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Acta Agron Sin ›› 2009, Vol. 35 ›› Issue (8): 1508-1515.doi: 10.3724/SP.J.1006.2009.01508

• TILLAGE & CULTIVATION · PHYSIOLOGY & BIOCHEMISTRY • Previous Articles     Next Articles

Effects of Water Table on Rapeseed(Brassica. napus L.) Growth and Yield

SONG Feng-Ping,HU Li-Yong,ZHOU Guang-Sheng*,WU Jiang-Sheng,FU Ting-Dong   

  1. College of Plant Science and Technology,Huazhong Agricultural University,Wuhan 430070,China
  • Received:2009-02-04 Revised:2009-03-14 Online:2009-08-12 Published:2009-06-10
  • Contact: ZHOU Guang-Sheng,E-mail:zhougs@mail.hzau.edu.cn

Abstract:

Adopting rice and rapeseed rotation system, the fields always have higher water table which is harmful to rapeseed at Yangzi river regions. To drain well for rapeseed in the post-rice field, we studied the suitable water table at four stages of the rapeseed growth and development with PVC tube. Agronomic traits of two rapeseed lines with different waterlogging tolerance were investigated to compare effects of different water table levels on rapeseed growth and yield. Four different water table level treatments (0, 30, 60 and 90 cm up to the soil surface) were carried out at the seedling, bud, flowering, and maturity stages, respectively. After the treatments, water level returned to 60 cm, a normal level. The results was at follows: (1) The water table determined roots depth, the development of roots, the growth of the above-ground parts and the yield; (2) The sensitivity to waterlogging different stages of rapeseed was bud stage and flowering stage > seedling stage, pod and mature period; (3) The suitable water table levels in bud stage, flowering stage/seedling stage and mature period were 30 to 90 cm, 30 to 60 cm and 30 to 90cm, respectively; (4) The water table from 30 to 60 cm may meet the requirements for growth and yield in the rapeseed , even in the more sensitive rapeseed lines to waterlogging.

Key words: Rapeseed, No-tillage paddy rice field, Water table, Yield

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