Bioconversion of Straw into Improved Fodder: Preliminary Treatment of Rice Straw Using Mechanical, Chemical and/or Gamma Irradiation.
Bioconversion of Straw into Improved Fodder: Preliminary Treatment of Rice Straw Using Mechanical, Chemical and/or Gamma Irradiation.
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DOI：
10.4489/myco.2006.34.1.014
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发表时间：
2006-03
期刊：
影响因子：
1.9
通讯作者：
Helal GA
中科院分区：
文献类型：
--
作者：
Helal GA
用赭曲霉（Aspergillusochraceus）、A. terreus或Trichoderma koningii，在稳定条件下。3种真菌对RV、SP和CP的降低率分别为22.2，2.4，7.3%，9.1，4.9，8.5%或0.0，0.0，3.6%。化学预处理的秸秆浸泡在NH 4 OH中一天，导致显着增加CP的发酵秸秆比其他碱和酸预处理。干和湿秸秆与水，特别是在较高的剂量，100，200或500 kGy的γ辐照预处理，引起RV和SP作为CP在发酵秸秆中的任何这些真菌的显着增加。化学-物理组合预处理稻草使提高真菌发酵力所需的γ辐照剂量从500 kGy降低到10 kGy，其结果大致相同。随着预处理秸秆与NH_4OH结合的γ辐照剂量的逐渐增加，发酵秸秆的RV和SP通常会显著增加。经NH_4OH-10 kGy预处理的发酵秸秆，粗蛋白含量分别提高12.4%、15.4%和8.6%。ochraceus、红腹滨藜A. terreus或T. koningii，分别。
Crude protein (CP) content of mechanically ground rice straw into small particles by an electric grinder and reducing value (RV) and soluble protein (SP) in the culture filtrate were lower than that of the chopped straw into 5~6 cm lengths when both ground and chopped straws were fermented with Aspergillus ochraceus, A. terreus or Trichoderma koningii, at steady conditions. The reduction rate of RV, SP and CP was 22.2, 2.4, 7.3%; 9.1, 4.9, 8.5% or 0.0, 0.0, 3.6% for the three fungi, respectively. Chemical pretreatment of straw by soaking in NH4OH for a day caused significant increase in CP of the fermented straw than the other alkali and acidic pretreatments. Gamma irradiation pretreatment of dry and wet straw with water, specially at higher doses, 100, 200 or 500 kGy, caused significant increase in RV and SP as CP in the fermented straw by any of these fungi. Chemical-physical combination pretreatment of rice straw reduced the applied dose of gamma irradiation required for increasing fermentable ability of fungi from 500 kGy to 10 kGy with approximately the same results. Significant increases in RV and SP of fermented straw generally occurred as the dose of gamma irradiation for pretreated straw, which combined with NH4OH, gradually rose. Whereas, the increase percentage in CP of fermented straw that was pretreated by NH4OH-10 kGy was 12.4%, 15.4% or 8.6% for A. ochraceus, A. terreus or T. koningii, respectively.