Redundancy theory and its application in agro-ecosystem management
冗余理论及其在农业生态系统管理中的应用

Redundancy theory is an ecological theory developed in 1990s.This paper gave a brief introduction on the concept of redundancy,its hypothesis and redundancy degree,and briefly reviewed the research advances in redundancy theory and in the methodologies about species redundancy,layer redundancy,gene redundancy,and growth redundancy.A hypothesis of optimal growth redundancy degree (OGRD) was proposed,i.e.,under certain cultivation and management conditions,there existed a growth redundancy degree corresponding to the highest crop yield,and a high yield would be obtained if OGRD could be achieved through the regulation of management practices.The hypothesis was tested by using the data from high-yielding rice cultivation cases.