Study on suitable ratio for bamboo sawdust and wheat bran composting as substrate of Stropharia rugosoannulata

doi:10.3969/j.issn.1004-1524.2022.05.17

Acta Agriculturae Zhejiangensis ›› 2022, Vol. 34 ›› Issue (5): 1024-1031.DOI: 10.3969/j.issn.1004-1524.2022.05.17

• Horticultural Science • Previous Articles Next Articles

Study on suitable ratio for bamboo sawdust and wheat bran composting as substrate of Stropharia rugosoannulata

WU Yifan¹^,²(), XIA Jie¹, CHEN Sheng¹, ZHANG Wei¹, XIE Jinzhong¹^,^*()

1. Research Institute of Subtropical Forestry,Chinese Academy of Forestry, Hangzhou 311400, China
2. College of Forestry, Nanjing Forestry University, Nanjing 210000, China

Received:2021-05-25 Online:2022-05-25 Published:2022-06-06
Contact: XIE Jinzhong

Abstract

Abstract:

In order to explore the feasibility of substrate utilization of bamboo sawdust, wheat bran was mixed with bamboo sawdust for composting. According to the addition rate (mass fraction) of wheat bran, four treatments were set as CK 0, T1 4%, T2 8% and T3 16%. The changes of physiochemical properties before and after composting were studied, and the application potential of the composting product as cultivation substrate of Stropharia rugosoannulata was explored as well. It was shown that, the bulk density and electrical conductivity increased significantly (P<0.05) after composting under T1-T3 treatments, yet aeration porosity, the ratio of aeration porosity to water-holding porosity,cellulose and lignin content decreased significantly (P<0.05). When the addition rate was 0-8%, with increasing addition rate of wheat bran, the composting effect got better. But, when the addition rate of wheat bran was too high, the composting time would get longer. Under T2 treatment, the high temperature durationwas 10 d, the seed germination index of composting product reached 81.73%, and the mycelial growth potential of Stropharia rugosoannulata was the best, and the mycelial growth rate reached 0.394 mm·d^-1. Thus, it was recommended to add 8% wheat bran into bamboo sawdust when composting,which would benefit for the composting, and the compost product could be used as the substrate for edible fungi with high C/N tolerance, such as Stropharia rugosoannulata.

Key words: bamboo sawdust, wheat bran, compost, substrate, Stropharia rugosoannulata

CLC Number:

S646.1
S795

WU Yifan, XIA Jie, CHEN Sheng, ZHANG Wei, XIE Jinzhong. Study on suitable ratio for bamboo sawdust and wheat bran composting as substrate of Stropharia rugosoannulata[J]. Acta Agriculturae Zhejiangensis, 2022, 34(5): 1024-1031.

Figures/Tables 8

References 23

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处理 Treatment	竹屑 Bamboo scraps/%	麦麸 Wheat bran/%	石灰 Lime/%	初始碳氮比 Initial C/N ratio
CK	99.5	0	0.5	180
T1	95.5	4	0.5	130
T2	91.5	8	0.5	100
T3	83.5	16	0.5	70

处理 Treatment	竹屑 Bamboo scraps/%	麦麸 Wheat bran/%	石灰 Lime/%	初始碳氮比 Initial C/N ratio
CK	99.5	0	0.5	180
T1	95.5	4	0.5	130
T2	91.5	8	0.5	100
T3	83.5	16	0.5	70

处理 Treatment	容重 Bulk density/(g·cm^-3)		总孔隙度 Total porosity/%		通气孔隙度 Aeration porosity/%		持水孔隙度 Water-holding porosity/%		气水比 AP/WHP
处理 Treatment	-	+	-	+	-	+	-	+	-	+
CK	0.167 a	0.165 b	74.26 b	74.77 a	52.53 b	54.46 a	21.73 a	20.31 b	2.42 b	2.71 a
T1	0.166 a	0.182 a^*	73.91 b	72.38 b	52.37 b	47.80 b^*	21.54 a	25.51 a	2.43 b	1.87 b^*
T2	0.170 a	0.182 a^*	76.25 b	72.10 b^*	55.37 a	46.17 b^*	20.88 b	27.31 a^*	2.65 a	1.69 b^*
T3	0.173 a	0.181 a^*	81.46 a	74.87 a^*	57.49 a	46.06 b^*	22.96 a	25.52 a	2.51 a	1.80 b^*

处理 Treatment	容重 Bulk density/(g·cm^-3)		总孔隙度 Total porosity/%		通气孔隙度 Aeration porosity/%		持水孔隙度 Water-holding porosity/%		气水比 AP/WHP
处理 Treatment	-	+	-	+	-	+	-	+	-	+
CK	0.167 a	0.165 b	74.26 b	74.77 a	52.53 b	54.46 a	21.73 a	20.31 b	2.42 b	2.71 a
T1	0.166 a	0.182 a^*	73.91 b	72.38 b	52.37 b	47.80 b^*	21.54 a	25.51 a	2.43 b	1.87 b^*
T2	0.170 a	0.182 a^*	76.25 b	72.10 b^*	55.37 a	46.17 b^*	20.88 b	27.31 a^*	2.65 a	1.69 b^*
T3	0.173 a	0.181 a^*	81.46 a	74.87 a^*	57.49 a	46.06 b^*	22.96 a	25.52 a	2.51 a	1.80 b^*

处理 Treatment	堆肥前 Before composting	堆肥后 After composting	T值 T value
CK	179.771 a	179.379 a	0.998 a
T1	131.223 b	86.100 b^*	0.656 c
T2	102.231 c	57.796 c^*	0.565 d
T3	71.104 d	58.627 c^*	0.825 b

Study on suitable ratio for bamboo sawdust and wheat bran composting as substrate of Stropharia rugosoannulata

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处理 Treatment	种子发芽指数 Germination index/%	菌丝生长速度 Mycelium growth rate/(mm·d^-1)	菌丝生长势 Mycelium growth potential
CK	98.76 a	0.546 a	++
T1	86.60 b	0.590 a	+++
T2	81.73 b	0.394 b	++++
T3	65.51 c	0.075 c	+

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