Fifty years experience of development of cultivars and cultivation of oilseed rape in Jiangsu Province.

Fifty years(from 1959 to 2009) experience of of cultivars and cultivation of oilseed rape in Jiangsu Province was summarized in this paper.Development of cultivation techniques of oilseed rape was started from gathering farmers' experience.Consequently,three cultivation strategies technically for high yielding were developed.The core of each of the strategy is that a decision of field management and fertilizer application made is based on the judgment of individual plant and population growth status and their developing potential by means of inspection.After that,technological system of population quality development was constructed.Recently,technology of field management of quality guarantee characterized with cost saving was set up.It was the application of the technology that made oilseed rape production growing up rapidly.Historically,three major periods of cultivar substitution including Brassica campestris substituted by B.napus during 1960's and non-double low transition to double low quality in the end of 1980's and conventional cultivation substituted by hybrids had been experienced in the process of oilseed rape cultivar development.As a result,the seed yielding and quality in production scales of oilseed rape were raised significantly by each substitution.Oilseed rape used to be termed a small crop in the past time.It has become one of the four major crops in Jiangsu now.So,the of cultivar and cultivation in past 50 years has made a great contribution to the sustainable of oilseed rape industry in Jiangsu.