Aerobic Composting of Garden Waste and Development of Flower Seedling Substrate

The garden waste was used as the research object,using high-temperature aerobic composting fermentation technology to treat the garden waste harmlessly,and then mixed with river sediment,peat and perlite to form different seedling substrate for the nursery experiment of Viola cornuta and Leucanthemum maximum,the impact of composting method and substrate development on garden waste was studied,in order to explore reasonable utilization of garden waste.The results showed that,in the case of supplementary materials such as nitrogen and microbial inoculant,the high temperature stage maintenance time was 40 days,and the maximum temperature was 75.4℃.The pH of the reactor increased from 8.05 to 9.05,and the EC value decreased from 0.95 mS·cm^-1 to 0.63 mS·cm^-1.The content of organic matter of the composting products decreased,and the total nutrient content of the composting products increased slightly to 20.30 g·kg^-1.Judging from the color,temperature,humic acid and seed germination rate of the pile,the pile reached basic maturity conditions.Among T1 to T5（substrates mixed with garden waste and river sediment in different proportions）,the germination rate of Viola cornuta ranged from 47.00%-86.67%,T5 was the lowest,T4 was the highest,and CK was 40.33%;the germination rate of Leucanthemum maximum ranged from 45.67%-55.67%,T5 was the lowest,T2 was the highest,and CK was 35.00%.Among T1 to T5,the total fresh weight of the hundred strains of Viola cornutaranged from 2.05 g to 6.40 g,T1 was the lowest,T5 was the highest,and CK was 16.89 g;the total fresh weight of the hundred strains of Leucanthemum maximumwas from 1.54 g to 11.77 g,the T3 was the lowest,T5 was the highest,and CK was 31.27 g.Generally,the high-temperature composting method for garden waste was simple and effective,and reach the condition of initial rot,but its composting products needed to add a certain proportion of other organic materials,and its effects in the flower seedling substrate was better.