Horse purslane (Trianthema portulacstrum L.) is an important weed of soybean crop capable of causing significant yield reduction. Therefore, this study assessed the impact of horse purslane and other weeds' infestation on the productivity of soybean. Ten treatments, i.e., weed-free throughout the growing season, horse purslane-free till 20, 40 and 60 days after emergence (DAE), all weeds-free till 20, 40 and 60 DAE, weedy-check (excluding horse purslane), weedy-check (horse purslane alone) and weedy-check (all weeds) were included in the study. Data relating to density and dry weight of recorded weed species, and yield and related traits of soybean were recorded. Overall, infestation percentage of horse purslane was 33.10 and 51%, whereas dry weight was 12 and 44 g m-2 during 1st and 2nd year, respectively. The highest dry weight of all weed species was recorded at 45 DAE in weedy-check all weeds treatment during both years. The lowest relative density and frequency of horse purslane were recorded in the treatment where it was controlled until 20 DAE during 2018 at 30 DAE, whereas the same treatment recoded the lowest density of horse purslane at 45 DAE during 2019. The relative frequency of horse purslane was non-significant for weedy-check horse purslane and weedy-check all weeds treatments during 2018, whereas former treatment had higher relative frequency of horse purslane in weedy-check all weeds than the later during 2019. Yield and related traits significantly differed among different treatments used in the study. The treatment all weeds controlled until 40 DAE recorded higher number of pods per plant, 1000-seed weight and seed yield during both years. The yield reduction in weedy-check treatments was; weedy-check all weeds > weedy-check all weeds except horse purslane > weedy-check horse purslane only. It is concluded that horse purslane was not the sole weed interfering soybean fields and weed flora consisted of false amaranth [Digera muricata (L.) Mart.] and purple nut sedge (Cyperus rotundus L.). Hence, if the soybean fields in northern irrigated plains of Pakistan are infested with horse purslane or heavily infested with horse purslane or other weeds, these should be controlled in initial 40 DAE to improve soybean productivity.

中文翻译：

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马齿苋 (Trianthema portulacastrum L.) 侵染对巴基斯坦北部灌溉平原大豆 [Glycine max (L.) Merrill] 生产力的影响。

马齿苋(Trianthema portulacstrum L.) 是一种重要的大豆作物杂草，能够导致显着减产。因此，本研究评估了马齿苋和其他杂草侵染对大豆生产力的影响。十个处理，即整个生长季除草，马齿苋除草至出苗后20、40和60天（DAE），所有杂草除草至DAE 20、40和60天，杂草检查（不包括马齿苋） , 杂草检查（仅马齿苋）和杂草检查（所有杂草）被纳入研究。记录了与记录的杂草种类的密度和干重以及大豆的产量和相关性状有关的数据。总体而言，马齿苋的侵染率为 33.10% 和 51%，而第 1 年和第 2 年的干重分别为 12 和 44 g m-2。在 weedy-check 所有杂草处理中，所有杂草物种的最高干重记录在 45 DAE。马齿苋的最低相对密度和频率在 2018 年控制到 20 DAE 的处理中记录为 30 DAE，而同一处理在 2019 年将马齿苋的最低密度记录为 45 DAE。马齿苋的相对频率2018年除草处理马齿苋和除草所有杂草处理不显着，而2019年前处理马齿苋在除草所有杂草中的相对频率高于后期处理。研究中使用的治疗方法。处理所有杂草直到 40 DAE 记录了每株植物的更多豆荚数，这两年的千粒重和种子产量。杂草检查处理的减产是；除草-检查所有杂草>除草-检查除马齿苋以外的所有杂草>除草-仅检查马齿苋。得出的结论是，马齿苋不是唯一干扰大豆田的杂草，杂草群包括假苋菜 [Digera muricata (L.) Mart.] 和紫莎草 (Cyperus rotundus L.)。因此，如果巴基斯坦北部灌溉平原的大豆田被马齿苋或其他杂草严重侵染，则应在最初的 40 DAE 中控制这些杂草以提高大豆产量。得出的结论是，马齿苋不是唯一干扰大豆田的杂草，杂草群包括假苋菜 [Digera muricata (L.) Mart.] 和紫莎草 (Cyperus rotundus L.)。因此，如果巴基斯坦北部灌溉平原的大豆田被马齿苋或其他杂草严重侵染，则应在最初的 40 DAE 中控制这些杂草以提高大豆产量。得出的结论是，马齿苋不是唯一干扰大豆田的杂草，杂草群包括假苋菜 [Digera muricata (L.) Mart.] 和紫莎草 (Cyperus rotundus L.)。因此，如果巴基斯坦北部灌溉平原的大豆田被马齿苋或其他杂草严重侵染，则应在最初的 40 DAE 中控制这些杂草以提高大豆产量。