四川农业大学学报 ›› 1983, Vol. 1 ›› Issue (01): 109-120.doi: 10.16036/j.issn.1000-2650.1983.01.016

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播种期对油菜生长发育及产量的影响

黄静娴, 汪良中   

  1. 四川农学院农学系
  • 出版日期:1983-03-31 发布日期:2017-03-11

THE INFLUENCE OF SOWING DATE ON THE GROWTH, DEVELOPMENT AND YIELD OF OILSEED RAPE

Huang Jingxian, Wang Liangzhong   

  1. Sichuan Agricultural College
  • Online:1983-03-31 Published:2017-03-11

摘要: 以分期播种研究生态环境对油菜生长发育和产量的影响,已有不少报导。这些研究因供试品种与我省当前生产用早、中熟品种差异大,或与我省生态条件很不一致,因而参考价值不大。本文以1978-1982年度的分期播种试验资料,研究不同熟性品种,在不同播期条件下,生长发育和产量的变化及其与产量的相关性。

Abstract: Cultivars in Brassica napus L., different in ripening habit, share a law of variation of the length of each growth phase with the sowing date. The law is that the days from the flower-bud-appearing stage vary widely and that this growing phase has much influence upon the length ofthe whole growth duration. The leaf area index and the dry weight at the firstflowering stage influence greatly the seed yield. So lengthening properly thebud phase would benefit the broadening of the leaf area and the increasing of thedry matter accumulation. At an air temperature of 6-15℃, with daily meantemperature rising 1℃, flower bud differentiation would be initiated one dayearlier for an early cultivar, but 2-4 days later for a middle or late cultivan.
In view of yield components, the influence of sowing date on the seed yield is embodied mainly by the variation in the silique number and secondly by the one in the seed number per silique, whereas the weight per thousand seeds is comparatively stable.