利用高温发酵菌糠研制水稻育秧基质

将经高温发酵处理后的杏鲍菇菌糠与土壤按照比例进行配比制作水稻育秧基质,分析不同配比的水稻育秧基质的理化性质,比较研究水稻秧苗的秧苗素质、根系性状和营养吸收情况等。结果表明添加高温发酵腐熟的杏鲍菇菌糠对育秧基质的容重、总孔隙度、通气孔隙和持水孔隙具有改善作用,随着菌糠添加量的增加,容重逐渐减少,总孔隙度、通气孔隙和持水孔隙逐渐增加。水稻秧苗的株高、叶绿素含量、秧苗地上部百株干重、根的百株干重、根系活力和水稻秧苗的氮、磷、钾含量水平均优于100%土壤和100%菌糠,其中V(土壤)∶V(菌糠)为20%∶80%的基质配比更有利于水稻壮秧、干物质积累、根系生长发育和对氮、磷、钾的吸收。

Study of fermented spent mushroom substrate of Pleurotus eryngii as basic materials for rice seedling

The rice seedling-raising substrate (RSRS) was prepared with fermented spent mushroom substrate (SMS) of Pleurotus eryngii and soil.The physical and chemical indices of the RSRS were investigated.The results indicated that the fermented SMS was fully composted and was very suitable for preparing RSRS.The most appropriate proportion of soil and SMS was identified by analyzing the physical characteristics of seedling substrates,agronomic indices,root traits and nutrient contents of rice seedlings.The investigation showed that the fermented SMS effectively regulated the bulk density,total porosity,aeration porosity and water holding porosity.With the increasing of the SMS,gradually,the bulk density decreased,and the total porosity,aeration porosity and water holding porosity increased.The analysis of plant height,dry weight,SPAD,root activity and the content of N,P,K of rice seedling indicated that the combination of SMS and soil in a certain proportion was better than each of SMS (100%) and soil (100%).The results also showed that the optimal volume ratio of soils and SMS was 20%:80%.