再生稻丰两优香1号头季稻倒伏原因浅析

A brief analysis on the reasons of lodging in the first season of ratooning rice variety Fengliangyouxiang No.1

湖北省当阳市水稻再生稻面积已由点片种植向成片发展,两河镇胡场村五组连片种植的再生稻品种丰两优香1号头季稻进入黄熟期即收获前15d左右,出现由北向南向一侧全部覆地倒伏,经过实地调查,对连片倒伏田块和连片未倒伏田块的植株进行了测量和分析。结果表明,倒伏与栽培方式有关,即抛秧栽培易引起倒伏,机插秧相对抗倒。倒伏的发生主要与根颈粗度、地上伸长节间数、穗粒数等因素有直接关系。

Ratooning rice in Dangyang city, Hubei province, has been developed fromspot planting to adult planting. Ratooning rice variety Fengliangyouxiang No.1 has appeared lodging with all of plants fell on the ground from north to south side when rice was into yellow ripeness stage(15 days before harvest) in five groups of Huyang village, Lianghe Town. Through field investigation, the characters of plants in lodging field and unlodgingfield were measured and analyzed. The results showed that lodging was related to cultivation pattern, throwing transplantation caused lodging easily, and machine planting was resistant to lodging. The occurrence of lodging was directly related to the root neck thickness, the number of overground elongation joints, the number of grains per spike and other factors.