不同水肥条件下两个燕麦品种的竞争关系  

The competitive relationship of two oat varieties under different water and fertilization conditions

作　　者：杜京旗[1] 杨卫民[1] 李刚[2] 宋丽[1] 刘旭丽[1] 白连梅 刘琴琴[1] 

机构地区：[1]吕梁学院植物化学研究所,山西吕梁033000 [2]山西省农业科学院高寒区作物研究所,山西大同037000

出　　处：《生态学杂志》2017年第2期420-427,共8页Chinese Journal of Ecology

基　　金：山西省自然科学基金项目(2013011029-1);吕梁学院自然科学校内基金项目(ZRQN201401)资助

摘　　要：采用de Wit取代系列法,探究了不同水肥条件下两个燕麦品种"定燕1号"和"晋燕17号"的竞争关系。结果表明:所有水肥处理中,"晋燕17号"的竞争能力强于"定燕1号";低水低肥和高水高肥条件下,"晋燕17号"的地上生物量高于"定燕1号";随着水肥梯度增加,"定燕1号"和"晋燕17号"的地上生物量中茎比重均增加,叶比重均减少;所有处理中,"晋燕17号"的单播产量和收获指数均高于"定燕1号";"晋燕17号"通过提高地上生物量和收获指数达到高产的目的。竞争能力和收获指数的同步提高有望成为干旱区作物育种的一个关注焦点。A de Wit replace series experiment was used to explore the competitive relationship of two oat varieties of Dingyan 1 and Jinyan 17 under different levels of water and fertilizer application. The results showed that Jinyan 17 had greater competitiveness than Dingyan 1 under a series of water and fertilization conditions. Under low water ＋ fertilization or sufficient water ＋ fertilization, the aboveground biomass of Jinyan 17 was significantly higher than that of Dingyan 1. With the increasing levels of water and fertilization, the ratio of stem biomass to aboveground biomass of Dingyan 1 and Jinyan 17 increased, and the ratio of leaf biomass to aboveground biomass of both oat varieties decreased. In all treatments, grain yield in monoculture and harvest index of Jinyan 17 were greater than those of Dingyan 1. By simultaneous increase of aboveground biomass and harvest index, Jinyan 17 obtained higher grain yield. The synchronous improvement of competitive ability and harvest index is expected to become the focus of crop breeding in arid areas.

关 键 词：水肥条件 竞争关系 燕麦品种 生物量分配 

分 类 号：S512.6[农业科学—作物学]