检索结果-南通市图书馆

Estimating Compositions and Nutritional Values of Seed Mixes Based on Vision Transformers

Plant Phenomics 2023年第4期5卷 805-815页

作者： Shamprikta Mehreen Hervé Goëau Pierre Bonnet Sophie Chau Julien Champ Alexis Joly Inria LIRMMUniversity MontpellierCNRSMontpellierFrance cirad UMR AMAPMontpellierOccitanieFrance Chambre d'Agriculture-Haute Vienne LimogesNouvelle-AquitaineFrance

The cultivation of seed mixtures for local pastures is a traditional mixed cropping technique of cereals and legumes for producing,at a low production cost,a balanced animal feed in energy and protein in livestock *** considerably improving the autonomy and safety of agricultural systems,as well as reducing their impact on the environment,it is a type of crop that responds favorably to both the evolution of the European regulations on the use of phytosanitary products and the expectations of consumers who wish to increase their consumption of organic ***,farmers find it difficult to adopt it because cereals and legumes do not ripen synchronously and the harvested seeds are heterogeneous,making it more difficult to assess their nutritional *** efforts therefore remain to be made to acquire and aggregate technical and economical references to evaluate to what extent the cultivation of seed mixtures could positively contribute to securing and reducing the costs of herd *** work presented in this paper proposes new Artificial Intelligence techniques that could be transferred to an online or smartphone application to automatically estimate the nutritional value of harvested seed mixes to help farmers better manage the yield and thus engage them to promote and contribute to a better knowledge of this type of *** this purpose,an original open image dataset has been built containing 4,749 images of seed mixes,covering 11 seed varieties,with which 2 types of recent deep learning models have been *** results highlight the potential of this method and show that the best-performing model is a recent state-of-the-art vision transformer pre-trained with self-supervision(Bidirectional Encoder representation from Image Transformer).It allows an estimation of the nutritional value of seed mixtures with a coefficient of determination R^(2)score of 0.91,which demonstrates the interest of this type of approach,for its possible use

关键词： transferred cultivation harvest

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Effect of the seeds provenance and treatment on the germination rate and plants growth of four forest trees species of Cote d’Ivoire

引用

Journal of Forestry Research 2021年第1期32卷 161-169页

作者： Sélastique Doff ou Akaff ou AiméKouassi Kouame Nestor Bi Boh Gore Georges Yao Abessika Henri Kouadio Kouassi Perla Hamon Sylvie Sabatier Jerome Duminil Department for Seeds and Seedlings Production Jean Lorougnon GuédéUniversityBP 150DaloaCote d’Ivoire IRD UMR DIADEB.P.6450134394 Montpellier Cedex 5France cirad UMR AMAP34398 MontpellierFrance

The rapid rate of deforestation in Cote d’Ivoire has led to loss of plant species diversity and also threatens some commercial tree species with *** reforestation and aff orestation has been ***,for some species,the numbers of surviving transplants has ***,it is necessary to develop properly adapted and resilient genotypes that can eff ectively support the programs of forest *** this context we evaluated the eff ects of the provenances of seeds and of various treatments on the germination rates and on plant growth of four commercial trees species(Pycnanthus angolensis,Terminalia superba,Mansonia altissima and Pterygota macrocarpa).We analyzed these parameters for seeds of three provenances(Daloa,Akoupéand Daoukro)of four species and for thirty plants aged 6 months per *** to begin germination and time to reach maximum germination were similar among species,and were not infl uenced by either treatment or *** seeds and those soaked for 24 and 48 h in water at room temperature yielded the highest germination rates,irrespective of species or *** one exception was ***,for which no germination was *** species,some provenances produced higher germination percentages than did *** clear relationship was computed between the germination rate and the morphometric characteristics of the seeds which varied signifi cantly between *** growth and morphological variability also depended greatly on *** factors might be implicated,therefore provenance trials should be undertaken and ***,molecular analysis should be undertaken to confi rm the implications of genetic factors and allow for genetic selection.

关键词： Forest trees Seed germination Plant growth Provenance Cote d’Ivoire

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Larval interference competition between the native Neotropical mosquito Limatus durhamii and the invasive Aedes aegypti improves the fitness of both species

引用

Insect Science 2018年第6期25卷 1102-1107页

作者： Stanislas Talaga Alain Dejean Clémence Mouza Yves Dumont Céline Leroy lnsUtut Pasteur de la Guyane Unitéd'Entomologie MédicaleCayenne cedexFrance CNRS UMR EcoFoGAgroParisTechCiradINRAUniversitédes AntillesUniversitéde GuyaneKourouFrance CNRS INPTUPSEcolabUniversitéde ToulouseToulouseFrance amap CIRADCNRSINRAIRDUniversit6MontpellierMontpellierFrance

Interspecific competition with native species during biological invasions can sometimes limit alien *** aimed to determine the potential ecological effects of Limatus durhamii Theobald 1901,a native Neotropical mosquito (Diptera:Culicidae) species,on the invasive species Aedes (Stegomyia)aegypti (Linnaeus 1762)that breeds in the same artificial water *** time and adult dry mass were measured in 3 rearing conditions:control (a single larva),intraspecific competition (2 conspecific larvae),and interspecific competition (2 heterospecific larvae).Food was provided ad libitum to eliminate exploitative *** ***,development time was not affected by interspecific interference competition (nonsignificant differences with the control)and the adult dry mass was significantly higher,meaning that individual fitness likely ***,because previous studies showed longer development time and lighter adults during competition with other invasive mosquitoes,it is likely that *** can express a different phenotype depending on the competing *** similar pattern found for *** females and the nonsignificant difference with the control for males explain in part why this species can compete with ***.

关键词： Aedes aegypti increased fitness interference competition Limatus durhamii phenotypic plasticity resistance to invasion

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Maternal environment and seed size are important for successful germination and seedling establishment of Pterocarpus erinaceus (Fabaceae)

引用

Journal of Forestry Research 2022年第3期33卷 977-990页

作者： Beda Innocent Adji Doffou Sélastique Akaffou Philippe De Reffye Sylvie Sabatier Department for Seeds and Seedlings Production UniversitéJean Lorougnon GuédéAgroforestry UFRBP 150DaloaCôte d’Ivoire umr-botAnique Et Modélisation de L’Architecture Des Plantes Et Des Végétations(amap) CIRADUniversitéMontpellierCNRSINRAE34398MontpellierIRDFrance

Seed size and the growth environment are important variables that influence seed germination, growth and biomass of seedlings and future tree harvest and should thus be taken into account in agroforestry and reforestation programmes for endangered species like Pterocarpus erinaceus. In the present study, to assess seedling germination and vigour in P. erinaceus as a function of seed size in two environments, 1080 seeds and 360 seedlings were evaluated at two separate sites in Côte d'Ivoire. The results show that large seeds had very high germination rates (up to 100%) and produced more vigorous plants better able to adapt to climate change. The maternal environment and seed size had a significant influence on seed germination (P < 0.05) and seedling development (P < 0.05) and biomass (P < 0.05). Seedlings were most successful at the site with a humid tropical climate (Daloa). Seedling leaves had the same resistance regardless of seed size and study site, but leaf moisture content was more stable in seedlings grown from medium and small seeds. These results will help guide conservation strategies for the species and are key factors for rural populations, loggers, and forest management structures for the silviculture of this species.

关键词： Pterocarpus erinaceus Seed size Germination performance Seedling Growth

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Modeling of Date Palm （Phoenix dactylifera L.） Vegetative Aerial Architecture, Example of Two Tunisian Cultivars

引用

Journal of Life Sciences 2014年第5期8卷 418-424页

作者： Sana Gammoudi René Lecoustre Mohamed Ben Salah Arid and Oases Cropping Laboratory Arid Lands Institute Medenine 4119 Tunisia umr amap cirad-bios Boulevard de la Lironde TA AS1/PS2 - 34398 Montpellier Cedex 5 France

The present study was carried out to verify the statistical relationships between the characteristic parameters in terms of vegetative aerial architecture of the date palms for simulating realistic 3D models. The vegetal material was composed of two Tunisian varieties of Phoenix dactylifera L., ＂Barhi＂ and ＂Rochdi＂. The observations are taken place in Gabes and on one pair of palms per main stem and offshoot for each cultivar. The analysis of the characteristic dimensions of the pinnae and rachis allowed the determination of a minimum sample. The geometrical analysis confirmed the existence of a strong correlation between rotation angles and radial angles. The architectural analysis of the two Tunisian cultivars revealed that the distribution of characteristic parameter values of pinnae was the outcome ofa regionalized variable along the rachis. This statistical study of relationships between the characteristic parameters in terms of vegetative aerial architecture of the two varieties allows executing a new measurement protocol for computing and simulating realistic 3D models.

关键词： Phoenix dactylifera L. modeling architecture minimum sample correlation.

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Effect of Four Abiotic Factors on Macro-Anatomical Markers Development in <i>Parkia biglobosa</i>, Jack, R. Br., 1830 (Fabaceae) Crown

引用

American Journal of Plant Sciences 2021年第4期12卷 645-661页

作者： Beda Innocent Adji Doffou Sélastique Akaffou Kouadio Henri Kouassi Yao Patrice Houphouet Jerôme Duminil Sylvie Sabatier Université Jean Lorougnon Guédé Agroforestry UFR Daloa Cote d’Ivoire cirad UMR AMAP Montpellier France amap Université Montpellier CIRAD CNRS INRAE IRD Montpellier France IRD UMR-DIADE Montpellier Cedex 5 France DIADE Université Montpellier CIRAD IRD Montpellier France

Interpretation of primary growth markers (modules) is neglected in sustainable resource management processes, yet it opens up prospects for long time series on tree crown development, necessary for their characterization in the current context of climate change. This study aimed to assess the morphological variation of crown shoots in Parkia biglobosa in the face of a changing environment. Axis growth modules of 420 individuals of different ages were retrospectively analyzed in the presence or absence of shading during the wet and dry seasons in seven localities in Cote d’Ivoire. The results showed that the developmental environment of individuals did not influence the growth modules dimensions (P > 0.05). However, module size remained significantly different between locations (P Parkia biglobosa is a monochasial sympod (Pseudo-monopod) with a relay axis that follows the Paul Champagnat architectural model in the young stage, and transits to the Wilhelm Troll model later in the adult and old stage. This information contributes to the understanding of the functioning of crown and the adaptation of this species to a varying environment. It could guide choice of suitable environment and ideal genotype for the implementation of a reforestation or agroforestry programme based on Parkia biglobosa.

关键词： Parkia biglobosa Environment Development Growth Modules Crown

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Influence of Different Environments on Germination Parameters and Seedling Morphology in <i>Khaya senegalensis</i>(Desr.) A. Juss (Meliaceae)

引用

American Journal of Plant Sciences 2020年第10期11卷 1579-1600页

作者： Beda Innocent Adji Sélastique Doffou Akaffou Kouadio Henri Kouassi Yao Patrice Houphouet Jerôme Duminil Sylvie Sabatier Université Jean Lorougnon Guédé Agroforestry UFR Departement for Seeds and Seedlings Production Daloa Cote d’Ivoire cirad UMR AMAP Montpellier France AMAP Université Montpellier CIRAD CNRS INRA IRD Montpellier France IRD UMR-DIADE Montpellier Cedex 5 France

Khaya senegalensis is one of the largest and most majestic trees in Africa. Overexploited for its precious wood and medicinal values, the natural stands of this species are in danger of extinction in Cote d’Ivoire. Its sustainable management through regeneration techniques and assessment of its degree of adaptation to the changing climate is necessary. The aim of this study is to evaluate the effect of different environments on seedling germination and development in Khaya senegalensis. A total of 2160 seeds from different mother plants and 540 individuals from seed germination were selected and evaluated. The trials were conducted on three sites that were distinct by their microclimate (two nurseries in Cote d’Ivoire and one greenhouse in France). Analysis of variance showed that germination and morphology parameters were not influenced by the characteristics of the mother plants used (p > 0.05), but rather by the study sites (P < 0.05). The stable and controlled greenhouse climate was more advantageous for latency time (12.66 ± 0.80 days), germination delay (16.96 96 ± 0.54 days), germination speed (19.66 ± 2.95 days), germination duration (10.83 ± 2.27 days) and germination rate (88.88 ± 7.97) with more vigorous sowing than the other two sites. The results showed in general that the higher the height of the seedlings, the thicker the diameter of the seedlings (r = 0.796) and the higher the number of leaves (r = 0.946). This savannah species is native to the arid zones of Africa, but this study highlighted its adaptive potential to changing and different climates. These results are decision support tools for the regeneration of native pioneer forest species with high agroforestry potential and socio-economi

关键词： Khaya senegalensis Environments Germination Parameters Greenhouse Côte d’Ivoire

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Local Practices and Knowledge Associated with Date Palm Cultivation in Southeastern Niger

引用

Agricultural Sciences 2016年第9期7卷 586-603页

作者： Oumarou Zango Hervé Rey Yacoubou Bakasso René Lecoustre Frédérique Aberlenc Jean-Christophe Pintaud umr amap CIRAD Montpellier France Faculty of Sciences and Technologies University of Niamey Niamey Niger Montpellier University Montpellier France F2F-Palms Group UMR DIADE IRD Montpellier France

The date palm (Phoenix dactylifera L.), a dioecious species, is of particular interest in the Sahel due to its phenological plasticity in relation to climate change and its double-flowering capacity. This article explores local practices and knowledge associated with date palm cultivation in the oasis basins of southeastern Niger, and provides an inventory of local seed propagated varieties, for more effectively guiding agricultural research and the breeding of this species. We carried out a survey of 30 date palm growers in 14 villages of the Manga region. The qualitative data of the survey were processed by a Multiple Correspondence Analysis. We inventoried 19 date palm varieties, for which the main distinctive criterion was fruit colour, but some other criteria such as biology or provenance were also used. The cultural practices and knowledge associated with the date palm in Manga have improved since the 1990s. They also depend on ethnic groups and the importance they assign to farming compared to livestock rearing and trading activities. The type of basin (high, intermediate, or low water table) influences growers’ practices and perceptions. Lastly, the date harvest in the wet season is abundant, but of mediocre quality, whereas it is the opposite for the dry season harvest. To conclude, sustainable development of date palm cultivation in the Sahel zone relies firstly on the selection of varieties that are early fruit producers or that can complete fruit maturation during the raining season and secondly on technical capacity building for producers.

关键词： Sahel Phoenix dactylifera Seed Propagated Variety Local Knowledge Climate Change

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Modelling fine scale movements of herbivore assemblages

Modelling fine scale movements of herbivore assemblages

引用

第三世界生态高峰会

作者： Miabala-Milongui L. Bonnet O. Gaucherel C. INRA umr amap.TA40/PS2 34398 Montpellier Cedex 5.France CNRS.BIOMECO umr 7618 75005 Paris France INRA umr amap TA40/PS2 34398 Montpellier Cedex 5.France

This work aims at studying a theoretical model of animal movement groups to later apply it to large herbivore assemblages observed in African *** complex movement of individuals feeding in the same grass layer is simultaneously constrained by the grassland patch heterogeneity and by the social interactions generated by the group *** rules allowing interpreting the animal movements relatively to these neighbouring constraints have still to be *** would be of a great help to understand the role of the vegetation structure on the feeding behaviour and *** a higher scale (landscape,region)this question concerns the retroactive impact of animals on ecosystems in Africa and in particular the complex dynamic of grazing *** objective of this work is to adapt and parameterize a model able to simulate the dynamic behaviour of grouped individuals,from either one or many different herbivore species in spatial *** is performed starting from very simple laws inspired from physical systems already showing great abilities to model universal collective motion and combining one alignment force,one cohesion force and a noise(Gregoire and Chaté, 2004).This model potentially presents many advantages over other Individual-Based Model:it is able to manage high numbers of individuals of various natures(yet never applied to large animals),it is generic and has a promising theoretical *** a theoretical analysis,we adapted this model with some modifications (on the cohesion implementation in particular)to the case of herbivores, from which we have individual dynamic positioning data coming from the Hluhluwe-iMfolozi South-African game *** then simulated group movements under forced conditions to better understand: i)the fine scale animal behaviours depending on the species composition,the ages or the structure of the assemblage and ii)the role of various external factors and in particular the spatial propertie

关键词： Modelling fine scale movements of herbivore assemblages

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

The contribution of microorganisms and metazoans to mineral nutrition in bromeliads

引用

Journal of Plant Ecology 2016年第3期9卷 241-255页

作者： Céline Leroy Jean-François Carrias Régis Céréghino Bruno Corbara IRD UMR AMAP(botAnique et Modélisation de l’Architecture des Plantes et des végétations)Boulevard de la LirondeTA A‐51/PS2F‐34398 Montpellier Cedex 5France umr Ecologie des Forêts de Guyane(AgroParisTech CIRADCNRSINRAUniversitéde GuyaneUniversitédes Antilles)Campus AgronomiqueBP 316F-97379 Kourou cedexFrance UniversitéClermont Auvergne UniversitéBlaise PascalBP 10448F-63000 Clermont-FerrandFrance CNRS UMR 6023Laboratoire Microorganismes:Génome et EnvironnementCampus Universitaire des Cézeaux1 impasse Amélie MuratTSA 60026 CS *** Aubière cedexFrance Universitéde Toulouse INPUPS EcoLab(Laboratoire Ecologie Fonctionnelle et Environnement)F-31062 ToulouseFrance CNRS EcoLab118 Route de NarbonneF-31062 ToulouseFrance

Aims One critical challenge for plants is to maintain an adequate nutrient supply under fluctuating environmental *** is particularly true for epiphytic species that have limited or no access to the pedosphere and often live in harsh *** have evolved key innovations such as epiphytism,water-absorbing leaf trichomes,tank habit and Crassulacean acid metabolism(CAM)photosynthesis that enable them to survive under various environmental *** encompass diverse ecological types that live on different substrates(they can be terrestrial,epilithic or epiphytic)and vary in their ability to retain water(they can be tank-forming or tankless)and photosynthetic pathway(i.e.C3 or CAM).In this review,we outline the nutritional modes and specializations that enable bromeliads to thrive in a wide range of nutrient-poor(mostly nitrogen-depleted)*** FindingsBromeliads have evolved a great diversity of morphologies and functional adaptations leading to the existence of numerous nutritional *** on species that have absorptive foliar trichomes,we review evidence that bromeliads have evolved multi-faceted nutritional strategies to respond to fluctuations in the supply of natural nitrogen(N).These plants have developed mutualistic associations with many different and functionally diverse terrestrial and aquatic microorganisms and metazoans that contribute substantially to their mineral nutrition and,thus,their fitness and *** and fungal microbiota-assisted N provisioning,protocarnivory,digestive mutualisms and myrmecotrophic pathways are the main strategies used by bromeliads to acquire *** combination of different nutritional pathways in bromeliads represents an important adaptation enabling them to exploit nutrient-poor ***,as has been shown for several other vascular plants,multiple partners are involved in nutrient acquisition indicating that there have been convergent adap

关键词： digestive mutualism insect-assisted nutrients leafδ15N multiple N sources myrmecotrophy

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：