Nutritive Value of Damp Rice Straw and its Feeding Effect on Aflatoxin Transmission into Cows Milk
Nutritive Value of Damp Rice Straw and its Feeding Effect on Aflatoxin Transmission into Cows Milk
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湿稻草的营养价值及其对黄曲霉毒素向牛奶传播的饲喂作用
DOI：
10.3923/pjn.2003.153.158
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
.. M.E.Hossain
中科院分区：
文献类型：
--
作者：
.. A.Bhuiyan;.. M.A.Akbar;.. M.E.Hossain
本试验测定了不同发酵水平的稻草的营养价值，并检测了霉菌毒素的污染程度及其在牛奶中的传播情况。从选定的地区收集稻草，根据发酵程度，即高发酵，低发酵和未发酵的稻草。同样，从同一地区饲喂稻草的奶牛中收集牛奶样本。结果表明，不同发酵水平对干物质、粗纤维和非挥发性有机物的影响差异显著（P0.05）.高发酵秸秆DM有效降解率显著低于未发酵秸秆（19.26%比13.03%）（P<0.05）。但高度发酵秸秆的CP有效降解率显著高于未发酵秸秆（17.10vs.10.83%）（P<0. 05）。发酵和未发酵的稻草的化学分析没有显示可检测到黄曲霉毒素的水平。然而，从某些地区收集的牛奶样本显示一定水平的黄曲霉毒素M（0.001微克/千克1至0.006微克/千克）。结果表明，稻草受潮发酵降低了其可溶性营养物质的体外消化率和DM的原位降解率，但提高了CP的有效降解率。腐殖酸还导致发酵秸秆中的黄曲霉毒素M以低水平传播到牛奶中。
The experiment was carried out to determine the nutritive value of different level of fermented rice straw as well as to detect the level of mycotoxin contamination and its transmission into cow's milk. Rice straw was collected from selected area based on degree of fermentation i.e. high fermented, low fermented and unfermented rice straw. Similarly, milk samples were collected from cows fed rice straw of the same area. Results showed that, DM, CF and NFE were significantly (P 0.05) irrespective of level of fermentation. The effective degradability of DM for high fermented straw was significantly (P<0.05) lower than unfermented straw (13.03 vs. 19.26%). However, the effective degradability of CP of high fermented straw was significantly (P<0.05) higher than unfermented straw (17.10 vs. 10.83%). Chemical analysis of fermented and unfermented rice straw did not show detectable level of aflatoxin. However, milk samples collected from some area showed certain level of aflatoxin M (0.001 µg/kg 1 to 0.006 µg/kg). These findings clearly show that, fermentation of rice straw due to dampness reduces its soluble nutrients, in vitro digestibility and degradation of DM in situ, however, increases the effective degradability of CP. Dampness also leads to the transmission of aflatoxin M from fermented straw to cow's 1 milk in low level.