TY  - JOUR
T1  - Assessment of Nutritive Value of Four Dominant Weed Species in Range of Khorasan Distict of Iran by <I>in vitro</I> and <I>in situ </I>Techniques
AU - Kazemi, M. AU - Tahmasbi, A.M. AU - Valizadeh, R. AU - Naserian, A.A. AU - Moheghi, M.M. 
JO  - Journal of Animal and Veterinary Advances
VL  - 8
IS  - 11
SP  - 2286
EP  - 2290
PY  - 2009
DA  - 2001/08/19
SN  - 1680-5593
DO  - javaa.2009.2286.2290
UR  - https://makhillpublications.co/view-article.php?doi=javaa.2009.2286.2290
KW  - Gas production
KW  -in vitro
KW  -in situ
KW  -degradable
KW  -weed forage
KW  -incubation
AB  - <I>In vitro</I> gas production and <I>in situ</I> techniques were used to evaluate nutritional value of some alternative weed forages e.g., <I>Sorghum halepense</I>, <I>Salsola kali</I>, <I>Convolvulus arvensis</I> and <I>Portulaca oleracea</I>. Cumulative gas production was recorded at 2, 4, 8, 12, 24, 48, 72, 96 and 120 h of incubation also, <I>in situ</I> disappear of dry matter for these weed forage was measured at 0, 2, 4, 8, 16, 24, 48, 72 and 96 h of incubation and gas production constants (b and c) were described using the equation y = b (1-e<SUP>-ct</SUP>). The most cumulative gas production was for <I>Sorghum halepense</I> in time of 120 h incubation (116.67 mL/300 mg of sample incubated) and <I>Portulaca oleracea</I> was the lowest cumulative gas production for 120 h incubation (66.35 mL/300 mg of sample incubated). The NDF, OM, Pr and DM were different among weed forages used in this study. The equation of y = a+b (1-e<SUP>-ct</SUP>) was applied for degradability of DM. The constant (readily soluble fraction, 53.53%) of <I>Convolvulus arvensis</I> was higher but, the constant of <I>Salsola kali</I> was lowest (45.82%). The b constant (insoluble fraction but degradable in rumen) for <I>Sorghum halepense</I> (44.48%) was significantly higher than other treatments and the c constant (rate of degradation of b per hour) was significantly higher for <I>Portulaca oleracea</I> (0.089%). According to results from gas production and <I>in situ</I> techniques, it seems that the <I>Sorghum halepense</I> has a higher nutritive value than other treatments, but more experiments were required for accurate determination of nutritional values of these forages.
ER  -