[Objective]To analyze the basic components and mineral elements of abalone shell, so as to provide a basis for its comprehensive utilization.[Method]Basic components including moisture, crude protein, crude fat, total ash and calcium carbonate of abalone shell were determined in accordance with national standards. Calcium carbonate content was measured by EDTA titration method. Atomic absorption spectrophotometer was applied to measure the content of Ca, Mg, Fe, Zn, Cu, Mn, Cr and Pb; Hg and As were evaluated by atomic fluores cence spectrometry.[Result]Abalone shell contained 10. 5 g/kg moisture, 47. 2 g/kg of crude protein, 7.6 g/kg of crude fat, 936.5 g/kg of total ash and 925. 4 g/kg of calcium carbonate. The primary mineralelements in abalone shell were Ca (402. 0 mg/g) and Mg (1.5 mg/g). The trace elements of abalone shell were Cu (274.0 jig/g) , Fe (245.0 p-g/g) , Zn (152.0 μg/g) , Mn (21.0 μg/g) and Cr (31.0 (μg/g). Contents of harmful elements (6.0 μg/kg of As, 11.0 jig/kg of Pb, 0.7 u,g/kg of Hg) were below the level of EU.[Conclusion]The abalone shell was rich in calcium carbonateand, beneficial elements, and the contents of harmful elements were low, which can be used in the development of calcium preparations.%概述了新中国成立后地方政府土地流转制度的变迁,分析了政府主导型土地流转的主要特点和内在缺陷,从社会治理视角分析了地方政府主导土地流转的治理成本,基于交易成本理论对地方政府流转土地的治理绩效进行了评估.结果表明,地方政府主导土地流转模式是一种基于部门利益最大化的资源配置模式,其微观功能和价值主要是激励与约束并重,其宏观功能要考虑国家对政策后果的综合治理.提出了完善地方政府土地流转制度的政策思路:培育多元农地流转模式,规范地方官员行为；强调构建和谐土地流转机制是中央职责；构建公众对地方政府的认同机制.
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