关键词: 玉米秸秆, 玉米秸秆, 秸秆还田, 理化性状, 作物产量, 土壤

Abstract:

This paper reviewed economic studies on price transmission in the courses of producing, purchasing, circulation, wholesale and retail. Research on price transmission in vertically markets models the various price data, production index, consumer index and expectations index to proof market integration relations and estimate price transmission cycles, as well as to find out its function mechanism. Thanks to the development of market integration theory, research in this field explored well-rounded metric models. And the main research results were very closely to. To build up systematic models to input more variables based on demand and supply function, and remove the assumption of constant returns to scale of enterprises involving marketing and fully competitive market would be the development direction in this field. In this way, models draw close to the truth of economic operations.