Analyses on rapeseed yield in China based on the prediction of yield potential

The maximum yield growth range of per unit rapeseed yield in China is analyzed from three aspects including photosynthesis production potential of rapeseed, the changing trend of per unit rapeseed in the previous years and potential of distribution area agricultural crops. In the paper, the potential of using light, the external potential of historical yield evolution trend and AEZ (agricultural ecological zone) are applied to calculate the per unit yield potential of Chinese rapeseed. The results show that the maximum growth range of per unit yield in different stages was different. It can be reasonably predicted the future products according to the past yield of rapeseed and its growth rate. Any variety of rapeseed and planting technology higher than above the growth range can only be promoted in restricted area or has the statistical error. The results are of reference significance to sustainable production of Chinese rapeseed.