Transplanting Shock and Water Relations in Urban Tree Species

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 540b-540
Author(s):  
Amy J. Barton ◽  
Christopher S. Walsh
Keyword(s):  
Leaf Area ◽  
Early Spring ◽  
Area Index ◽  
Notable Effect ◽  
Water Potentials ◽  
Open Canopy ◽  
Transplanting Shock ◽  
Pressure Bomb ◽  
Water Potential Measurements ◽  
Acer Ginnala

Large-caliper trees transplanted into urban settings show low survivability. A 1-year transplanting experiment was conducted using Acer ginnala and Acer truncatum. Trees were blocked by species and size, with three blocks of four trees per species. Three trees of each species were left in their original location for purpose of comparison. A 2 × 2 factorial was used to assign treatments (water, water and top prune, top prune, and transplanted control). Using a Schollander Pressure Bomb, predawn and midday water potential measurements were recorded biweekly from early May through September. The first 8 weeks following transplant, all transplanted trees of both species had significantly (P ≥ 0.05) more negative midday water potentials than those not transplanted. During periods of stress, predawn water potentials of transplanted trees did not recover overnight. By September, irrigated trees had water potentials not significantly different from those of trees not transplanted. Canopy closure was measured on the same schedule using a Li-Cor Canopy Analyzer. Leaf area index of transplanted trees was nearly half that of non-transplanted trees. Trees treated with water did have slight, but significantly greater leaf area indexes than those of other treatments. It appears that the most notable effect of transplanting is the inhibition of leaf expansion resulting from early spring water stress. This leads to an open canopy for the whole season following transplant.

scholarly journals ANÁLISE DE CRESCIMENTO EM CLONES DE EUCALIPTO SUBMETIDOS A ESTRESSE HÍDRICO

Irriga ◽  
2010 ◽  
Vol 15 (1) ◽  
pp. 98-110 ◽  
Author(s):  
Maria Renata Rocha Pereira ◽  
Guilherme Sasso Ferreira Souza ◽  
Andreia Cristina Peres Rodrigues ◽  
Andre Luiz Melhorança Filho ◽  
Antonio Evaldo Klar
Keyword(s):  
Soil Water ◽  
Leaf Area ◽  
Genetic Material ◽  
Area Index ◽  
Growth Ratio ◽  
Relative Growth ◽  
Water Potentials ◽  
Absolute Growth ◽  
Hydric Stress ◽  
East West

O estudo objetivou avaliar o desempenho de genótipos de plantas de Eucalyptus urograndis (clone 105 e 433) em relação à tolerância à seca, considerando a análise de crescimento das plantas. Para tanto, plantas foram cultivadas em vasos de 8 litros em casa de vegetação. O delineamento foi em inteiramente casualizado, com quatro tratamentos contendo desesseis repetições. O manejo hídrico foi estabelecido com base em dois potenciais mínimos de água (Ψ): -0,03 e -1,5 MPa, através da pesagem diária dos vasos. O desenvolvimento das plantas foi avaliado em coletas a intervalos de 15 dias, iniciando no momento de plantio da muda no vaso até os 60 dias após plantio. Considerando-se o acúmulo de matéria seca total (MS) e o índice de área foliar da planta (IAF) como base para a determinação dos seguintes índices fisiológicos: razão de área foliar (RAF), taxa assimilatória líquida (TAL), área foliar específica (AFE), taxa de crescimento relativo (TCR) e taxa de crescimento absoluto (TCA). Nas condições do experimento, o clone 105 apresentou menor sensibilidade ao déficit hídrico, o que o qualifica como material genético promissor para ambientes sujeitos a estiagem prolongada. Já em condições em que não há restrição hídrica, os dois clones tiveram comportamento semelhantes.   UNITERMOS: Eucaliptus urograndis, índices fisiológicos, potenciais hídricos do solo     PEREIRA, M. R. R.; SOUZA, G. S. F. de; RODRIGUES, A. C. P.; MELHORANÇA FILHO, A. L.; KLAR, A. E. GROWTH ANALYSIS OF CLONE EUCALIPTUS UNDER HYDRIC STRESS     2 ABSTRACT   The aim of this study was to evaluate Eucaliptus grandis genotypes (Clones 105 and 433) in relation to drought  tolerance, through growth plant analysis.  Black PVC pots with 10 liter volume were used for cultivate plants in polyethilene greenhouse oriented east/west. Completely randonmized design with four treatments was used: two clones and two minimum soil water  potentials ( - 0.03 and -1,5 MPa) and sixteen replicates.  Pots were weighed daily in order to evaluate water content and characteristic soli water curve was determined. Plant development was obtained each 15 days from planting until 60 days  through  total dry matter (DM), leaf area index (LAI),  leaf area ratio (LAR), net assimilative ratio (NAR), specific leaf area (SLA), relative growth ratio (RGR) and absolute growth ratio (AGR). Results showed that clone 105 presented less sensibility to water deficit, which qualify it as genetic material for use under dry soil conditons.  On the other hand, both clones had similar behavior with no water restrictions.   KEYWORDS: Eucaliptus grandis, soil water potentials, morphologic measurements.  

scholarly journals Components of the leaf area index of marandu palisadegrass swards subjected to strategies of intermittent stocking

2009 ◽  
Vol 66 (6) ◽  
pp. 721-732 ◽  
Author(s):  
Alessandra Aparecida Giacomini ◽  
Sila Carneiro da Silva ◽  
Daniel Oliveira de Lucena Sarmento ◽  
Cauê Varesqui Zeferino ◽  
Júlio Kuhn da Trindade ◽  
...  
Keyword(s):  
Leaf Area Index ◽  
Leaf Area ◽  
Specific Leaf Area ◽  
Management Practices ◽  
Block Design ◽  
Early Spring ◽  
Light Interception ◽  
Area Index ◽  
Early Return ◽  
Index Site

Leaf area index is the main sward characteristic related to the processes of light interception and competition in plant communities. The objective of this experiment was to quantify and evaluate the composition of the leaf area on tillers of marandu palisadegrass (Brachiaria brizantha cv. Marandu) subjected to strategies of intermittent stocking. The experiment was carried out in Piracicaba, state of São Paulo, Brazil, from October/2004 to December/2005. Swards were grazed at 95 and 100% canopy light interception (LI) to post-grazing heights of 10 and 15 cm, following a 2 ' 2 factorial arrangement with four replications in a randomised complete block design. Estimates were made of sward leaf area index, site filling, specific leaf area and the dimensionless ratio between tiller leaf area and volume (R), as well as the relative contribution of basal and aerial tillers to these variables. In early spring, values of leaf area index and specific leaf area were low when compared to the other seasons, and swards grazed at 95% LI presented higher site filling and specific leaf area than those grazed at 100% LI. This resulted in higher tillering activity and increase in leaf area index in late spring, indicating quick recovery and early return of swards grazed at 95% LI to growing conditions. Aerial tillers corresponded to an important morphological adaptation of marandu palisadegrass to increase its competitive ability. Treatment 100/10 resulted in the highest and 95/15 in the lowest R values throughout the experiment, suggesting an allometric pattern of growth of tillers during regrowth in order to compensate low tiller population and optimise the leaf area index. Grazing management practices can benefit from this knowledge by promoting ideal sward conditions to maximise and accelerate growth.

scholarly journals The Effect of Plant Pruning on the Light Conditions and Vegetative Development of Eggplant (Solanum Melongena L.) in Greenhouse Cultivation

2008 ◽  
Vol 68 (1) ◽  
pp. 57-70 ◽  
Author(s):  
Anna Ambroszczyk ◽  
Stanisław Cebula ◽  
Agnieszka Sękara
Keyword(s):  
Leaf Area ◽  
Solanum Melongena ◽  
Early Spring ◽  
Light Conditions ◽  
Vegetative Development ◽  
Area Index ◽  
Mass Unit ◽  
Leaf Area And Thickness ◽  
Greenhouse Cultivation ◽  
Pruning Methods

The Effect of Plant Pruning on the Light Conditions and Vegetative Development of Eggplant (Solanum MelongenaL.) in Greenhouse CultivationThe aim of the present investigations was to find the relations between pruning methods and chosen parameters of vegetative eggplant development in greenhouse conditions. The plant shape modifies the photosynthetically active radiation (PAR) conditions in the plant profile. Independence between different pruning methods and vegetative plant development particularly leaves characteristics as well as pigments and photosynthesis products content in leaves was stated. The investigations were carried out in 1999-2001 in the experimental greenhouse of Agricultural University in Kraków, Poland. Eggplant of Tania F1hybrid was used in the early spring-summer production in a heated greenhouse. The following pruning systems were applied: pruning to one shoot with leaving on every node 2 fruit sets and 1, 2 or 3 leaves, and pruning to two shoots with leaving on every node 1 fruit set and 1, 2 or 3 leaves. With the introduction of a greater number of leaves and fruit sets on eggplant shoots irradiation in plant profile was reduced. The value of leaf area index (LAI) depended on the way of pruning. Chemical composition of leaves was slightly dependent on the method of pruning only in the case of assimilation products, i.e. reducing sugar and starch. Improvement of photosynthesis efficiency of intensively pruned eggplants was achieved by the increase of single leaf area and thickness of leaf mesophyll tissues without the increase of the level of assimilative pigments per plant mass unit.

Sign in / Sign up

Export Citation Format

Share Document