Effects of the <i>Castanea mollissima Blume</i> Shell Cultivation Substrate on the Yield and Nutritional Composition of <i>Pleurotus geesteranus</i>
- 1 Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou, China
- 2 Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou, China
- 3 Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou, China
- 4 Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou, China
Abstract
Cottonseed hull substrates blended with different ratios of <i> Castanea mollissima Blume </i> shell were prepared and used for the cultivation of <i> Pleurotus geesteranus </i> . The effects of the chestnut shell content on the mycelial growth rate, yield, nutritional composition and contents of heavy metals of the cultivated <i> Pleurotus geesteranus </i> were investigated. The results suggest that the <i> Castanea mollissima Blume </i> shell in substrate can increase the mycelial growth rate, yield, biological efficiency and the contents of protein, crude fiber, amino acids and essential amino acids of <i> Pleurotus geesteranus </i> . Further investigation suggests that the tannin and saponin in <i> Castanea mollissima Blume </i> shell and the C/N ratio of substrate significantly influence the mycelial growth rate. The crude fat content of <i> Pleurotus geesteranus </i> decreased, while the contents of heavy metals including mercury (Hg), arsenic (As), cadmium (Cd) and lead (Pb) increased with the increase of the <i> Castanea mollissima Blume </i> shell content in substrate. Based on these results, the content of <i> Castanea mollissima Blume </i> shell was optimized to be less than 30% for the cultivation of <i> Pleurotus geesteranus </i> .
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