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Efecto de la profundidad de siembra en la emergencia de especies pratenses

Authors: Vázquez de Aldana, Beatriz R.; García Ciudad, Antonia; Álvarez Pascua, Amador; García Criado, Balbino;

Efecto de la profundidad de siembra en la emergencia de especies pratenses

Abstract

La emergencia es un proceso de gran importancia en el éxito de la implantación de especies herbáceas en los ecosistemas de pastizal; un proceso regulado por varios factores ambientales como la luz, temperatura, pH del suelo y humedad. Sin embargo, hay otros factores como la profundidad a los que se ha prestado menor atención. El objetivo de este trabajo fue determinar el efecto de la profundidad de la siembra en la emergencia de 14 especies pratenses: Agropyron cristatum, Anthyllis vulneraria, Dactylis glomerata, Festuca ovina, Festuca rubra, Lotus corniculatus, Phleum pratense, Plantago lanceolata, Poa pratensis, Trifolium repens, Trifolium subterraneum, Medicago sativa, Melilotus officinalis y Onobrychis vicifolia en condiciones controladas de invernadero. Los resultados obtenidos muestran la gran importancia que tiene la profundidad de siembra de la semilla: en todas las especies, al aumentar la profundidad de siembra disminuye considerablemente el porcentaje final de emergencia de plántulas. Se encontró una correlación significativa negativa entre la diferencia del porcentaje de emergencia con la profundidad y el tamaño de la semilla. Además, la profundidad de siembra también afectó al crecimiento de las plantas, principalmente a la longitud del tallo (que aumenta) y al peso seco de la raíz (que disminuye) al aumentar la profundidad.

Seed germination is a key event in determining the success of herbaceous species in grassland ecosystems; a process regulated by several environmental factors such as light, temperature, soil pH and moisture. However, there are other factors like seed depth which has been less considered. The aim of this work was to determine the effect of seed depth on seedling emergence of 14 grassland species: Agropyron cristatum, Anthyllis vulneraria, Dactylis glomerata, Festuca ovina, Festuca rubra, Lotus corniculatus, Phleum pratense, Plantago lanceolata, Poa pratensis, Trifolium repens, Trifolium subterraneum, Medicago sativa, Melilotus officinalis and Onobrychis vicifolia. The results show the great importance of the seed depth: the percentage of emergence of all species notably decreased by increasing seed depth. A significant negative correlation between the difference in emergence percentage with depth and the seed size was found. Furthermore, seed depth affected plant growth parameters such as root dry weight and length of stems.

Este trabajo ha sido subvencionado por la empresa PAS Infraestructura y Servicios S.L.

9 páginas. -- Trabajo generado en la 50ª Reunión Científica de la SEEP

Peer reviewed

Country
Spain
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Keywords

Germinación, Leguminosas, Gramíneas, Semillas, Crecimiento raíz

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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