พืชร่วงโรยตั้งแต่ the wilted plants ranged from 42- –57%, 57%, the in vitro digestibility
55.0from 55.0-58.0% and the estimated metabolizable
ประมาณความเข้มข้น8.5 energy concentration from 8.5- -9.0 MJ / kg DM 9.0 MJ/kg DM. Juárez
Reyes et al. (2009) reported higher in vitro gas production
(P < 0.05) for pangola grass, compared with 30% less gas
in other grasses (Guinea, Bermuda and Tanzania grasses).
They also reported greater (P < 0.05) in vitro gas production
and insoluble but slowly degradable (b) fraction of
pangola grass, as well as lower b fraction in Guinea and
Bermuda grasses.
Although a reasonable number of in vivo studies have
been published, they vary largely in terms of animal species
or category within species, research methods and,
even more important, response variables studied. This
extreme heterogeneity, which left only few and sometimes
one single number for a given variable related to
the nutritive value of pangola, precluded a quantitative
analysis of data. It became obvious that more systematic
and comparative studies are needed before this goal can
be achieved.
Lee et al. (1991) indicated that the digestibility of DM
and DM constituents and hence the energy value of pangola
and Napier grasses were higher at the earlier stages
of growth and decreased as the plant approached maturity.
More specifically, Archimède et al. (2000) reported
that OM digestibility decreased curvilinearly with age.
Seventy-one percent of the total decrease occurred between
14 and 28 days with the corresponding values for
neutral detergent fibre and acid detergent fibre of 75
and 69%. More recent studies on in vivo digestibility of
pangola fed in different forms are summarized in Table 2.
This data again suggest a considerable variation even for
pangola harvested after similar or the same length of the
growth period but, as already stated for chemical
composition, data do not allow to clearly identifying the
reason for this variation. Panjaitan et al. (2010) fed Spear
and Mitchell grass hays (low quality tropical forage) to
steers and observed lower microbial CP (MCP) production
(80 and 170 g MCP/day, respectively) and efficiency
of MCP production (78 and 79 g MCP/kg digestible organic
matter (DOM), respectively) than when steers
were fed pangola grass (328 g MCP/day; 102 g MCP/kg
DOM) and ryegrass (627 g MCP/day; 135 g MCP/kg
DOM) hays, which was directly related to the supply of
DOM and rumen-degradable CP.
Some authors studied effects of pangola on growth of
ruminants. In Taiwan, Hsieh (1990) used four tropical
grasses (pangola, Guinea, dwarf elephant and South
African pigeon grass) which were grazed by seven Holstein
steers during the first year and 60 Nubian-native goat hybrids
during the second year. Pangola gave the highest
average daily gain (ADG) for cattle, while Guinea grass was
the second highest. At Parada in North Queensland,
Australia, a body weight gain of 2,990 kg/(ha × year) was
obtained from grazing irrigated pangola grass fertilized
with 672 kg N/(ha × year); (Ebersohn and Lee 1972). In
Jamaica, Creek and Nestel (1965) found that pangola
grazed at 32-day intervals produced more DM and more
body weight gain than when grazed at 40-day intervals.
In Thailand, the quality of beef from cattle fed with pangola
in terms of chemical composition, collagen content,
cholesterol, triglyceride and water holding capacity showed
different values between White Lamphun and Brahman
crossbred cattle (Chaiwang et al. 2011). However, pangola
can be used for rearing native cattle and could be an alternative
feed for farmers. Moreover, Tuikampee et al. (2006)
reported that the average milk yield of cows fed pangola
grass-based diets was approximately 16 kg/day; the milk
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