Regulation on the degradation and transformation of Naematelia aurantialba (Bandoni & M. Zang)Millanes & Wedinmedium

【Objective】 To explore the changes in the degradation and transformation of the medium in different times of growth and development of Naematelia aurantialba(Bandoni & M. Zang)Millanes & Wedin,and to understand the degradation and utilization characteristics of the N. aurantialba for carbon sources. Provided a theoretical basis for the formulation of medium.【Method】 The changes in water content,pH,the wet weight and dry weight of the medium,fresh weight of fruitingbody and the dry weight,degradation of lignocellulose were measured in 8 times of growth【0 d(not inoculated,20,25,30,35,40,45,50 d after vaccination】 of the medium,and the changes of various indicators in different growth stages were analyzed.【Result】 In the cycle of N. aurantialba growth and development,water content decreased from 60.27% to 39.00%. At 25 d pH was reduced from 5.50 to 4.55,after which pH was basically stable at about 4.20,with overall acidic conditions. The dry weight of medium from the initial 735.00 g/bag to 530.00 g/bag,the fresh weight of fruitingbody production was 644.71 g/bag. The total medium reduction was 27.89%,of which the biological efficiency was 12.33%,and the absolute respiratory consumption was 15.56%. 30 to 35 d was the first peak of fruitingbody growth,and 40 to 45 d was the second peak of fruiting body growth. In the 0-40 d of N. aurantialba growth and development, respiratory effect with the growth of fruiting body continued to increase. The use of the lignocellulose of the medium parts was in order of cellulose,lignin,hemicellulose andthe utilization rates were 33.90%,32.79% and 30.76%. The early stage(0 to 30 d)was mainly carbon source of non-lignocellulose substances,and the later stage(30 to 50 d)of growth was mainly carbon source of lignocellulose substances,of which 44.72% of the carbon sources required came from lignocellulose and 55.28% of carbon sources came from non-lignocellulose.【Conclusion】 During the growth and development cycle of N. aurantialba,the utilization rate of non-lignocellulose(starch,protein)substances is proximity to that of lignocellulose. The optimization of medium formulation can be considered from this aspect,in the hope of improving biological efficiency.