers (air freighted from Australia) produced weight gains averaging 0.5 kg per day over a 2-year period (and 72 percent of them calved). Government statistics for the area record average weight gains in crossbreeds between Zebu and Criollo cattle as 0.28 kg per day (with 40 percent calving).
· In the Philippines, buffaloes showed weight gains of 0.75-1.25 kg per day, the same as those of cattle.
· Daily weight gains of over 1 kg have been recorded for buffaloes in Bulgaria and Yugoslavia.
· Liveweight gains of 0.80 kg per day have been recorded for buffaloes in Papua New Guinea. In a very humid, swampy area of the Sepik River coastal plains liveweight gains by males averaged 0.47 kg per day and females 0.43 kg per day for more than a year. The average weight of 30 4-year-old female buffaloes was 375 kg, while the average weight of 4-year-old female Brahman/ Shorthorn crossbred cattle was 320 kg.
· At the research station near Belem in the Brazilian Amazon weaned Murrah buffaloes, pastured continuously on Echinochloa pyramidalis (a nutritious grass), gained 0.8 kg daily and reached 450 kg in about 18 months.
· Liveweight gains of 0.74-l.i kg per day have been obtained in Australia. Buffalo steers grew as fast or faster than crossbred Brahman cattle on several improved pastures near Darwin, but on one very poor pasture, 40-year-old buffaloes each weighed only 400 kg, whereas the Brahman crossbred steers reared with them weighed 500 kg. The reason for this is not clear.
Efficiency of Digestion
Indian animal nutritionists have investigated water buffaloes intensively over the past two decades. Many have reported that buffaloes digest feeds more efficiently than do cattle, particularly when feeds are of poor quality and are high in cellulose.One trial revealed that the digestibility of wheat straw cellulose was 24.3 percent for cattle and 30.7 percent for buffalo. The figures for berseem (Trifolium alexandrinum) cellulose were 34.6 percent for cattle and 52.2 percent for buffalo. In another trial the digestion of straw fiber was 64.7 percent in cattle, 79.8 percent in buffalo.
Other nutrients reported to be more highly digested in buffaloes than in cattle (Zebu) are crude fat, calcium and phosphorus, and nonprotein nitrogen.
Recent experiments in India suggest that buffaloes also are able to utilize nitrogen more efficiently than cattle. Buffaloes digested less crude protein than cattle in one trial but increased their body nitrogen more (and they were being fed only 40 percent of the recommended daily intake of crude protein).
The ability of buffaloes to digest fiber efficiently may be partly due to the microorganisms in their rumen. Several Indian research teams have published data indicating that the microbes in the buffalo rumen convert feed into energy more efficiently than do those in cattle (as measured by the rate of production of volatile fatty acids in the rumen).
Also, in laboratory studies samples of buffalo rumen contents produced volatile fatty acids more quickly from a variety of animal feedstuffs than did samples from the rumen of cattle
No single reason alone explains the buffalo's success in using poor quality forages. Rather, it is a combination of reasons that differ with the breed and conditions used. Studies by other researchers suggest that additional causes might include:
· Higher dry matter intake;
· Longer retention of feed in digestive tract;
· Ruminal characteristics more favorable to ammonia-nitrogen utilization;
· Less depression of cellulose digestion by soluble carbohydrates (e.g., starch or molasses);
· Superior ability to handle stressful environment; and
· A wider range of grazing preferences.
Calf Growth Rates
Although the buffalo's gestation period is more than a month longer than that of cattle, the calves are born weighing 35-40 kg, or about the same as that of a newborn Holstein calf. But because buffalo milk has about twice the butterfat of cow's milk, the calves grow very quickly. They also suffer more shock at weaning and have to be slowly changed to their new feeding program. Buffaloes can be marketed as full-grown animals for beef at the age of 2-3 years, sometimes even earlier.
For example, in Indonesia it has been found that buffalo steers can be marketed 6 months before Zebu steers because they may be 100 kg heavier. In Egypt some buffalo calves given feed supplemented with concentrates weighed 360 kg at 1 year of age. At Ain Shams University near Cairo, buffalo calves weaned at 7-14 days of age gained 0.7 kg per day from weaning to slaughter at 18 months of age and weighed 400 kg. Rice straw comprised 50 percent of the finishing diet.
Buffaloes on Italian farms have reached 350 kg in 15-18 months and some year-old calves weighed 320 kg.
Grazing trials on native pasture (with mineral supplementation) in the Brazilian Amazon indicate that buffalo calves grew faster than cattle. At 2 years of age Mediterranean-type buffaloes averaged 369 kg, Swamp type, 322 kg, and Jafarabadi type, 308 kg. The Zebu cattle tested with them averaged 265 kg and the crossbred Zebu/Charolais, 282 kg.
Buffaloes graze a wider range of plants than cattle. During floods near Manaus in the Brazilian Amazon when cattle become marooned on small patches of high ground, many suffer from foot rot and many starve to death. Their buffalo companions on the other hand-bodies sleek and full-swim out to islands of floating aquatic plants and eat them, treading water. Also, they dive almost 2 m to graze beneath the floodwaters.
University of Florida buffaloes in a lakefront voluntarily consumed vines, sedges, rushes, floating aquatic weeds, and the leaves and shoots of willows and other trees along the water's edge. Few of these plants are voluntarily grazed by cattle. In northern Australia water buffaloes graze the very pickily leaves of pandanus; they also graze sedges, reeds, floating grass, and aquatic weeds. Hungry buffaloes will eat bark, twigs, and other unpalatable vegetation.
Because of the variety of their tastes they have been used in northern Queensland, Australia, to clear pastures of woody weeds left untouched by cattle. In some countries cattle are used to graze the palatable tops of pasture plants and are followed by buffaloes to graze the less desirable lower parts.
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