B803A系列水稻品种抗倒伏特性研究

Study on the culm lodging resistance of the hybrid rice of B803A

选用4个B803A系列(以下简称B优系列)水稻品种与重穗型品种冈优725以及中穗型品种Ⅱ优838进行抗倒伏比较研究。通过对抗折力、弯曲力矩、倒伏指数、节间长度和厚度的测定和分析,得出B优系列品种抗折力与冈优725相近,但弯曲力矩小于冈优725,故倒伏指数小于冈优725;栽培上可通过降低基部节间长度,提高茎秆干物质含量等技术措施来增强植株的抗倒伏能力,从而达到高产、稳产的目的。

The resistance to lodging of rice varietyies ,including 4 B803A series , heavy panicle type Gangyou725 and medium panicle type Ⅱ you838 was compared. The results showed that the resistance to fracture of B803A series was close with that of Gangyou725 and the bending moment of B803A series was smaller than that of Gangyou725, so the lodging index of B803A series was less than that of Gangyou725. Based on the analysis above, the resistance to lodging of B803A series could be increased and the aim of high and stability yield could realize by reducing bascal intemode length and improving the content of dry matter in stalk etc.