山东省沿海地区大白菜种植品种与生产状况

Planting Varieties and Production Status of Chinese Cabbage in Shandong Coastal Regions

对1975～2010年山东省沿海地区6个市29个县的大白菜生产状况及其品种更替特点进行调查和分析。结果表明,1975～2010年山东省沿海地区大白菜栽培面积和总产量,经历了先降低后缓慢增加再快速增加的3个发展阶段,年际间变化幅度大且整体表现出增加趋势;大白菜小产量（总产量〈10^3t）栽培品种虽然占总产量的比例小,但品种数量多,对丰富我国大白菜种质资源具有重要意义,大白菜大产量（产量≥10^4t）栽培品种数量较少,但是占总产量比例大,对于推动山东省大白菜产业发展意义重大。

The production status and cultivar succession of Chinese cabbage（ Brassica rapa L. ssp. pekinensis） in 29 counties belonging to 6 cities of Shandong coastal regions were surveyed from 1975 to 2010.The results showed that the cultivated area and total yield went through three stages of firstly decreased,then gradually increased,and finally rapidly increased,and showed increase trend on the whole with large interannual change amplitude. Although the proportion of low yield cultivars（ total yield〈 10^3t） of the total output was small,its number was abundant,which was important for enriching Chinese cabbage germplasm resources in China. The number of high yield cultivars（ total yield≥10^4t） was small,but it had high yield proportion,which played an important role in promoting the development of Chinese cabbage industry in Shandong Province.