The physiological and growth response of Acacia caven under water stress and the application of different levels of biosolids

Acacia caven (Mol.) Mol. (Leguminosae), generally known as "espino," is one of the most common tree species in the Mediterranean region of Chile. This species grows in nutritionally poor soils with low water availability during the summer, so it is very difficult for new seedlings to becom...

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Autores principales:	Donoso,Sergio, Peña-Rojas,Karen, Pacheco,Cristian, Durán,Sergio, Santelices,Rómulo, Mascaró,Cristóbal
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal 2015
Materias:	Biomass predawn water potential photosynthesis shoot:root ratio water restriction
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202015000200013
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spelling	oai:scielo:S0718-162020150002000132015-09-16The physiological and growth response of Acacia caven under water stress and the application of different levels of biosolidsDonoso,SergioPeña-Rojas,KarenPacheco,CristianDurán,SergioSantelices,RómuloMascaró,Cristóbal Biomass predawn water potential photosynthesis shoot:root ratio water restriction Acacia caven (Mol.) Mol. (Leguminosae), generally known as "espino," is one of the most common tree species in the Mediterranean region of Chile. This species grows in nutritionally poor soils with low water availability during the summer, so it is very difficult for new seedlings to become established. To investigate the effects of water restriction and the potential benefit of the application of biosolids (sludge bio-dried to 25% moisture) on the growth of the plant, a completely random, two x three factorial design was carried out in controlled nursery conditions under two irrigation regimes (well-watered plants and controlled water restriction) and three biosolid application rates (0:100, 10:90 and 20:80) in a clay substrate. Physiological evaluations (predawn water potential, photosynthesis and gas exchange) were performed at representative times along the water restriction gradients and supplemented with measurements of growth and biomass distribution. Once plants entered the water restriction phase, those in the biosolid-treated substrate exhibited better hydration compared to plants in the untreated substrate. This was attributed to the increased organic matter content as well as to changes in the textural characteristics of the original substrate that increased its capacity to deliver water to the plants. Additionally, the application of biosolids promoted shoot and leaf growth in well-watered plants, increasing the shoot:root ratio, which could be a disadvantage under water stress.info:eu-repo/semantics/openAccessPontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería ForestalCiencia e investigación agraria v.42 n.2 20152015-08-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202015000200013en10.4067/S0718-16202015000200013
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Biomass predawn water potential photosynthesis shoot:root ratio water restriction
spellingShingle	Biomass predawn water potential photosynthesis shoot:root ratio water restriction Donoso,Sergio Peña-Rojas,Karen Pacheco,Cristian Durán,Sergio Santelices,Rómulo Mascaró,Cristóbal The physiological and growth response of Acacia caven under water stress and the application of different levels of biosolids
description	Acacia caven (Mol.) Mol. (Leguminosae), generally known as "espino," is one of the most common tree species in the Mediterranean region of Chile. This species grows in nutritionally poor soils with low water availability during the summer, so it is very difficult for new seedlings to become established. To investigate the effects of water restriction and the potential benefit of the application of biosolids (sludge bio-dried to 25% moisture) on the growth of the plant, a completely random, two x three factorial design was carried out in controlled nursery conditions under two irrigation regimes (well-watered plants and controlled water restriction) and three biosolid application rates (0:100, 10:90 and 20:80) in a clay substrate. Physiological evaluations (predawn water potential, photosynthesis and gas exchange) were performed at representative times along the water restriction gradients and supplemented with measurements of growth and biomass distribution. Once plants entered the water restriction phase, those in the biosolid-treated substrate exhibited better hydration compared to plants in the untreated substrate. This was attributed to the increased organic matter content as well as to changes in the textural characteristics of the original substrate that increased its capacity to deliver water to the plants. Additionally, the application of biosolids promoted shoot and leaf growth in well-watered plants, increasing the shoot:root ratio, which could be a disadvantage under water stress.
author	Donoso,Sergio Peña-Rojas,Karen Pacheco,Cristian Durán,Sergio Santelices,Rómulo Mascaró,Cristóbal
author_facet	Donoso,Sergio Peña-Rojas,Karen Pacheco,Cristian Durán,Sergio Santelices,Rómulo Mascaró,Cristóbal
author_sort	Donoso,Sergio
title	The physiological and growth response of Acacia caven under water stress and the application of different levels of biosolids
title_short	The physiological and growth response of Acacia caven under water stress and the application of different levels of biosolids
title_full	The physiological and growth response of Acacia caven under water stress and the application of different levels of biosolids
title_fullStr	The physiological and growth response of Acacia caven under water stress and the application of different levels of biosolids
title_full_unstemmed	The physiological and growth response of Acacia caven under water stress and the application of different levels of biosolids
title_sort	physiological and growth response of acacia caven under water stress and the application of different levels of biosolids
publisher	Pontificia Universidad Católica de Chile. Facultad de Agronomía e Ingeniería Forestal
publishDate	2015
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202015000200013
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The physiological and growth response of Acacia caven under water stress and the application of different levels of biosolids

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