title: [Interference of allelopathic rice cultivars on barnyardgrass under different water irrigation and rice plant density].
abstract: Pot culture experiments were conducted to examine the effects of water irrigation and rice plant density on the interference of allelopathic rice on barnyardgrass (Echinochloa crus-galli). The results showed that under water irrigations, allelopathic rice cultivars Xiayitiao, Gumei 2 and Zhong 156 significantly reduced the plant height of barnyardgrass than non-allelopathic rice cultivars Xiushui 63 and Chunjiang 11. Barnyardgrass plants grew shorter as rice plant density increased. Allelopathic rice cultivars Jizaoxian and Gumei 2 interfered with barnyardgrass, even at their densities as low as 4 plants per pot, and the interference reduced plant height of barnyardgrass significantly compared with the non-rice control. Allelopathic rice cultivars Xiayitiao, Jizaoxian, PI312777, TN1, Gumei 2 and Zhong 156 at 32 rice plants per pot inhibited the growth of barnyardgrass significantly than Chunjiang 11.
authors.affiliation: College of Biosystem Engineering and Food Science, Zhejiang University, Hangzhou 310029, China. xzh640909@sohu.com
authors.forename: Zhenghao
authors.initials: Z
authors.lastname: Xu
authors.forename: Yong
authors.initials: Y
authors.lastname: He
authors.forename: Yiping
authors.initials: Y
authors.lastname: Wang
authors.forename: Gusong
authors.initials: G
authors.lastname: Yu
mesh_terms: D031747:Echinochloa / Q000254:growth & development*; D017753:Ecosystem; D006540:Herbicides / Q000494:pharmacology*; D012275:Oryza / Q000502:physiology*; D013045:Species Specificity
chemical_list: D006540:Herbicides