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| Assessment of Agaricus bisporus residue application rate based on soil heavy metal risk and economic benefit |
| Received:October 23, 2016 |
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| KeyWord:Agaricus bisporus residue;application rate;heavy metal risk;economic benefit |
| Author Name | Affiliation | E-mail | | ZHOU Wei | College of Resources, Sichuan Agriculture University, Chengdu 611130, China | | | DENG Liang-ji | College of Resources, Sichuan Agriculture University, Chengdu 611130, China | auh6@sicau.edu.cn | | JIA Fan-fan | College of Resources, Sichuan Agriculture University, Chengdu 611130, China | | | XIONG Lei | College of Resources, Sichuan Agriculture University, Chengdu 611130, China | |
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| Abstract: |
| It was important for agriculture waste recycling that what the annual waste application rate should be estimated based on soil heavy metal safety and economic benefits. The experiment contained seven treatments with fertilizer and Agaricus bisporus residue, including CK(the control, no fertilizer), CF(conventional fertilizer), M1[25% N from mushroom residue(MR)], M2(50% N from MR), M3(75% N from MR), M4(100% N from MR), M5(125% N from MR), in Chengdu Plain from 2014 to 2016. The concentrations of Cu, Cd, Pb and Zn in soil(0~20 cm) were determined by atomic absorption spectrophotometer. The results showed that Cu, Pb and Zn concentrations showed increase trend with increasing MR application rates. Moreover, Cd concentrations first increased then decreased with adding MR application rates. Furthermore, the relationships among potential ecological risk index, comprehensive pollution index and economic benefits and annual MR application rate showed significant quadratic functions, respectively(P<0.05). Therefore, the MR rates from 11 763 to 12 850 kg·hm-2 were recommended to be the annual MR application rate based on soil heavy metal safety and economic benefits. |
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