Grey Correlation Analysis on Relationships Between Mineral Elements and Cd Contents in Pleurotus geesteranus Fruit Body
The grey system theory was employed to analyze the relationships between mineral elements and Cd contents in P. geesteranus fruit body to provide a scientific basis for producing low Pb-content mushroom. The results showed that among 6 mineral elements, Zn content got the biggest correlation degree with the value of 0.730 5.It revealed that Zn content was the closest to Pb content, followed by K content, the final was Cu. The correlation degree order of varieties was Fuxiu 13 Fuxiu 5669 Fuxiu 43 Fuxiu 10 Fuxiu 132 Fuxiu 163Xiudi 1Xiu57 Fuxiu 69, among which, Fuxiu 13 and Fuxiu 5669 got the bigger correlation degree with the value of 0.790 4and 0.788 9 respectively, while Fuxiu 69 got the lowest correlation degree with the value of 0.575 2. It revealed that mineral elements contents had certain effects on Cd content in various P. geesteranus fruit body.