Effects of 4 composite fermentation inoculants on the substrate conversion of forestry waste

doi:10.13466/j.cnki.lczyyj.2025.05.009

Abstract

Abstract:

Screening highly efficient composite fermentation inoculants can enhance the lignin degradation efficiency of forestry waste,effectively resolving challenges such as recalcitrant degradation and prolonged composting cycles.A 45-day aerobic composting experiment was conducted to analyze the effects of 4 inoculants-Beijia Organic Fertilizer Ferment (T1),Henan Nongfukang EM Inoculant (T2),S4 Mixed Inoculant (T3),and Organic Material Decomposer (T4)- on the composting process,product quality,and the growth of Liquidambar formosana seedlings,with an uninoculated treatment serving as the control (CK).The results showed that:1) Compared with the control,all 4 inoculants significantly accelerated the temperature escalation during composting.Among them,T1 exhibited the most rapid temperature increase,entering the thermophilic phase (>50 ℃) on day 3,and maintained the highest average temperature (57.12 ℃) during the thermophilic stage.2) Upon completion of composting,T1 achieved the maximum lignin degradation rate (43.68%),T2 had the highest cellulose degradation rate (42.29%),and T3 ranked second in both (38.32% and 42.17%,respectively).T1 and T2 exhibited the most substantial increments in organic carbon degradation rate and total nitrogen,phosphorus,and potassium contents.3) The compost substrate subjected to the T1 treatment yielded the highest seed germination index (49.35%),microbial biomass carbon,microbial biomass nitrogen,and dehydrogenase activity,signifying the optimal degree of maturity and the lowest biological toxicity.4) Pot experiments showed that,compared with peat,the substrate prepared with T1 compost significantly increased the total biomass of Liquidambar formosana seedlings by 147.48%-192.31% and the seedling quality index by 96.90%.T2 and T3 also significantly promoted the growth of Liquidambar formosana.The S4 mixed inoculant performed optimally in accelerating the maturation of forestry wastes,improving compost quality,and enhancing seeding growth.This study provides cost-effective and highly efficient inoculant alternatives for the resource utilization of forestry wastes.

Key words: composite fermentation inoculants, forestry waste, composting, substrate conversion

CLC Number:

S792.159

LUO Tanghuizi, CHANG Wenying, YANG Huajun, WEI Liben, WANG Yushu, FENG Dalan, ZHOU Xiaozhou, HUANG Xiaohui. Effects of 4 composite fermentation inoculants on the substrate conversion of forestry waste[J]. Forest and Grassland Resources Research, 2025, (5): 85-95.

Figures/Tables 8

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处理	最高温度/℃	平均温度/℃				温度>50℃ 持续时间/d	升温时间/d
处理	最高温度/℃	升温期	高温期	降温期	稳定期	温度>50℃ 持续时间/d	升温时间/d
CK	50.20	27.41	48.77	39.25	19.09	4	10
T1	65.10	33.14	57.12	46.18	21.88	8	3
T2	57.50	32.11	56.99	41.08	20.99	8	4
T3	58.30	31.19	54.01	42.33	21.37	9	4
T4	61.20	29.07	55.08	43.10	21.08	10	5

处理	发芽指数(I_G)	微生物量碳/(mg/kg)	微生物量氮/(mg/kg)	脱氢酶活性/[μg·TTC/(h·g)]
CK	42.69±1.88d	54.88± 6.35c	9.61±1.22c	8.61±1.38d
T1	49.35±2.15a	180.66±20.65a	19.16±3.95a	29.64±2.65a
T2	47.12±1.44b	157.32±15.44b	16.36±2.18b	17.54±2.11c
T3	44.64±2.12bc	162.64±21.65b	15.91±1.05b	16.25±1.52c
T4	44.98±1.34c	160.58±15.34b	18.97±2.03ab	24.66±2.30b