2022
DOI: 10.1590/0103-8478cr20210242
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Abstract: In this study we tested whether the root biomass of mixtures composed by grass species is greater than their respective monocultures. The treatments were monocultures of Arrhenatherum elatius, Festuca arundinacea, Dactylis glomerata, and a mixture of them, cultivated in a rich-soil environment. Root biomass was evaluated on a single evaluation per season at three soil depths (0-5, 5-10, and 10-20 cm). Mixed swards presented the greatest root biomass, and this was explained by a greater concentration in the top… Show more

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“…Such response was seen on root biomass in Summer of first year, after the high inundation occurrence in the preceding months, and higher root mass in the Fall seasons, especially in the second year (Figure 4), which was characterised by a water shortage (Figure 1). Although tall‐fescue roots are expected to be predominant in the soil profile, due to higher abundance of fescue and by its more extensive root system (Moncada et al, 2022; van Eekeren et al, 2010), the presence of other grasses could have contributed to increased total root mass. Other studies have reported forage mixtures to increase root mass at deeper layers under dry seasons as strategy to increase water uptake and sustain forage production (Skinner et al, 2006; Skinner & Comas, 2010; Skinner & Dell, 2016), but our experimental conditions reflect the opposite during the spring (i.e., high soil moisture).…”
Section: Discussionmentioning
confidence: 99%
“…Such response was seen on root biomass in Summer of first year, after the high inundation occurrence in the preceding months, and higher root mass in the Fall seasons, especially in the second year (Figure 4), which was characterised by a water shortage (Figure 1). Although tall‐fescue roots are expected to be predominant in the soil profile, due to higher abundance of fescue and by its more extensive root system (Moncada et al, 2022; van Eekeren et al, 2010), the presence of other grasses could have contributed to increased total root mass. Other studies have reported forage mixtures to increase root mass at deeper layers under dry seasons as strategy to increase water uptake and sustain forage production (Skinner et al, 2006; Skinner & Comas, 2010; Skinner & Dell, 2016), but our experimental conditions reflect the opposite during the spring (i.e., high soil moisture).…”
Section: Discussionmentioning
confidence: 99%