White oyster mushroom (Pleurotus ostreatus) is a highly nutritious food with simple cultivation process using sawdust as its main substrate. Nowadays, availability of sawdust become a problem for some mushroom farmers. Cardboard and vegetable wastes are easily found and difficult to maintain. Based on their characteristics, those wastes can be used as mushroom growth media. This study aims to determine the effect of cardboard and vegetable waste on mushroom growth and the best media composition to obtain maximum productivity. Those wastes are used as the main substrate in eleven composition variations with complete randomized design (CRD) analysis method using One-Way ANOVA and simple linear regression statistical test. The results showed, variations in media composition affect the condition of the media which then influence the growth of P. ostreatus. Maximum productivity was found in media composition XI with mycelium growth rate up to 3.91 cm/day, media IX with the biological efficiency up to 45.38%, and media X with the highest total yield up to 97.28 grams. From this study it can be concluded that cardboard and vegetable waste can be an alternative growth substrate for P. ostreatus in urban areas with a maximum concentration of vegetable waste no more than 30% by weight of the media used.
Edible mushrooms are highly cultivated by mushroom farmers in Sleman, Daerah Istimewa Yogyakarta, Indonesia because of its nutrition content that have benefit for health. The problem facing by the farmers is related with the disease caused by mites, locally called krepes. This research aims to study the variation of edible mushrooms which can be the host for the mites and its effect on the nutrition quality of the mushroom. Mites were inoculated into the mushroom baglog. The temperature and humidity were controlled during the mushroom’s growth. Proximate analysis was conducted to know the nutrition composition of the mushroom. The result showed that mites which caused krepes only growth in ear mushroom (Auricularia auricula) that has carbohydrate composition of 28.69%, the highest among edible mushrooms studied in this research. Generally, there were decreasing value in carbohydrate and protein composition with increasing value of water content in the edible mushrooms inoculated with the mites. Further study to investigate the specific type of carbohydrate used by the mites should be performed.
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