Effects of Microbial Agents on Leaf Vegetable Wastes During Composting
In order to study the influence of microbial agents on the dynamic changes among relevant physicochemical indicators in the process of composting leafy vegetable waste,leafy vegetable waste was used as the main material and corn straw as the auxiliary material,and 4 exogenous microbial agents,VT-1000,Qunlin fermenting bacteria,Reactor special strain 001 and SUKAAgre-C3009/C,were added for fermentation,with no added bacteria agent as control,and the relevant indicators were measured and analyzed for comprehensive comparison.The results showed that at 24 d of fermentation,all the piles reached complete decomposition,and the seed germination index(G1)of the treatment with the addition of bacterium was significantly higher than that of the treatment without the addition of bacterium,among which the pile with the addition of VT-1000 microbial agents had the highest GI of 113％.The piles with added bacterium could all warm up to above 60 ℃ at 2 d,and could maintain a high temperature period(≥50 ℃)for 6～8 d,3～5 d more than without added bacterium,of which the highest temperature was 69.9 ℃ with the addition of VT-1000 microbial agents,and the high temperature lasted for 8 d,effectively solving the problem of high water content of leafy vegetables affecting the quality of compost.Combining the nutrient contents of each treatment showed that the organic matter degradation rate and total nitrogen content were the highest with the addition of VT-1000 bacterial agent,which were 21.0％and 25.8 g·kg-1,respectively.The application of self-made organic fertilizer with added VT-1000 microbial agents could significantly increase soil organic matter and total nutrient content,effectively improve soil physical and chemical properties,and the cost of self-made organic fertilizer was the lowest,which only about 1/10 of the other 2 fertilizers.Above results showed that the addition of microbial agent could promote compost maturation,increase the temperature of the pile,prolong the duration of the high temperature period,and improve the quality of compost.On the whole,the addition of VT-1000 microbial agents had the best effect.
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