Successful knowledge integration in interdisciplinary research teams is critical for solving complex problems and achieving innovation. Empirical research on knowledge integration in interdisciplinary research teams only emphasizes the role of knowledge heterogeneity but with mixed findings and ignores the impacts of team social networks where members are embedded. Based on the knowledge-based view and social network theories, we examine the effect of knowledge heterogeneity on knowledge integration in the interdisciplinary research team context and the influences of social network factors, including tie strength, structural equivalence, and betweenness centrality on the main effect. Based on a questionnaire survey of 346 members of 46 interdisciplinary research teams in a top research university in China, we find an inverted U-shaped relationship between knowledge heterogeneity and knowledge integration. Tie strength and structural equivalence positively moderate the quadratic relationship, respectively. We do not find support for the moderating role of betweenness centrality. This study extends our knowledge of the relationship between knowledge heterogeneity and knowledge integration and enriches the literature on interdisciplinary collaboration and social network theories.

跨学科研究团队的成功知识整合对于解决复杂问题和实现创新至关重要。跨学科研究团队知识整合的实证研究只强调知识异质性的作用，但结果不一，忽视了成员嵌入的团队社会网络的影响。基于基于知识的观点和社会网络理论，我们考察了跨学科研究团队背景下知识异质性对知识整合的影响，以及社会网络因素（包括关系强度、结构等价性和中介中心性）对主效应的影响. 基于对国内某顶尖研究型大学46个跨学科研究团队346名成员的问卷调查，我们发现知识异质性和知识整合之间存在倒U型关系。关系强度和结构等价性分别正调节二次关系。我们没有找到对中介中心性的调节作用的支持。本研究扩展了我们对知识异质性和知识整合之间关系的认识，丰富了跨学科合作和社会网络理论的文献。