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首页> 外文期刊>Weed Research >Observed changes in soyabean growth and seed yield from Abutilon theophrasti competition as a function of carbon dioxide concentration
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Observed changes in soyabean growth and seed yield from Abutilon theophrasti competition as a function of carbon dioxide concentration

机译：观察到从白屈菜竞争中大豆生长和种子产量随二氧化碳浓度的变化

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摘要

Soyabean (Glycine max) was grown at ambient and projected levels of atmospheric carbon dioxide (+250molmol1 above ambient) over two field seasons with and without the presence of a weed, Abutilon theophrasti, to quantify the potential effect of rising atmospheric carbon dioxide concentration on weedcrop interactions and potential yield loss in soyabean. Under weed-free conditions, elevated CO2 resulted in stimulations in soyabean seed yield and associated components, including pod number. At an approximate density of 6 plants m2, A.theophrasti competition resulted in a significant reduction (40%) in soyabean seed yield. Although differences in seed yield reduction by A.theophrasti were observed as a function of year, the relative decrease in seed yield with A.theophrasti biomass did not differ in response to CO2. Although careful weed management will be necessary if CO2-induced increases in seed yield for soyabean are to be achieved, these data suggest that soyabean seed yield may be more resilient in competition with A.theophrasti as a function of rising atmospheric levels of carbon dioxide.
机译：大豆（Glycine max）在有田野和无杂草Abutilon theophrasti的情况下在两个田间环境和预计的大气二氧化碳水平（高于环境+ 250molmol1）下生长，以量化大气二氧化碳浓度升高对土壤的潜在影响大豆中的除草剂相互作用和潜在的产量损失。在无杂草的条件下，升高的CO2会刺激大豆种子产量及相关成分（包括豆荚数）。在大约6平方米的植物密度下，A.theophrasti竞争导致大豆种子产量大幅下降（40％）。尽管观察到了按每年甲虫的减产的差异，这是一年的函数，但甲虫生物量的相对减产对二氧化碳的响应没有差异。尽管要实现CO2诱导的大豆种子产量增加，必须进行仔细的杂草处理，但这些数据表明，随着大气中二氧化碳水平的升高，大豆种子产量在与A.theophrasti的竞争中可能更具弹性。

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