早熟和晚熟藜麦材料的生长特征差异分析OA

[Objective]Chenopodium quinoa,an annual herbaceous plant belonging to the Amaranthaceae fam-ily,is characterized by its significant aboveground dry matter accumulation and feeding potential.The significant changes in quinoa plant height reflect the accumulation of aboveground dry matter.This study aims to explore the growth characteristics of quinoa through continuous monitoring of plant height,and to elucidate the mechanisms un-derlying differences in aboveground growth patterns between early-and late-maturing varieties.[Method]Four early-maturing and four late maturing quinoa cultivars were selected for analysis.Diurnal and nocturnal height dynamics of spikes and stems were continuously monitored for each cultivar.A logistic growth model was employed to fit plant height data and analyze growth patterns across different varieties.Daily plant height increment,diurnal and nocturnal growth differences,and intraday changes in stem and spike height were compared.[Result]Late-maturing Chenopo-dium quinoa cultivars exhibited significantly greater final plant height than early-maturing varieties.These cultivars also displayed a longer rapid growth period and higher daily growth rates.Growth more pronounced at night than dur-ing the day.Additionally,spikes and stems showed asynchronous growth patterns,with spikes elongating as stem growth stabilized.Differences in plant height between early-and late-maturing cultivars were primarily attributable to variation in stem height.[Conclusion]Late-maturing quinoa cultivars achieve greater aboveground biomass accumula-tion mainly by prolonging the rapid growth phase and increasing daily plant height increments during this critical pe-riod.