Straw interference in the emergence of talquezal seeds from different origins

Abstract

HIGHLIGHTS Seeds from Rondonópolis-MT have lower weight and higher viability.  Urochloa brizantha straw influences the emergence pattern of Paspalum virgatum seedlings.  Amounts of straw higher than 4.0 ton ha -1 negatively affect the emergence of P. virgatum seedlings.

Pasture weed biology and management in Brazil

“…Furthermore, the emergence of seedlings from seeds with a small reserve may be impaired because the plant may not cross the deposited straw (Gomes, Bevilaqua, Silva, & Monquero, 2014). Marchi, Marques, Souza, Justo and Martins (2020), conducted a study in Barra do Garças, MT, and reported that seeds of Paspalum virgatum L. (sword grass), considered one of the main species of pasture weed in the center-western and northern regions of Brazil, have high vigor in seedling emergence provided they receive only an amount of B. brizantha straw less than 4.0 t ha-1. Because of this, the researchers suggested that the greater the amount of straw covering the seed, the lower the percentage of seedling emergence, thereby making cutting and leaving straw an effective method to control monocotyledonous weeds in pastures.…”

Light intensity and sowing depth on the emergence and development of weeds

“…Moreover, the full sunlight condition provided E. heterophylla plants with better conditions for their development after emergence. Due to this, it is worthy to mentioning that the use of cultural treatments that promote reduction of solar radiation can be effective in controlling weed growth and development (Marchi et al, 2020), like E. heterophylla.…”

“…One of the highest limitations for implementing a weed management program is the lack of knowledge on the biology and ecology of the main species (Ramesh et al, 2017). Thus, some studies have been developed aiming at a better understanding of the growth and development of these plants for their effective management (Marchi et al, 2020).…”

“…It should be noted that solar radiation is an important environmental component that provides light energy for photosynthesis and provides environmental signals for a series of physiological processes in plants that can differ depending on the plant species (Marchi et al, 2020). The reduction in light intensity and, consequently, temperature culminates in a decrease in the accumulation of degree-days by the plant, which directly influences plant phenology and morphogenesis.…”

Morphoanatomical characterization to differentiate two biotypes of Paspalum virgatum

“…Because of the great competition posed by weeds, several studies have been developed in order to provide further insights into the behavior of these biotypes (Marques et al, 2019;Marchi et al, 2020). Given the above, the objective of this research was to differentiate two biotypes of P. virgatum based on the main aspects of leaf morphology and anatomy.…”