A conceptual framework and an empirical test of complementarity and facilitation with respect to phosphorous uptake by plant species mixtures

Pedosphere ◽  
2022 ◽  
Vol 32 (2) ◽  
pp. 317-329
Author(s):  
Chunjie LI ◽  
Thomas W. KUYPER ◽  
Wopke VAN DER WERF ◽  
Junling ZHANG ◽  
Haigang LI ◽  
...  
Keyword(s):  
Conceptual Framework ◽  
Plant Species ◽  
Empirical Test ◽  
Phosphorous Uptake ◽  
Species Mixtures

A Reinterpretation of the ‘Attitude’ Approach to Transport-Mode Choice and an Exploratory Empirical Test

1976 ◽  
Vol 8 (7) ◽  
pp. 793-810 ◽  
Author(s):  
K Thomas
Keyword(s):  
Empirical Study ◽  
Conceptual Framework ◽  
Empirical Test ◽  
Cognitive Structure ◽  
Travel Mode ◽  
Transport Mode ◽  
Belief Structure ◽  
Salient Beliefs ◽  
Transport Behaviour ◽  
Perceived Outcomes

A theory of cognitive structure is presented which is potentially capable of providing a conceptual framework for the study of transport behaviour, and by making use of this theory and the models derived from it, problematic areas in attitude and attribute research in transportation are discussed. An exploratory empirical study is described which successfully tests some of the relationships inherent in the theory in a transport context. Significant correlations were observed between overall attitude towards use of a travel mode and the products of evaluation and belief strength summed over a short series of perceived outcomes of use of that mode. The content, strength, and associated evaluations of salient beliefs about use of a travel mode were monitored during a period of change in the conditions of the service. Predictable changes in belief structure were observed, demonstrating the sensitivity of the techniques used.

scholarly journals Variation in Virulence Within Meloidogyne chitwoodi, M. fallax, and M. hapla on Solanum spp.

1998 ◽  
Vol 88 (7) ◽  
pp. 658-665 ◽  
Author(s):  
J. G. van der Beek ◽  
L. M. Poleij ◽  
C. Zijlstra ◽  
R. Janssen ◽  
G. J. W. Janssen
Keyword(s):  
Plant Species ◽  
Wild Species ◽  
Species Interaction ◽  
Meloidogyne Hapla ◽  
Plant Genotype ◽  
Nematode Reproduction ◽  
Second Stage ◽  
Genotype Interaction ◽  
Solanum Spp ◽  
Species Mixtures

The virulence of Meloidogyne hapla, M. chitwoodi, and M. fallax was studied on genotypes of Solanum spp. in a greenhouse. Juveniles of 11 M. hapla race A isolates, 3 M. hapla race B isolates, and 5 mono-female lines of a M. hapla race A isolate were inoculated on S. chacoense, S. hougasii, and S. sparsipilum. Juveniles of eight M. chitwoodi isolates, five M. fallax isolates, and six mono-female lines of a M. chitwoodi isolate were inoculated on S. bulbocastanum, S. chacoense, S. hougasii, S. stoloniferum, and S. tuberosum. Virulence was expressed as nematode reproduction 8 weeks after inoculation. Nematode reproduction was estimated by the number of egg masses and, in one experiment, by the number of hatched second-stage juveniles per inoculated juvenile. Considerable variation in virulence and resistance was observed among M. hapla isolates and plant genotypes, respectively. The M. hapla isolate-plant species interaction was highly significant. The response to M. chitwoodi ranged from susceptible (S. tuberosum and S. chacoense) to highly resistant (S. bulbocastanum and S. hougasii). S. tuberosum was susceptible to M. fallax, whereas all four wild species were resistant. In contrast to M. hapla, no significant isolate-plant genotype interaction was obtained for M. chitwoodi or M. fallax, indicating no or little intraspecific variation in virulence. M. chitwoodi juveniles in species mixtures with M. fallax isolates appeared to be able to break the resistance of S. bulbocastanum and S. hougasii. Significant differences among mono-female lines of M. hapla and M. chitwoodi were observed, indicating heterogeneity of pathogenicity within meiotic parthenogenic Meloidogyne populations.

scholarly journals Jewish Spirituality, Depression, and Health: an Empirical Test of a Conceptual Framework

2012 ◽  
Vol 20 (3) ◽  
pp. 327-336 ◽  
Author(s):  
Elizabeth J. Krumrei ◽  
Steven Pirutinsky ◽  
David H. Rosmarin
Keyword(s):  
Conceptual Framework ◽  
Empirical Test

A Conceptual Framework for Preventing the Spatial Dispersal of Invasive Plants

Weed Science ◽  
2007 ◽  
Vol 55 (2) ◽  
pp. 178-184 ◽  
Author(s):  
Kirk W. Davies ◽  
Roger L. Sheley
Keyword(s):  
Conceptual Framework ◽  
Plant Species ◽  
Invasive Plants ◽  
Invasive Plant ◽  
Management Strategies ◽  
Invasive Plant Species ◽  
Plant Seed ◽  
Plant Dispersal ◽  
Dispersal Vectors ◽  
Spatial Dispersal

Invasive plant species have adversely affected rangelands throughout the world and continue to invade previously uninfested lands at an alarming rate. Previous efforts have focused on eradication and control; however, recent efforts have recognized that preventing invasive plant species from infesting new areas is more cost-effective and efficient than trying to restore the system after it is infested. One of the major components of prevention is limiting the introduction of the invasive plant to uninfested areas. Guidelines to limit the introduction of invasive plants into new areas are usually general and not developed to address differences in dispersal vectors among invasive plants. To limit the dispersal of invasive plants, land managers need a framework that assists them in identifying major spatial dispersal vectors and management strategies based on those vectors. We propose an initial conceptual framework that integrates the ecology of invasive plant dispersal with prevention management. The framework identifies major potential vectors by incorporating invasive plant seed adaptations for dispersal through space and infestation locations relative to vector pathways. The framework then proposes management strategies designed to limit dispersal by those specific vectors. The framework ALSo identifies areas where research could improve the effectiveness of dispersal-prevention strategies by providing additional management tools.

PLANT SPECIES MIXTURES FOR FORAGE PRODUCTION FOR RUMINANT FEEDING UNDER MEDITERRANEAN CONDITIONS

2013 ◽  
Vol 50 (3) ◽  
pp. 426-437 ◽  
Author(s):  
E. TSIPLAKOU ◽  
G. ECONOMOU ◽  
I. HADJIGEORGIOU ◽  
A. KOMINAKIS ◽  
G. ZERVAS
Keyword(s):  
Linolenic Acid ◽  
Plant Species ◽  
Festuca Arundinacea ◽  
Animal Feed ◽  
Low Cost ◽  
Small Ruminants ◽  
Forage Production ◽  
Matter Production ◽  
Natural Grasslands ◽  
Species Mixtures

SUMMARYThe establishment of leys for biomass production during the winter months could be an alternative feed resource of low cost for small ruminants in Mediterranean basin. For this purpose, an experiment was carried out with six plant species mixtures (PSM) that were cut up to seven times from seeding. The results showed that all the PSM had their highest growth at the 2nd cut withFestuca arundinacea,Lolium perenne,Dactylis glomerata,Trifolium repens(FLDT) being superior as the dry matter production concerns compared with the PSM that gave seven cuts. The crude protein and the ether extracts contents in all the PSM decreased from the 1st to the last cut, while that of NDF and ADF increased. The concentrations of myristic, palmitic, stearic, oleic and linoleic acid increased in all the PSMs from the 2nd to the 5th cut, while the opposite was observed for the α-linolenic acid content. The concentration of α-linolenic acid was higher in the FLDT PSM when compared to others during all cuts. Taking into account all the examined parameters together, the FLDT seems to be superior to the other PSMs as animal feed for small ruminants, particularly during the period where there is no available grass from natural grasslands.

scholarly journals AnrbcLReference Library to Aid in the Identification of Plant Species Mixtures by DNA Metabarcoding

2017 ◽  
Vol 5 (3) ◽  
pp. 1600110 ◽  
Author(s):  
Karen L. Bell ◽  
Virginia M. Loeffler ◽  
Berry J. Brosi
Keyword(s):  
Plant Species ◽  
Dna Metabarcoding ◽  
Species Mixtures
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