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首页> 外文期刊>Archives of Agronomy and Soil Science >Planting date, row configuration and plant population effects on growth and yield of dryland sorghum in subtropical South Texas
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Planting date, row configuration and plant population effects on growth and yield of dryland sorghum in subtropical South Texas

机译：亚热带南德克萨斯州的种植日期，行结构和植物种群数量对旱地高粱生长和产量的影响

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摘要

Grain sorghum is well adapted to semi-arid environments, but production practices must be optimized. A four-year study was conducted to determine the effects of planting date, row configuration and plant population on dryland sorghum growth and yield in subtropical South Texas. The earliest possible planting in order to take advantage of favorable growing conditions without being exposed to adverse environmental conditions was found to produce the best yields. While row configurations which provide the most equidistance spacing for plants produced the highest leaf area index, narrower 76 cm rows planted either single or double row produced the best plant growth and grain yield most years. Studies have suggested that when soil moisture is limited, configurations which limit biomass production would conserve moisture for grain production resulting in improved grain yields. However, in this study configurations that caused the greatest plant dry weight resulted in the best grain yields. Rainfall before or during grainfill may have compensated for any reductions in water availability. Different plant populations within the range of 173-272 × 1000 ha−1 had no effect on sorghum yields, confirming the ability of this crop to compensate for changes in available space.
机译：高粱谷物非常适合半干旱环境，但是必须优化生产实践。进行了为期四年的研究，以确定南亚德克萨斯州亚热带地区种植日期，行型和植物种群对旱地高粱生长和产量的影响。人们发现，为了利用有利的生长条件而不暴露于不利的环境条件，尽早播种可产生最佳产量。虽然为植物提供最大等距间距的行配置产生了最高的叶面积指数，但单行或双行种植的76厘米较窄的行在大多数年份中都具有最佳的植物生长和谷物产量。研究表明，当土壤水分受到限制时，限制生物量生产的配置将为谷物生产节省水分，从而提高谷物产量。但是，在这项研究中，导致最大植物干重的配置导致了最佳的谷物产量。谷物灌装之前或期间的降雨可能弥补了水供应量的减少。 173-272±1000 ha â1范围内的不同植物种群对高粱产量没有影响，证实了该作物补偿可用空间变化的能力。

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