Jiang Zhi-Lin, Wang Wu-Yun, Lei Gui-Sheng, Gui Fu-Rong, Liu Wan-Xue, Li Zheng-Yue
Ying Yong Sheng Tai Xue Bao. 2014 Oct;25(10):2833-9.
A field experiment was conducted to explore the root competitive effects of Ageratina adenophora and Setaria sphacelata, S. yunnanensis, Eupatorium fortunei, Chenopodium serotinum in monoculture and mixture, and the relative competitive abilities were evaluated. The results showed that the root length, superficial area and volume of A. adenophora in mixture were lower than in monoculture, but those of S. sphacelata were higher in mixture than in monoculture. The biomass of A. adenophora in mixture decreased by 77.1% and that of S. sphacelata increased by 80.4% compared with those in monoculture. The relative yield and competitive balance index of S. sphacelata were significantly higher than those of A. adenophora, and the relative yield was about 1.0, suggesting that the underground competitive ability of S. sphacelata was higher than A. adenophora. The root morphology of S. yunnanensis in monoculture and mixture was higher than those of A. adenophora, but the root morphology of two species in mixture was lower than in monoculture. The biomass of A. adenophora and S. yunnanensis in mixture decreased by 45.3% and 22.8% compared with those in monoculture, respectively. Competition effect parameters showed that A. adenophora was a mutual antagonism with S. yunnanensis. The root morphology of E. fortunei and A. adenophora in mixture showed no significant difference compared with that in monoculture. The biomass of A. adenophora and E. fortunei was lower than that in monoculture, respectively. Competition effect parameters showed that A. adenophora was a superior competitor. In the mixture of A. adenophora and C. serotinum, the root morphology parameters and competitive ability of A. adenophora were superior to those of C. serotinum. Above all, S. sphacelata is a preference plant material to control the A. adenophorum invasion and recover biodiversity in A. adenophorum invasion fields.
开展了一项田间试验，以探究紫茎泽兰与皱叶狗尾草、云南狗尾草、佩兰、龙葵在单作和混作时的根系竞争效应，并评估其相对竞争能力。结果表明，紫茎泽兰在混作时的根长、表面积和体积均低于单作，但皱叶狗尾草在混作时高于单作。与单作相比，紫茎泽兰在混作时的生物量下降了77.1%，而皱叶狗尾草的生物量增加了80.4%。皱叶狗尾草的相对产量和竞争平衡指数显著高于紫茎泽兰，且相对产量约为1.0，表明皱叶狗尾草的地下竞争能力高于紫茎泽兰。云南狗尾草在单作和混作时的根系形态均高于紫茎泽兰，但两种植物在混作时的根系形态低于单作。与单作相比，紫茎泽兰和云南狗尾草在混作时的生物量分别下降了45.3%和22.8%。竞争效应参数表明，紫茎泽兰与云南狗尾草相互拮抗。佩兰和紫茎泽兰在混作时的根系形态与单作相比无显著差异。紫茎泽兰和佩兰的生物量分别低于单作。竞争效应参数表明，紫茎泽兰是优势竞争者。在紫茎泽兰与龙葵的混作中，紫茎泽兰的根系形态参数和竞争能力优于龙葵。综上所述，皱叶狗尾草是控制紫茎泽兰入侵和恢复紫茎泽兰入侵地生物多样性的优选植物材料。
