结合新疆地区冬油菜生长情况,研究了不同密度条件下冬油菜越冬率及叶面积和叶面积指数、鲜重净增量、单位面积干物质积累量、经济性状及产量、含油量.结果表明,密度对冬油菜越冬率、叶面积和叶面积指数、鲜重净增量、单位面积干物质积累量及产量和经济性状、含油量有着显著影响.30、60、90、120、150万株/hm2五个密度处理,低密度处理30万株/hm2叶面积较高,高密度处理150万株/hm2(CK)叶面积指数相对较高,而越冬率、鲜重净增量、单位面积干物质积累量、产量、经济性状和含油量均以90万株/hm2处理最高.适宜的密度水平能提高冬油菜越冬率和最终的产量、含油量.试验结论:在新疆地区冬油菜适宜密度在60～90万株/hm2.%By observing winter rape growth in Xinjiang, a study was conducted on the effect of different density on winter-survival rate, leaf area, leaf area index, net increase of fresh weight, unit area dry matter accumulation of winter rape, and yield, economic characters, oil content of winter rape in Xinjiang. The results presented that density had significant effect on these aspects. Among various kinds of density(30 × 104 plants/hm2, 60 × 104 plants/hm2, 90 × 104 plants/hm2, 120 × 104 plants/hm2 and 150 × 104 plants/hm2), the treatment of 30 × 104 plants/hm2 had relatively larger leaf area, and that of 150 × 104 plants/hm2 had higher leaf area index, while the density of 90 × 104 plants/hm2 had the highest winter-survival rate, net increase of fresh weight, dry matter accumulation per unit area, yield, economic characters and oil content in all the five treatments. Suitable density could increase the winter-survival rate, the growth and developmental characters, yield, economic characters and oil-content of winter rape. The results also indicated that the suitable density of winter rape was 60 × 104 ～ 90 × 104 plants/hm2 in Xinjiang.
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