帮我翻译：研究两种基因型菵草在早期生长阶段及营养生长阶段的株高及地上部生物量、成熟期的繁殖力、与小麦竞争能力的差异以期明确没有除草剂选择压力下该位点突变对菵草生长的影响

Research was conducted to investigate the differences in plant height, above-ground biomass, reproductive ability at maturity, and competitive ability with wheat between two genotypes of barnyard grass during the early growth stage and nutritional growth stage. The aim was to clarify the impact of a mutation at this site on the growth of barnyard grass under the absence of herbicide selection pressure.