This study used rice straw waste as the main raw material and comprehensively utilizes waste resources such as biogas slurry to carry out rapid aerobic composting and fermentation of straw and biogas slurry in collaboration with cow manure.The aim was to establish an ecological,efficient,harmless,and stable disposal process for straw,and to develop and apply horticultural functional culti-vation substrates using rice straw decomposition products as the main raw material,providing theoreti-cal basis and technical support for the high-value utilization and industrial application of agricultural waste substrates.The horticultural culture substrate was prepared by adding different ratios of biogas slurry,straw,microbial bacteria and cow manure,and the temperature,moisture content,pH,nitro-gen content and organic matter content of compost were measured and analyzed.The results showed that adding straw and an appropriate amount of digestate could have a good promoting effect in preparing horticultural cultivation substrate.It could accelerate the temperature rise of compost,speed up the e-vaporation of water in the heap,have a significant impact on pH,promote the mutual transformation of organic nitrogen and inorganic nitrogen,moderately reduce the carbon-nitrogen ratio.
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