【摘要】 油菜受渍试验表明 :油菜产量与油菜生育期内地下水埋深、油菜生育期内累积超标水位SEW30 以及关键生育期持续受渍天数有着密切的关系。油菜生育期内地下水埋深越浅、时间越长 ,累积超标水位值越大 ,油菜的减产幅度就越大。为了获得较高的产量 ,油菜生长期的地下水埋深宜控制在 70～ 10 0cm。为了不致造成较大减产 ,油菜花果期的SEW30 应控制在 60～ 80cm·d ;就全生育期来看 ,SEW30 应控制在 13 0～ 15 0cm·d。更多还原

【Abstract】 There is a close relationship among rape yield, buried depth of groundwater in period of rape growth and SEW 30 called sum of over-stand groundwater,and days of continuously suffering subsurface waterlogging. The more shallow of buried depth of groundwater and the longer of it continuing, and the bigger of sum of over-stand groundwater, the more serious of rape yield reduction. In order to obtain a higher yield, it is suitable for buried depth of groundwater in rape growth stage to be controlled from 70 cm to 100 cm. To avoid more yield reduction of rape, the value of SEW 30 in rape flower-pods stage should be controlled 60～80 cm·d. In view of whole growth, the value of SEW 30 should keep within 130～150 cm·d.更多还原