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为探明作物是否具有识别邻株身份的能力以及这种能力是否受到环境因子的调控,通过大田试验,研究邻株身份(亲缘株、非亲缘株和陌生株)、种植密度和土壤养分水平的交互效应对谷子(Setaria italica)地上部分生物量分配的影响。结果表明,谷子与亲缘株为邻时的净繁殖生物量分配和种子生物量分配,比与非亲缘株为邻时显著提高,且营养生物量分配显著降低(P<0.05)。在高种植密度条件下,亲缘组谷子的穗长、净繁殖生物量分配和种子生物量分配显著大于非亲缘组,而营养生物量分配显著小于非亲缘组(P<0.05)。随着土壤养分水平提高,亲缘组谷子的种子生物量分配显著增加,营养生物量分配显著减少(P<0.05)。由此推断,谷子具有对亲缘邻株的识别能力,且这种能力受种植密度和土壤养分水平的调控,在高种植密度和高土壤养分水平条件下,谷子的亲缘邻株识别能力较强。
In order to find out whether the crop has the ability to identify the neighboring plants and whether this ability is regulated by the environmental factors, the adjacent plants (relatives, unrelated and unfamiliar), planting density and soil nutrient level Effect of Interaction on Biomass Allocation of Aboveground Parts of Setaria italica. The results showed that net reproductive biomass allocation and seed biomass allocation of millet to neighbors with relatives were significantly higher than those from non-relatives, and the distribution of vegetative biomass was significantly decreased (P <0.05). Under high planting density, the spike length, net reproductive biomass allocation and seed biomass allocation of relatives were significantly greater than those of non-relatives, while the distribution of vegetative biomass was significantly less than that of non-relatives (P <0.05). With the increase of soil nutrient level, the seed biomass distribution of relatives increased significantly and the allocation of nutrient biomass decreased significantly (P <0.05). Therefore, it is concluded that millet has the ability to recognize relatives and its ability is controlled by planting density and soil nutrient level. Under the condition of high plant density and high soil nutrient level, millet relatives have strong ability to recognize relatives.