2020, Volume 37, Issue 2
[Objective] Under the common constraints of the law of diminishing marginal returns and the resource environment, relying on factor inputs to promote agricultural growth is not sustainable. Therefore, continuous improvement of agricultural total factor productivity (TFP) is particularly important for the sustainable growth of China's agriculture.[Method] Using the multiplicatively complete Hicks-Moorsteen TFP index, China's agricultural total factor productivity growth is completely decomposed into technological progress, technological efficiency changes, scale efficiency changes and mixed efficiency changes. The adjustment of agricultural structure affects the growth of agricultural TFP by changing mixed efficiency.[Result] From the time dimension, only the change of mixed efficiency between 1992-1997 contributed 0.5 percent to the growth of agricultural TFP, that is, the adjustment of agricultural structure during this period promoted the growth of agricultural TFP. From the regional perspective, only the mixed efficiency change in the eastern region contributed 0.4 percent to the growth of agricultural TFP in the eastern region, that is, the adjustment of agricultural structure in the eastern region promoted the growth of agricultural TFP in the eastern region. The growth of agricultural TFP in China mainly comes from technological progress. The effects of agricultural restructuring on the growth of agricultural TFP are comparatively different by time and space.[Conclusion] The agricultural structure should be adjusted according to market demand, resource endowment and comparative advantage, in order to improve the mixed efficiency and promote the growth of agricultural TFP.
Seeds are the most fundamental means of agriculture production, and their vitality will directly affect the production and development of agriculture. The detection methods of seed vigor are mainly divided into two categories:non-destructive testing and lossy testing. With advantages of no damage to seed samples, high detection efficiency, online detection, good repeatability and less experimentation pollution, non-destructive seed vigor testing methods include near-infrared spectroscopy, hyperspectral detection, electronic nose detection, and machine vision detection. Based on the development status of non-destructive testing technology for seed vigor at home and abroad, this paper comprehensively reviews methods, techniques and detection results of non-destructive testing of seed vigor, and summarizes the characteristics, application status, research progress, advantages and disadvantages in practical application, summarizes the current methods of non-destructive testing of seed vigor at home and abroad, and forecasts the development trend.