“陕春白1号”大白菜地膜春栽苗龄和直播播期试验

在陕西杨陵采用"陕春白1号"大白菜品种进行了地膜覆盖栽培试验。结果表明,直播播期从03-15～04-05,播期越迟,莲座叶的长和宽越小,球叶数减少,产量和净菜率降低。苗龄对植株生长的影响相对较小,但苗龄过短,莲座叶生长显著落后,产量显著降低。综合产量和抽薹率等因素分析认为,在陕西关中地区,该品种直播适宜播期为03-15～03-20,育苗移栽适宜苗龄为30～36d。

Experiment on sowing date and seedling age of Chinese cabbage cv.Shaan Chun-bai No.1 in the spring season underplastic film mulch condition

The experiment was conducted in Yangling,Shaanxi,China to investigate the optimum sowing date and seedling age of Chinese cabbage cv.Shaan Chun-bai No.1 in the spring season under plastic film mulch condition.The results showed that as the sowing date delayed from March 15 to April 5,the length and width of the functioning leaves,the number of the heading leaves,the yield and the edible yield rate all decreased.Compared to the sowing date,seedling age was found less effction on plant growth.However,the functioning leaf growth and yield were significantly decreased by too young seedling age.In summary,for this cultivar growing in Guanzhong area of Shaaxi province,the suggested sowing date is from March 15 to March 30,and the suggested seedling age is from 30 to 36 days.