scholarly journals Mycorrhizal fungi and phosphate fertilization in the production of Euterpe edulis seedlings

2021 ◽  
Vol 53 (2) ◽  
pp. 109-118
Author(s):  
Déborah Sampaio de Almeida ◽  
Marta Simone Mendonça Freitas ◽  
Almy Junior Cordeiro de Carvalho ◽  
Rômulo André Beltrame ◽  
Sarah Ola Moreira ◽  
...  

The present study evaluated the effect of arbuscular mycorrhizal fungi (AMF) inoculation on growth and nutrition of Euterpe edulis seedlings, supplemented or not with phosphate fertilization. The experiment was conducted in a greenhouse. The randomized block design, consisted of a 3x2 factorial arrangement and 4 replicates, with two phosphorus doses (0 and 50 mg dm-3 of soil), two microbiological treatments (Rhizophagus clarus;  laroideoglomus etunicatum; R. clarus + C. etunicatum) and control (without fungus). Sowing and inoculation occurred concurrently in 2 kg plastic bags. Height, collar diameter, leaf area, dry shoot mass, macronutrient content and mycorrhizal colonization percentage were determined after 226 days. Regarding mycorrhizal colonization percentage, R. clarus resulted significantly beneficial for the production of E. edulis seedlings. In the absence of phosphate fertilization, R. clarus and mixed inoculum increased all biometric variables and macronutrient contents in seedlings. Therefore, it is concluded that AMF inoculations provide beneficial effects for growth and nutrition of E. edulis seedlings, resulting in more vigorous plants at a low-cost strategy. Highlights: Rhizophagus clarus resulted significantly beneficial for the production of E. edulis seedlings and in the absence of phosphate fertilization, and mixed inoculum ( clarus + Claroideoglomus etunicatum) increased all biometric variables and macronutrient contents in seedlings. The AMF inoculations provide beneficial effects for growth and nutrition of E. edulis seedlings, resulting in more vigorous plants at a low-cost strategy. The AMF, a biological agent of mutualistic associations with plants, constitutes an innovative approach to sustainable agriculture, contributing to increase plant survival rate, a key-factor for the successful reintroduction and conservation of E. edulis, as well as for its commercial exploitation.

2017 ◽  
Vol 139 ◽  
pp. 50-57 ◽  
Author(s):  
H. Lynch ◽  
F.C. Leonard ◽  
K. Walia ◽  
P.G. Lawlor ◽  
G. Duffy ◽  
...  

2017 ◽  
Vol 49 (4) ◽  
pp. 971-988 ◽  
Author(s):  
Franck Lespinas ◽  
Ashu Dastoor ◽  
Vincent Fortin

Abstract This study presents an evaluation of the performance of the dynamically dimensioned search (DDS) algorithm when calibrating the hydrological component of the Visualizing Ecosystems for Land Management Assessments (VELMA) ecohydrological model. Two calibration strategies were tested for the initial parameter values: (1) a ‘high-cost strategy’, where 100 sets of initial parameter values were randomly chosen within the overall parameter space, and (2) a ‘low-cost strategy’, where a unique set of initial parameter values was derived from the available field data. Both strategies were tested for six different values of the maximum number of model evaluations ranging between 100 and 10,000. Results revealed that DDS is able to converge rapidly to a good parameter calibration solution of the VELMA hydrological component regardless of the parameter initialization strategy used. The accuracy and convergence efficiency of the DDS algorithm were, however, slightly better for the low-cost strategy. This study suggests that initializing the parameter values of complex physically based models using information on the watershed characteristics can increase the efficiency of the automatic calibration procedures.


2012 ◽  
Vol 24 ◽  
pp. 117-131 ◽  
Author(s):  
Fernando J.T.E. Ferreira ◽  
Aníbal T. de Almeida

2020 ◽  
Vol 12 (5) ◽  
pp. 1850
Author(s):  
Tingyong Zhong ◽  
Fangcheng Sun ◽  
Haiyan Zhou ◽  
Jeoung Yul Lee

This paper investigates the relationship between business strategy and cost stickiness under different ownership. Using the data from listed firms in China from 2002 to 2015, we find that first, firms with different strategies exhibit different cost behavior. The cost stickiness of choosing a differentiation strategy is higher than that of choosing a low-cost strategy. Second, management expectations will affect cost stickiness. Optimistic expectations will increase cost stickiness, while pessimistic expectations will reduce cost stickiness. Third, management expectations can adjust the relationship between business strategy and cost stickiness in terms of government-created advantages (GCAs). If management expectations tend to be optimistic, the cost stickiness is higher with a differentiation strategy than with a low-cost strategy. If management expectations tend to be pessimistic, then cost stickiness is higher with a low-cost strategy than with a differentiation strategy. Finally, the state-owned equity affects the extent of the effect of a differentiation strategy on cost stickiness. State-owned firms, which receive more GCAs than non-state-owned firms, have stronger cost stickiness than non-state-owned firms, even if both categories of firms use more differentiation strategy.


2019 ◽  
Vol 14 (1) ◽  
Author(s):  
Ilária Cristina Sgardioli ◽  
Fabíola Paoli Monteiro ◽  
Paulo Fanti ◽  
Társis Paiva Vieira ◽  
Vera Lúcia Gil-da-Silva-Lopes

RSC Advances ◽  
2020 ◽  
Vol 10 (60) ◽  
pp. 36404-36412
Author(s):  
Alessia Ventrella ◽  
Adalberto Camisasca ◽  
Antonella Fontana ◽  
Silvia Giordani

An easy and low-cost strategy for the synthesis of bright fluorescent CDs from CNOs and GO.


2018 ◽  
Vol 1019 ◽  
pp. 111-118 ◽  
Author(s):  
Nan Cheng ◽  
Qin Wang ◽  
Ying Shang ◽  
Yuancong Xu ◽  
Kunlun Huang ◽  
...  

2016 ◽  
Vol 46 (12) ◽  
pp. 2235-2240 ◽  
Author(s):  
XianJun Yuan ◽  
ZhiHao Dong ◽  
Seare Tajebe Desta ◽  
AiYou Wen ◽  
Xiaoxuan Zhu ◽  
...  

ABSTRACT: Ensilage is a simple and low-cost strategy to enable long term preservation and environmentally friendly utilization of agricultural by-products, such as straws and distiller's grains (DG) for ruminants. Effect of mixing different proportions of DG and rice straw (i.e. 0, 10, 20 or 30% of DG) with or without 5% molasses addition on fermentation and chemical variables of silages was evaluated. The study was conducted as a randomized blocks design in a 4 × 2 factorial arrangement, with three replications, using laboratory silos of 1L capacity (n=24). Despite a significant interaction (P<0.01) between DG and molasses addition was observed for most variables, in general the increased addition of DG linearly decreased the pH value, acetic acid (AA), butyric acid (BA) and ammonia N concentration (P<0.01), and increased the lactic acid (LA) concentration (P<0.01). Exception was the propionic acid concentration which linearly decreased without molasses addition and linearly increased with molasses addition at increased proportion of DG (P<0.01). In both silages with or without molasses the addition of DG increased the dry matter, water soluble carbohydrates and crude protein (P<0.01), and decreased the NDF content (P<0.01). Based on the perspective of maximum utilization of rice straw, the mixture of 10% of DG associated to 5% molasses at ensilage process is recommended.


2020 ◽  
Vol 11 (03) ◽  
pp. 250-261
Author(s):  
Roberta Pires Correa ◽  
Patrícia Pinto Teixeira ◽  
Anderson da Costa Lacerda ◽  
Julia Barral Dodd Rumjanek ◽  
Vivian Mary Barral Dodd Rumjanek ◽  
...  

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