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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。
By using de Wit instead of serial method, the competition relationship between two oat cultivars “Ding Yan 1 ” and “Jin Yan 17 ” under different water and fertilizer conditions was explored. The results showed that in all water and fertilizer treatments, the competition ability of “Jinyan 17” was stronger than that of “Dingyan 1”; under the conditions of low water, low fertilizer and high water and high fertilizer, “Jin Yan 17” Of aboveground biomass was higher than that of “Dingyan 1”. With the increase of water and fertilizer gradient, the proportion of stems in above-ground biomass of “Dingyan 1” and “Jinyan 17” both increased, leaf specific gravity The unicast yield and harvest index of “Jin Yan 17” were higher than that of “Ding Yan 1” and “Jin Yan 17”, respectively. By increasing aboveground biomass and harvest index To achieve the purpose of high yield. The simultaneous improvement of competitiveness and harvest index is expected to be a focus of crop breeding in arid regions.