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生态位是指在自然生态系统中生物种群在时间、空间上的位置及其与相关种群之间的功能关系,反映了物种对环境资源的需求。近年来生态位理论已广泛应用于多种生物的研究。杂草是农田生态系统的生物组分,维持适当数量的杂草对保护农田生物多样性发挥着重要作用,但杂草往往与作物竞争水、肥、光等自然资源,影响作物生长与产量。生态位宽度可以作为杂草对农田环境资源利用多样性的一种测度,反映了不同杂草在农田中的生态适应幅度。生态位
Niche refers to the temporal and spatial location of biological populations in natural ecosystems and their functional relationships with related populations, reflecting the species’ need for environmental resources. Niche theory in recent years has been widely used in a variety of biological research. Weeds are the biological components of farmland ecosystem. Maintaining the proper amount of weeds plays an important role in the conservation of farmland biodiversity. However, weeds often compete with crops for natural resources such as water, fertilizers and light and affect crop growth and yield. The niche breadth can be used as a measure of the diversity of weeds on the utilization of farmland environment resources, which reflects the ecological adaptability of different weeds in farmland. Niche