中文摘要：

规模化经营被普遍认为是农业现代化发展的重要方向和内容，对其经济效应的争议一直存在，规模扩大后的经营风险也不容忽视。以玉米为例，利用来自黑龙江和河南两省的普通户和规模户实地调查数据，系统比较规模户与普通户的经济效益差异，并基于定性分析深入揭示粮食规模化经营的潜在风险，结合风险防范提出建议。

英文摘要：

Agricultural scale management is generally regarded as an important direction and content of agricul- tural modernization, but controversy has also existed about its economic effects, the risk of scale expansion cannot be ignored either. Taking maize as an example, by using a set of survey data of large-sized households and smallsized households from Heilongjiang and Henan provinces, we compared the economic effects of the two kinds of households, revealed the potential risks of scale management based on qualitative analysis, and suggestions on risk prevention were also gave.