水稻在涝渍条件下的产量形成试验初报

Study on the Yielding Process of Rice under Waterlogged Conditions

采取大田试验与大面积调查相结合的方法 ,考察了中稻在不同涝渍条件下的产量形成。结果表明 ,在水稻生长正常年份 ,中稻受涝渍影响平均减产 1 6%～ 2 7%,单产减收 86.8～ 1 44.5kg/ 667m2 ,涝渍受害显著。中稻长期受涝渍灾害主要的影响表现为前期不发 ,并导致后期成穗数量减少 ,涝渍可能将中稻单产限制在 450kg/ 667m2 水平线上。严重涝害则主要影响水稻的结实率和千粒重。

With the method of field experiment and large scale survey,the yielding process of rice under waterlogged conditions was studied.The results showed that in normal years,the yield of the one season rice decreased by an average of 16%～27%, which was equal to the yield 86.8～144.5 kg/667 m 2 because of waterlogging and seasonal flooding.The rice under waterlogged conditions experienced slow growth, resulting in notable decreases in ear formation.On the other hand,the rice which suffered from seasonal flood decreased in the bearing rate and the thousand grain weight.It seemed that the yield of the rice was somehow restricted on a level of about 450 kg/667 m 2 by the combination of waterlogging and seasonal flooding.