添加一定量的氨化麦草能促进白腐菌对木质纤维的分解作用,但如果氨化麦草的添加量超过20%,生长基质的重量损失又会下降,降解速率又会降低。比较添加氨化麦草和未添加氨化麦草生长基质经白腐菌降解后的纤维素含量,发现纤维素含量没有发生太大的变化。降解不同天数氨化木质纤维氮含量的变化显示,氮含量的降低率和木质素降解率的变化规律相一致,说明有机结合氮的释放和白腐菌对氮的吸收消耗与木质素的降解有一定的对应关系。
In this experiment, it was found that addition of ammoniated wheat straw enhanced degradation of lignocellulose by white rot fungus, however, when exerted amount of ammoniated wheat straw exceeded to 20%, the weight loss of the growth substrates fell, degradation velocity decreased, there was no obvious differences of cellulose component in the lignocellulose between the treatment of addition of ammoniated wheat straw and the control during culture. Moreover, it was found that rate of nitrogen loss decreased in the culture substrates was consistent to that of degradation of lignin in the ammoniated wheat straw, indicating that release of nitrogen from the culture substrates was closed related to the absorbance of it by white rot fungus.