Cap Diameter Research Articles

The Growth of Oyster Mushroom on Ramie Chip Waste-Derived Media was Accelerated by Rice-washed Water

Rice-washed water is wastewater resulted from the rice cleaning process that is rich in nutrients. The use of ramie chip waste can be considered a potential substrate due to its lignocellulosic nature, similar to other wastes studied. This study aimed to examine the effect of rice-washed water on the mycelium and pinhead growth of white oyster mushrooms grown in the ramie chip waste as the growing medium. The experiment was conducted for three months using a completely randomized design with four rice-washed water treatments and six replications. The rice-washed water concentration treatments were 0% (K0), 25% (K1), 50% (K2), and 100% (K3), which were added to the ramie chip waste as the growing medium for white oyster mushroom. The time of mycelium propagation velocity, the time the first pinhead appearance, the number of mushroom bodies, and the largest cap diameter were observed. The results showed that ramie chip waste-derived media was suitable to cultivate white oyster mushrooms. Adding 100% rice-washed water to the media significantly affected the speed of mycelium propagation (16.51 days) compared to control (30 days) and the appearance of the first pinhead (31.5 days) compared to control (38.5 days) as well as the number of fruiting bodies of mushroom (8.8) compared to control (6.2). However, the rice-washed water application did not significantly affect the diameter of the largest mushroom cap.

Growth and Yield Performance of Pleurotus ostreatus Cultivated on Agricultural Residues

Food insecurity and malnutrition are among the major problems in most developing nations recently. Mushroom cultivation is one of the promising strategies to overcome these challenges. The growth and productivity of mushrooms differ because of their wide range of cultivation substrates. Cultivating Pleurotus ostreatus on suitable substrates is one of the key factors affecting its growth and productivity. This study was, therefore, conducted to investigate the effect of cultivation substrates, namely straws of tef (Trt1), barley (Trt2), and wheat (Trt3), husks of faba bean (Trt4) and field pea (Trt5), and sawdust (Trt6) alone, and their mixture (1:1, w/w) (Trt7) on the growth and yield of P. ostreatus. Mycelial colonization, primordial formation, and days to first harvest were faster (13.00, 19.67, and 22.67 days) for the P. ostreatus cultivated on Trt7 whereas those grown on Trt6 were delayed (18.00, 27.00, and 29.67 days), respectively. Trt7 gave a higher (67.33) fruiting body/bunch and total yield (2001.70 g/bag). Biological efficiency was also significantly (p < 0.05) higher for Trt7 (238.64%). Strong relationships between cap diameter and mushroom yield (r = 0.84***), number of bunches (r = 0.76***), number of fruiting bodies (r = 0.80***), stipe length (r = 0.83***), and total yield (r = 0.84***) were among significant positive correlations observed. In conclusion, cultivating P. ostreatus on the Trt7 (mixed substrate) is recommended rather than using either of the residues alone.

Evaluation of Black-jack (Bidens pilosa L.) substrate for the production of Oyster (Pleurotus ostreatus) mushroom

Using commonly used agricultural byproducts as a substrate for cultivating mushrooms is challenging due to their high cost. Finding economically viable alternative substrates with a high biomass return, particularly for mushroom production like P. ostreatus, is essential. The aim of this study was to determine the feasibility of the weed (Black-jack straw) for oyster mushroom cultivation. Oyster fruiting bodies were obtained from mushroom growers in Mekelle city, Ethiopia. Mycelial culture was secreted via tissue culture and it was used as inoculum for spawn development. The substrates were chopped, weighed (500 g dry weight of substrate), and sterilized. The substrates were packed in polyethylene bags, inoculated with 4% (w/w) spawn. The five treatments, consisting of various blends of Black-jack and wheat straws, were arranged in completely randomized design with triplicates. The highest average total yield (351 g/bag) and biological efficiency (70.20%) were obtained from 100% Black-jack straw. However, lower yield (199 g/bag) and biological efficiency (39.80%) were obtained from 100% wheat straw. Higher (8.78 cm) mean cap diameter and higher (3.48 cm) mean stipe length were recorded from 75% wheat straw + 25% Black-jack straw and 50% wheat straw + 50% Black-jack straw. This study revealed that the best substrate for overall mushroom yield and biological efficiency was 100% Black-jack. Therefore, the Black-jack straw can be considered as low-cost substrate to effectively substitute wheat straw for the cultivation of oyster (Pleurotus ostreatus) mushroom in the studied area.

Valuation of the growth response of oyster (Pleurotus ostreatus) mushroom on partially composted sesame stalk with different blends of wheat straw

Aside from being a significant source of highly nutritious and medicinally valuable mushrooms, mushroom cultivation is an important means of environmental remediation. Oyster mushroom (Pleurotus ostreatus) is a versatile mushroom that can be grown in various environmental conditions and non-composted lignocellulosic wastes. The present study was conducted to assess the growth response of oyster mushroom on sesame stalk. Spawn was prepared from a mycelium culture grown on potato dextrose agar. The spawn was inoculated onto sesame stalk and wheat straw substrates and incubated at room temperature in the dark for 21 days. A Completely Randomized Design (CRD) was used with five treatments, including the control (100% wheat straw), which were triplicated. Data was analyzed using Minitab version 19. Significant (P < 0.05) differences in days taken for mycelial colonization, primordial appearance, maturity and yield was observed between the substrate formulations. 100% SS (100% sesame stalk) was fastest (19.00 days) in mycelial colonization period but statistically parity with 75% SS + 25% WS (75% sesame stalk + 25% wheat straw). 75% SS + 25% WS (75% sesame stalk + 25% wheat straw) was faster (3.33 days) for primordial appearance while 100% SS(100% sesame stalk) was faster (6.67 days) in maturity. The highest yield (1850 g) and biological efficiency (185%) was recorded by 100% SS (100% sesame stalk). Pearson’s correlation showed that cap diameter and stipe length directly correlate yield and biological efficiency and faster substrate colonization leads to quicker maturation. The current study suggests that sesame stalk can be an alternative substrate for cultivation of oyster mushrooms.

Study on the synthesis of nanoparticles and their power characteristics in a bubble liquid membrane reactor

Abstract A bubble liquid film reactor is a new type of reactor used for preparing nanoparticles, which has strong inflation ability and dispersion, homogenization, and emulsification effects, especially suitable for preparing loose nanoparticles. In the actual production of enterprises, there is an urgent need to expand production capacity and scale up the reactor. Due to the lack of power characteristic data during the reaction process, it is difficult to select the motor, resulting in unnecessary energy and cost waste. Therefore, the power characteristic data of bubble liquid film reactors urgently needs to be studied. This article investigates the influence of operating conditions such as bubble cap diameter and immersion depth on stirring power and obtains the power characteristics during the operation of a bubble liquid film reactor. The results indicate that the larger the diameter of the bubble cap disk, the stronger the power consumption, but the smaller the power input capacity. The deeper the immersion depth, the higher the power consumption and the stronger the power input capability. Finally, fitting the dimensionless power standard formula provides a mathematical model for reactor amplification, providing theoretical guidance for enterprises to expand production lines and increase production capacity, and providing data support for motor selection.

The Effect of Adding Tea Dregs on The Growth of Brown Oyster Fungus (Pleurotus cystidiosus) on Sawdust Planting Media

The aim of the research was to determine the effect of adding tea dregs on the growth and the effective composition of tea dregs on the growth of brown oyster mushrooms (Pleurotus cystidiosus) on sawdust planting media. The type of research is quantitative with an experimental method using a Non-Factoral Completely Randomized Design (CRD) with 5 treatments and 4 replications. Data analysis in the study used parametric tests, namely the Anova test and LSD test as well as non-parametric tests, namely the Kruskal Wallis test and the Mann-Whitney test with SPSS. The results showed a significant effect on mycelium growth (Sig 0.014), number of fruit bodies (Sig 0.016), fruit stalk length (Sig 0.017), wet weight of harvest (Sig 0.000) and a significant effect on the age at which fruit bodies emerged (Sig 0.045) and had no significant on the diameter of the fruit cap (Sig 0.088) of brown oyster mushroom (Pleurotus cystidiosus). The best treatment for each observation parameter was mycelium growth in treatment P4 (19.3938 cm), age of emergence fruit bodies in treatment P0 (34.5 days), number of fruit bodies in treatment P4 (5.375), diameter of fruit cap in treatment P0 (12.3 cm), fruit stalk length in treatment P4 (10 cm), and wet harvest weight in treatment P4 (91 grams). The most effective treatment for the growth of brown oyster mushrooms ((Pleurotus cystidiosus) is P4 treatment with 25% (375 grams of Tea Dregs + 75% (1,125 grams of Swadust).

Laboratory modelling of stiffened deep mixing columns with variable diameter under vertical load in loose sand

ABSTRACT The T-shaped deep mixing column (TDM) is a new proposed technique used to increase the ultimate load of the deep mixing column in loose sand. Enlarging the column diameter at a certain depth provides additional bearing area beneath the column under the enlarged part, which leads to an increase in the ultimate load. In this study, a series of laboratory tests were conducted to study and analyse the behaviour of stiffened deep cement mixing columns in loose sand under compression loading. The impact of different parameters such as stiffening methods, embedment ratio, TDM cap length ratio, TDM cap diameter ratio, and the position of the T-shape were studied. It is found that all stiffening methods significantly enhance the load-settlement response of the deep cement mixing (DCM) columns. The stiffening technique of reinforcement bars with a T-shape gives the greatest improvement, increasing the ultimate load by 191.1% compared with the conventional column.

Size-dependent bistability of magnetic states in soft magnetic cap arrays

We have investigated the size dependent energy barrier regarding the transition between magnetic vortex and collinear states in dense arrays of magnetic cap structures hosting magnetic vortices. The cap structures were formed by the deposition of soft magnetic thin films on top of large arrays of densely packed polystyrene spheres. The energy barrier associated with the magnetic field assisted switching from a collinear magnetic state to a non-uniform vortex state (or vice versa) was tuned by tailoring the diameter and thickness of the soft magnetic caps. At a sufficient temperature, known as the bifurcation temperature, the thermal energy overcomes this energy barrier and magnetic bistability with a hysteresis-free switching occurs between the two magnetic states. In magnetic caps with a fixed thickness, the bifurcation temperature decreases with increasing cap diameter. On the other hand, for a fixed diameter, the bifurcation temperature increases with an increase in film thickness of the cap structure. This study demonstrates that the bifurcation temperature can be easily tailored by changing the magnetostatic energy contribution which in turn affects the energy barrier and thus the magnetic bistability.

Development of a Stretchable and Removable Electrical Interconnection Solution for Ultra-Thin Electronic Components

Currently, the solutions for interconnecting electronic components with their active face facing on substrates are based on metallic soldering. The mechanical contacts are therefore rigid. In order to enhance the reliability of the bonding, underfill is usually used to redistribute the thermo-mechanical stress created by the Coefficient of Thermal Expansion (CTE) mismatch between the silicon chip and substrate. Underfill is done with epoxy resins containing silica fillers (SiO2). As a result, the removal of components is no longer possible. Moreover, this solution is not suitable for devices integrating ultra-thin silicon components (&lt;100 μm) hybridized on flexible substrates that may be subject to deformation. This is the case, for example, of medical “patches” worn on the person and continuously solicited. Indeed, the rigid contact points are likely to break. To address this issue, we are developing a thin anisotropic conductive and stretchable adhesive film inspired by the adhesion of the gecko. Thanks to the microstructuration of its toes involving about 1 million setae, the gecko can develop a large contact surface and thus a large force of attraction by the multiplication of van der Waals interactions. In this work, this “dry adhesion” based on the principle of “contact splitting”, was implemented in order to improve the adhesion of a flexible interconnection. For this purpose, the surface of a polydimethylsiloxane (PDMS) film was structured with micrometric mushroom-shaped patterns known to be the most efficient form of contact. To this end, silicon molds with varying mushroom geometries were used to shape the PDMS (with different cap and pillar diameters) and the adhesion force microstructured films were assessed (shear and pull-off experiments). To make these films locally conductive through the thickness, a conductive composite was prepared and locally deposited in the mold. One approach we investigated, was using a screen-printing mask. This approach has been implemented and characterized using electrical tests (I-V measurements) in order to select the most suitable films to make a flexible interconnection.

Utilizing locally accessible substrate, to maximize oyster mushroom (Pleurotus ostreatus) growth and bioconversion efficiency in Ambo, Central Ethiopia

The effect of different locally available wastes as the substrates on oyster mushroom growth and bioconversion efficiency was investigated. P. ostreatus was grown on different substrates prepared from corn cob, sorghum stem, faba bean straw, pea straw, coffee husk, and sawdust alone (100%), and all with cottonseed waste in (1:1) ratio. Cottonseed waste alone was used as a control. Spawn run days, harvest days, average mushroom weight, fruiting body, cap diameter, stipe length, total yield, and biological efficiency were evaluated. All the quantitative data gathered were analyzed by SPSS statistical software for Windows version 25. Pea straw alone (T7) and pea straw:cotton seed waste (1:1) ratio (T8) with 15±2 and 15±3.1 days, had the shortest mycelia run, whereas sawdust alone (T11) took longer with 33±6.7 days for mycelia run. T7 had the shortest incubation to the first harvest 24±5.2 days, while T11 had the longest incubation to the first harvest 46±8.1 days. T11, 90±12 days, took the longest total production cycle, while T7, 63±6.6 days had the shortest total production cycle. T7 produced the greatest, number of fruiting bodies (254±48.5), whereas T11 produced the fewest fruiting bodies (20±5). The highest and lowest yield was obtained from the T7 substrate with 1614±17.1g and T11 substrate with 384±37.9g, respectively. The best substrate was found to be the T7; with mycelia run 15±2 days; incubation to 1st harvest 24±5.2 days, shortest production cycle 63±6.6 days, fruiting bodies 254±48.5, the highest total yield of 1614±17.1g and biological efficiency of 323±48.9%.

SAGO STARCH AND SODIUM ALGINATE AS NATURAL CROSSLINKING FOR CAPSULE ALTERNATIVES

Capsule shells are generally made from gelatin. The gelatin that is spread in the world is commonly derived from pigs. This animal is forbidden to be consumed by Muslims. This issue is due to the halal aspect. Sago starch and sodium alginate are halal materials that are capable of gelatinizing. This property made it able to be molded as a capsule. This research aims to determine the formula of sago and sodium alginate as a capsule and the evaluation. Three formulas were made with the ratio of sago and sodium alginate 100%: 0% (formula 1), 50%: 50% (formula 2), and 0%: 100% (formula 3). The capsule was manually molded using a food-grade stainless steel capsule mold. The size of the capsule, weight uniformity, swelling, and disintegration time were determined for a physical evaluation. SLD was used to determine the best formula, and the validation was done using One-sample T-test. The evaluations of the capsule shell were found ranged as follows: the size specifications were 21-22 mm, the body diameter was 6.1-7.2 mm, the cap diameter was 13.6-13.8 mm, weight uniformity was 0.10-0.26 gram, the swelling test was 433-1583%, and the disintegration time was 10.20-14.43 minutes. The best formula based on the SLD of the experiment was formula 3, which are two parameters that met the requirements, i.e., swelling and disintegration time. The sago and sodium alginate were crosslinked, and the capsule was made. However, the performance dislike of gelatin capsules. Continued research shall be done to find the optimum formula and its characteristics for alternative material on halal capsules.

Investigation of the use of Arthrospira (Spirulina) platensis and Cladophora glomerata algae in Agaricus bisporus (white button mushroom) cultivation to increase growth and yield

This study was conducted with three replicates using three different doses of Cladophora glomerata and Arthrospira (Spirulina) platensis algae (C. glomerata dry weight dose 10 g, 25 g, and 50 g; A. platensis dry weight dose 5 g, 12.5 g, and 25 g ) in order to develop and determine the most suitable growing media for Agaricus bisporus species. Between 28.04.2021 and 10.07.2021, research trials were conducted in a private mushroom production enterprise in Korkuteli District of Antalya Province. The composts in which the seed mushroom mycelia of "Amycel Company" were planted and inoculated were obtained from "SMS Ersanlar Compost Company" in this district. During the research, some distinguishing characteristics of mushroom quality such as mushroom yield, average mushroom weight, mushroom cap and stem weights, mushroom cap diameter, and height, mushroom stem diameter and length, total mushroom length, dry weight, ash weight, and pH were analyzed. It was observed that Algae treatments to composts generally gave better results than the control group. Cld 250 and Spr 250 application doses increased the total mushroom yield by 7% and 15%, respectively.

Study on the performance of the burn pond for bubbling and hydrogen distribution

The burn pond is a relatively efficient and safe way to deal with the hydrogen emitted or leaked in experiments. The aim of this paper is to analyze the performance of the burn pond in bubbling and dispersing hydrogen. The numerical simulation is the primary method utilized in this study, with a small-scale experimental validation. And Taguchi method is proposed to process data and quantify the importance of each factor. The results show that the water depth affects the performance of the burn pond most significantly, accounting for more than 56 %, followed by the outer diameter of caps and the number of slots. In addition to these design factors, the velocity of hydrogen also has a considerable impact on the burn pond. Essentially, the four factors determine the size and kinetic energy of bubbles, which then directly affect the process of bubbling and hydrogen distribution. The conclusions provide an orientation for optimizing the parameters related to bubble caps and the burn pond.

An improved simplified model of self-piercing riveted joints for predicting quasi-static mechanical behavior of steel–aluminum hybrid components

The problem that the existing models could not accurately predict sheet deformation modes in the riveting area led to low prediction accuracy in crash simulations for steel-aluminum hybrid structural components in vehicle bodies. An improved simplified model with rigid and washer-processed elements (CONSTRAINED_SPR4_RIGWE) is proposed to calibrate the mechanical behavior of self-piercing riveted (SPR) joints based on the *CONSTRAINED_SPR4 model. The diameters of rigid and washer-processed elements in the upper and lower sheets were based on the diameters of the rivet and bottom of the SPR joint, respectively; the influence domain in the joint was determined by the diameter of the rivet cap. The parameters of the two models were calibrated using the experimental results of the lap shear, pull-out, mixed tension–shear, and peeling tests, as well as the parameters from the detailed three-dimensional model. Compared with the *CONSTRAINED_SPR4 model, the CONSTRAINED_SPR4_RIGWE model had a higher stiffness value for pull-out and peeling specimens, which was closer to the experimental result. T-shaped and C-shaped structural components of DP590 high-strength steel and AC43500-T7 cast aluminum sheets were prepared using SPR joints. For the T-R4 component, the absolute prediction error of the CONSTRAINED_SPR4_RIGWE model in terms of the energy absorption was lower than that of the *CONSTRAINED_SPR4 model, with the former being 2.48 % and the latter being 16.53 %. For the C-R8 component, the absolute maximum prediction errors of the CONSTRAINED_SPR4_RIGWE model in terms of peak force, failure displacement, and energy absorption increased from 16.82 % to 149.42 %, as compared with those of the *CONSTRAINED_SPR4 model.

Central corneal distortion after small-incision lenticule extraction.

A 33-year-old woman with a prior history of small-incision lenticule extraction (SMILE) presented with gradual deterioration of vision in her right eye since the surgery. She had undergone bilateral SMILE for myopic correction (-7.00 diopters [D] in the right eye and -6.00 D in the left eye) 3 weeks prior. SMILE was performed with a Zeiss VisuMax femtosecond laser system, with a cap thickness of 120 µm, a cap diameter of 7.50 mm, and a lenticule diameter of 6.50 mm. At the completion of the surgery, loose epithelium was noted at the SMILE incision bilaterally, and bandage contact lenses were placed in both eyes. On the first postoperative day, the patient's uncorrected distance visual acuity (UDVA) was 20/40 in both eyes. The bandage lenses were removed from both eyes, with the epithelium intact. At the first-week postoperative visit, her visual acuity was recorded as 20/30 in the right eye and 20/20 in the left eye. She noticed her vision in the right eye was not as sharp as that in her left eye. She denied experiencing any pain, redness, or ocular surface irritations. She was advised to return to the clinic for a 1-month postoperative visit and continue with aggressive lubrication in both eyes. However, a week later, the patient returned for an emergency visit, citing significant central visual distortion in the right eye and difficulty working on the computer. At this visit, her UDVA and corrected distance visual acuity (CDVA) was 20/50 in the right eye and 20/15 in the left eye at both near and far distances. A slitlamp examination revealed mild central changes in the right eye. She once again denied any pain, redness, or irritation. She was advised to continue with artificial tears and return to the office in 1 week for further observation of the central distortion in her right eye. Upon returning to the clinic at the third postoperative week, the patient still complained of central visual changes in the right eye, with a visual acuity of 20/70. Further slitlamp examination revealed a nonspecific central haze in the same eye, but there was no corneal staining or signs of epithelial defects. Anterior segment ocular coherence tomography (AS-OCT) and NIDEK topography were performed, showing the same central distortion in the right eye (Figures 1 and 2JOURNAL/jcrs/04.03/02158034-202311000-00016/figure1/v/2023-10-18T004638Z/r/image-tiffJOURNAL/jcrs/04.03/02158034-202311000-00016/figure2/v/2023-10-18T004638Z/r/image-tiff). Based on the examination and images provided, what is your working medical diagnosis? What other medical conditions are in your differential diagnosis? What medical and/or surgical interventions would you recommend, if any?

Growth, Yield and Yield Related Parameters of Oyster Mushroom (Pleurotus Ostreatus) as Affected by Proportion of Coffee Husk and Wheat Bran

Purpose: This study was conducted in order to evaluate growth, yield and yield related parameters of oyster mushroom as affected by proportion of coffee husk and wheat bran.&#x0D; Methodology: The mushroom culture was grown on malt extract agar and the spawn was prepared on yellow color sorghum grain. The substrate was sterilized and inoculated with (10%) spawn. The experiment was laid in completely randomized block design in triplicate. The data collected were analysed by using SPSS software version 20.0 and were compared by LSD at (p≤ 0.05). The shortest days for complete mycelium colonization, primordia formation and first maturation of oyster mushroom after substrate inoculation were (19), (21.66) and (28.33) respectively from T3RI. The largest cap diameter (12.18cm) was observed from T3RI, maximum number of bunches (4.66) recorded from T5RI. T3RI. The longest incubation to 1st harvest was recorded for T7RI (44.33) days. In this study, the fresh weight of the 1st harvest was (354g) to (393g). The highest total flush weight was (806.33g/500g) T3RI and highest biological efficiency (161. 26%) T3RI. &#x0D; Findings: The finding of this study put forward that Pleurotus ostreatus grow on locally accessible agro processing by products and has the potential to secure food self insufficiency of low income community.&#x0D; Unique Contribution to Theory, Practice and Policy: In this experiment, converting coffee husk alone or together with different proportion of wheat bran resulted in highest growth, yield, yield related parameters and biological efficiency of the oyster mushroom. Form all the substrates and substrate composition tested in this investigation T3RI, coffee husk, wheat bran in the ratio of 90:10 gave maximum in all the parameter evaluated; as a result this composition of substrate mix ratio need to be evaluated for farm, pilot and large scale production of oyster mushroom in the dry coffee processing areas.

An intelligent mushroom strain selection model based on their quality characteristics

The great versatility of mushroom production and the significant nutritional and medicinal properties of the crop make it a highly attractive product that is in continuous expansion around the world. However, its quality can be affected the combination of a large number of evaluable variables that are essential to take into account. Thus, the aim of this work was to build an intelligent model for the prediction of mushroom strains through the development of neural networks (ANNs) that takes into account the control of data processing times, with the use of the minimum possible number of parameters that define their quality control and subsequent selection. In addition, a user-friendly and intuitive graphical interface has been generated that shows the selection of the appropriate mushroom strain and may be useful for potential end-users in this field. For this purpose, 7 mushroom strains (Agaricus bisporus) defined by a total of 27 quality parameters were used (texture, colour, etc.). The results showed that, in the analysis of individual parameter combinations (Rt), the best overall accuracy achieved (OAA) was 52.43%, reaching 81.30% with the combination of four parameters (dry matter (%), crude protein (Nx4. 38. %), Fb and Wt) and 94.32% with 9 parameters (Cap diameter (mm), dry matter (%), crude protein (Nx4.38. %), ΔE, browning index (BI), Fb, Wb = Fb x Db/2, Wr and Rt). The development of this model allows for the identification of some of the most important commercial white hybrid strains of high-yielding mushrooms, while also being a useful tool for the selection of the most important parameters of interest as regards the quality and benefits of this product for the consumer.

The effect of coffee grounds and sawdust Tectona grandis L. f. as planting media for cultivation oyster mushroom Pleurotus sp.

This study aims to determine the effect of the use of coffee grounds and sawdust Tectona grandis L. F as planting media on the cultivation of oyster mushrooms Pleurotus sp. This research was conducted in December 2021 - March 2022. This study used a completely randomized design (CRD) method consisting of 1 factorial. This study used 5 treatments with 3 replications, so a total of 15 baglogs were used. The data obtained were analyzed statistically using the F test and further tested with the 5% Least Significant Difference (LSD). The results showed that the addition of several doses of coffee grounds had a significant effect on fruit body growth time, fruit body fresh weight, fruit body dry weight, and fruit cap diameter. The fastest growing time of oyster mushroom mycelium was at P0 (sawdust Tectona grandis 2 kg + control) an average of 4.67 days, the fastest fruit body formation speed was P0 (sawdust Tectona grandis 2 kg + control) with an average of 15.67 days, fresh fruit weight the fastest with an average of 106.33 g, the dry weight of the fruit body of the heaviest oyster mushroom with an average of 33 g, and the diameter of the largest fruit hood with an average of 30.3 cm, meanwhile for the P3 treatment (sawdust Tectona grandis 0.5 kg + 1.5 kg coffee grounds) and P4 (coffee grounds 2 kg + control) were not suitable for the growth of oyster mushrooms.

The Effect of Banana Stem Powder on the Productivity of the Brown Oyster Mushroom (Pleurotus cystidiosus)

Background: Brown Oyster Mushroom (Pleurotus cystidiosus) is a type of mushroom that has different advantages from other oyster mushrooms. Generally, farmers make planting media for brown oyster mushrooms made from sawdust of sengon wood. The availability of raw materials for sawdust of sengon wood is increasingly difficult to obtain. So we need other alternative materials as a source of nutrition, one of which is banana stem waste. This study aims to determine the effect of banana stem flour on the diameter of the cap, the number of fruiting bodies, and the wet weight of the fungus. Methods: This study used a completely randomized design (CRD) which consisted of one factor. This study used 4 treatments and 3 replications. Data was tested by quantitative descriptive analysis using the Analysis of Variance (ANOVA) test. Results: Banana stem flour has a significant effect on all parameters. The JM2 treatment resulted in a cap diameter of 10.3 cm, mushroom fruiting bodies of 10.6 and wet mushroom weight of 103.8 g. Conclusion: The addition of banana stem powder can increase productivity in the parameters of mushroom cap diameter, number of mushroom fruiting bodies, and wet weight of mushrooms, which can be used by readers or researchers. Utilization of waste such as sawdust of sengon wood and waste of banana fronds for the cultivation of brown oyster mushrooms is one way of handling plantation waste.

Utilization of Agro-Industrial Wastes and Organic Supplements for Cultivation of Blue Oyster Mushroom

Mushroom cultivation is a cost-effective biotechnological approach for converting diverse lignocellulosic wastes into nutritionally rich food. Hypsizygus ulmarius is a high yielding mushroom gaining popularity nowadays. In the present study the suitability of various available agro-industrial wastes and supplements for the cultivation of H. ulmarius was evaluated. Results indicated that among the seven locally available substrates, wheat straw substrate was found to be the best substrate as the highest yield (744.08 g/0.6 Kg dry substrate) and biological efficiency (124.00 %) were obtained. Number of sporophores was more in wheat straw substrate while stipe length was longest in pine needles and cap diameter was recorded maximum in maize straw. Moreover, yield was also recorded more in wheat straw supplemented with cotton seed hull significantly followed by the same substrate when added with gram flour and rice bran. However, lowest yield was obtained when no supplement was added in wheat straw. Bangladesh J. Bot. 52(1): 179-185, 2023 (March)