采用正交试验设计，研究萝卜不同品种、密度、播期对产量的影响。
Influence of variety, density and sowing time on radish yield was studied utilizing orthogonal test.
随密度增加、施氮量增大或播期延迟，胚中脂肪含量均在峰值之后下降缓慢，成熟时脂肪含量均有增加。
With density and nitrogen application being increased or sowing date being postponed, the fat content was slowly falling after the peak value, but increased at mature period.
为给茎瘤芥的标准化栽培技术提供依据，研究了播期和密度对茎瘤芥主要经济性状的影响。
The effect of the sowing date and density on the main economic characters were analyzed in tumorous stem mustard.
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