中文摘要：

非主营业务与种业上市公司经营绩效的数量模型表明，非主营业务对种业上市公司的经营绩效有显著的正向影响，并因公司个体不同而有差异，同时因时期不同上市公司非主营业务出现较大波动和随机性。结论表明，我国种业上市公司经营环境与经营绩效与非农业上市公司相比，差距较大，我国政府和有关部门应采取有力措施，为种业上市公司提供良好的经营环境和保障体系，使其重视主营业务的经营与发展，确保种业安全和粮食安全。

英文摘要：

The economic model of performance and non-core business shows that the non-core business has a significant positive impact on performance of listed companies. This effect has differences among individuals, and has greater volatility because of different period. The conclusion indicates that the gap of operating environment and business performance is larger between seed industry and non-agricultural listed companies. Our government and concerned departments should take effective measures to provide good business environment and support system, making listed companies attach importance to the main business to ensure the seed industry and food security.