scholarly journals Productividad D E Lechuga (Lactuca Sativ A L .) En Acuaponía E Hidroponía

2021 ◽  
Vol 17 (21) ◽  
pp. 283
Author(s):  
Bautista Olivas Ana Laura ◽  
Fernandez David Rene ◽  
Alvarez Chavez Clara Rosalia ◽  
Mexia Sanchez Angel Carlos ◽  
Mendoza Cariño Mayra ◽  
...  
Keyword(s):  
Lactuca Sativa ◽  
Crop Production ◽  
Crop Yields ◽  
Production Systems ◽  
Database Integration ◽  
Systems Methodology ◽  
Significance Level ◽  
Lactuca Sativa L ◽  
Vegetable Farming ◽  
Two Stages

El cambio de uso del suelo con fines agrícolas bajo esquemas de manejo agrícola y uso del agua poco eficientes, originan suelos infértiles. Para el cultivo de hortalizas se estudian técnicas que produzcan altos rendimientos con los menores costos económicos y ambientales. Los objetivos del estudio fueron estimar y comparar el rendimiento de la lechuga (Lactuca sativa L.) en los sistemas productivos acuapónico (SA) e hidropónico (SH). La metodología comprendió dos etapas: el establecimiento de los sistemas productivos tipo Nutrition Film Technique (NFT) y el monitoreo del desarrollo del cultivo en ambos sistemas. Las bases de datos y el tratamiento estadístico se realizaron en el programa Excel de Windows Versión 10. La prueba t de student con un nivel de significancia de 0.05 indicó el peso promedio de las lechugas: 0.056 kg (± 0.005 kg) en el SA, y 0.097 kg (± 0.007 kg) en el SH. El SH generó mayor rendimiento (1.847 kg/m2) que el SA (1.080 kg/m2); lo que se atribuyó a que el SH contó con los nutrientes necesarios desde el inicio del cultivo, por la aplicación de fertilizante. La temperatura alta influyó en el comportamiento de los peces del SA, ya que provocaron menor consumo alimenticio y de aporte de desechos orgánicos al agua que, promovieron una baja cantidad de nutrientes y afectaron la producción y el rendimiento del cultivo. Se recomiendan la generación de conocimiento para complementar los resultados obtenidos, como el gasto hídrico y su comparación con los sistemas de cultivo de lechuga tradicionales. Land use change for agriculture under poor farm management and inefficient water use, produces infertile soils. For green vegetable farming, there are some techniques for the achievement of high crop yields with the lowest economic and environmental costs. The study objectives were to estimate and compare lettuce yields (Lactuca sativa L.) in aquaponic (SA) and hydroponic (SH) production systems. Methodology encompassed two stages: the establishing of a Nutrition Film Technique (NFT) productive system and the monitoring of the crop growing in both systems. Database integration and statistical analyses were performed using Windows Excel version 10. Average lettuce weight using t-test (significance level of 0.05) were 0.056 kg (± 0.005 kg) in SA, y 0.097 kg (± 0.007 kg) in SH. SH reached higher yields (1.847 kg/m2) than SA (1.080 kg/m2); likely due to the fact that SH had all needed nutrients since the beginning of the crop, by applying fertilizer. High temperature influenced fish behavior in SA, observing lower food consumption and organic waste supply to the water, releasing low nutrient load that affected crop production and yield. More studies are recommended in order to deepen the outcomes, such as those including water flow and the comparison with conventional lettuce crop systems.

scholarly journals Toxicity Effects of Selected Heavy Metals on Lactuca sativa and Hydra viridissima used for Sustainable Crop Production

2018 ◽  
Vol 7 (3) ◽  
pp. 82
Author(s):  
Lina Maria Caceres Diaz ◽  
Claudia Campos ◽  
Gideon Oron
Keyword(s):  
Heavy Metals ◽  
Acute Toxicity ◽  
Lactuca Sativa ◽  
Toxicity Test ◽  
Crop Production ◽  
Arid Regions ◽  
Toxicity Assessment ◽  
Agricultural Irrigation ◽  
Lactuca Sativa L ◽  
Toxicity Effects

This study examines the prospects for using Hydra viridissima toxicity test 96-h LC50, served as a model invertebrate, Lactuca sativa L. was applied for seeds toxicity test (120-h IC50) and a model plant for an acute toxicity assessment of heavy metals content in water. The heavy metals used to assess the acute toxicity of the water utilized for agricultural irrigation in arid regions includes cadmium (CdCl2.2H2O), chromium (K2Cr2O7), zinc (ZnSO4. 7H2O), and boron (H3BO3). A grading of the substances was conducted, and it was found that the toxicity levels for H. viridissima and L. sativa were, with the least harmful first: B < Cr < Zn < Cd and Zn < B < Cr < Cd, respectively. Results indicate that H. viridissima was a more sensitive indicator of toxicity for all of the evaluated substances. However, L. sativa could also be used successfully to rank toxicants in order of their potential hazards.

scholarly journals Toward a Reduced Reliance on Conventional Pesticides in European Agriculture

Plant Disease ◽  
2016 ◽  
Vol 100 (1) ◽  
pp. 10-24 ◽  
Author(s):  
Jay Ram Lamichhane ◽  
Silke Dachbrodt-Saaydeh ◽  
Per Kudsk ◽  
Antoine Messéan
Keyword(s):  
Crop Production ◽  
Crop Yields ◽  
Production Systems ◽  
Integrated Management ◽  
Crop Protection ◽  
Sustainable Use ◽  
Climatic Conditions ◽  
Pesticide Use ◽  
Eu Member States ◽  
European Agriculture

Whether modern agriculture without conventional pesticides will be possible or not is a matter of debate. The debate is meaningful within the context of rising health and environmental awareness on one hand, and the global challenge of feeding a steadily growing human population on the other. Conventional pesticide use has come under pressure in many countries, and some European Union (EU) Member States have adopted policies for risk reduction following Directive 2009/128/EC, the sustainable use of pesticides. Highly diverse crop production systems across Europe, having varied geographic and climatic conditions, increase the complexity of European crop protection. The economic competitiveness of European agriculture is challenged by the current legislation, which banned the use of many previously authorized pesticides that are still available and applied in other parts of the world. This challenge could place EU agricultural production at a disadvantage, so EU farmers are seeking help from the research community to foster and support integrated pest management (IPM). Ensuring stable crop yields and quality while reducing the reliance on pesticides is a challenge facing the farming community is today. Considering this, we focus on several diverse situations in European agriculture in general and in European crop protection in particular. We emphasize that the marked biophysical and socio-economic differences across Europe have led to a situation where a meaningful reduction in pesticide use can hardly be achieved. Nevertheless, improvements and/or adoption of the knowledge and technologies of IPM can still achieve large gains in pesticide reduction. In this overview, the current pest problems and their integrated management are discussed in the context of specific geographic regions of Europe, with a particular emphasis on reduced pesticide use. We conclude that there are opportunities for reduction in many parts of Europe without significant losses in crop yields.

Variations in Bioactive Substance Contents and Crop Yields of Lettuce (Lactuca sativa L.) Cultivated in Soils with Different Fertilization Treatments

2009 ◽  
Vol 57 (21) ◽  
pp. 10122-10129 ◽  
Author(s):  
Yanina Soledad Coria-Cayupán ◽  
María Ines Sánchez de Pinto ◽  
Mónica Azucena Nazareno
Keyword(s):  
Lactuca Sativa ◽  
Crop Yields ◽  
Lactuca Sativa L ◽  
Bioactive Substance

Does use of draft animal power increase economic efficiency of smallholder farms in Kenya?

2007 ◽  
Vol 22 (4) ◽  
pp. 290-296 ◽  
Author(s):  
P.M. Guthiga ◽  
J.T. Karugia ◽  
R.A. Nyikal
Keyword(s):  
Economic Efficiency ◽  
Crop Production ◽  
Production Efficiency ◽  
Crop Yields ◽  
Production Systems ◽  
Small Scale ◽  
Smallholder Farms ◽  
Land Preparation ◽  
Animal Power ◽  
Small Scale Farmers

AbstractDraft animal power (DAP) has been identified as an environmentally friendly technology that is based on renewable energy and encompasses integration of livestock and crop production systems. Draft animal technology provides farmers with a possibility to cheaply access and use manure from the draft animals and farm power needed to apply renewable practices for land intensification. Compared to motorized mechanization, DAP is viewed as an appropriate and affordable technology especially for small-scale farmers in developing countries who cannot afford the expensive fuel-powered tractor mechanization. However, it is apparent that there is no consensus among researchers on how it affects crop yields, profit and production efficiency when applied in farm operations. This study addressed the question of whether using DAP increases economic efficiency of smallholder maize producers in central Kenya. Results of the study are derived from a sample of 80 farmers, 57% of whom used draft animals while 43% used hand hoes in carrying farm operations. In the study area, draft animals are almost exclusively used for land preparation and planting, with very few farmers applying them in the consecutive operations such as weeding. A profit function was estimated to test the hypothesis of equal economic efficiency between ‘DAP’ and ‘hoe’ farms. The results showed that farmers who used DAP obtained higher yields and operated at a higher economic efficiency compared to those who used hand hoes. The analysis underscores the viability of DAP in increasing profitability of small-scale farms; however, other aspects of the technology, such as affordability of the whole DAP package, availability of appropriate implements and skills of using the technology, must be taken into account when promoting adoption of DAP technology.

scholarly journals Spatial Characterization of Microbial Communities on Multi-Species Leafy Greens Grown Simultaneously in the Vegetable Production Systems on the International Space Station

Life ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1060
Author(s):  
Mary E. Hummerick ◽  
Christina L. M. Khodadad ◽  
Anirudha R. Dixit ◽  
Lashelle E. Spencer ◽  
Gretchen J. Maldonado-Vasquez ◽  
...  
Keyword(s):  
International Space Station ◽  
Lactuca Sativa ◽  
Crop Production ◽  
Production Systems ◽  
Space Station ◽  
Amplicon Sequencing ◽  
Vegetable Production ◽  
International Space ◽  
Leafy Greens ◽  
The Impact

The establishment of steady-state continuous crop production during long-term deep space missions is critical for providing consistent nutritional and psychological benefits for the crew, potentially improving their health and performance. Three technology demonstrations were completed achieving simultaneous multi-species plant growth and the concurrent use of two Veggie units on the International Space Station (ISS). Microbiological characterization using molecular and culture-based methods was performed on leaves and roots from two harvests of three leafy greens, red romaine lettuce (Lactuca sativa cv. ‘Outredgeous’); mizuna mustard, (Brassica rapa var japonica); and green leaf lettuce, (Lactuca sativa cv. Waldmann’s) and associated rooting pillow components and Veggie chamber surfaces. Culture based enumeration and pathogen screening indicated the leafy greens were safe for consumption. Surface samples of the Veggie facility and plant pillows revealed low counts of bacteria and fungi and are commonly isolated on ISS. Community analysis was completed with 16S rRNA amplicon sequencing. Comparisons between pillow components, and plant tissue types from VEG-03D, E, and F revealed higher diversity in roots and rooting substrate than the leaves and wick. This work provides valuable information for food production-related research on the ISS and the impact of the plant microbiome on this unique closed environment.

scholarly journals Productivity and Economic Viability of Intercropping of Cucumber and Lettuce, in Southern Tocantins, Brazil

2019 ◽  
pp. 1-7
Author(s):  
Ádila Pereira De Sousa ◽  
Maria Cristina Silva Martins ◽  
Susana Cristine Siebeneichler ◽  
Eduarda Veríssimo Dos Santos ◽  
Raffael Batista Marques ◽  
...  
Keyword(s):  
Lactuca Sativa ◽  
Production Systems ◽  
Vegetable Consumption ◽  
Cropping Systems ◽  
Production Costs ◽  
Economic Viability ◽  
Cucumis Sativus L ◽  
Lactuca Sativa L ◽  
Medicinal Value ◽  
Technical Coefficients

In Brazil, vegetable consumption grows every year, as it has many advantages, from the supply of food to the medicinal value, which makes it necessary to optimize the use of land by producers, and an alternative used is the intercropping. Therefore, this study aimed to analyze the productivity and economic viability of cucumber (Cucumis sativus L.) and lettuce (Lactuca sativa L.) in two different cropping systems (intercropped and monoculture). The production of seedlings was held at UFT —Gurupi Campus and the experiment conducted in a given area featuring 13m wide and 23 m in length, totaling 299 m2, in the period between June and August of 2018. The area mentioned was used for the production of Lucy Brown lettuce, and the ‘Caipira’ variety of cucumber. The experiment was conducted in a cazualized block with four replications and three treatments, which were incorporated in: monoculture of cucumber (T1), monoculture of lettuce (T2), and consortium of lettuce with cucumber (T3). Lettuce and cucumber in monoculture presented the best answers for all variables analyzed when compared with the consortium. The index of equivalence area (IEA) was calculated to assess the efficiency of crops in both production systems. And the value found for the IEA showed that the consortium is efficient within the production system. According to the technical coefficients relating to deployment, conducting plants and their production costs, the Consortium has proven economically viable.

scholarly journals Sustainable Intensification in Agriculture: An Approach for Making Agriculture Greener and Productive

2021 ◽  
Vol 7 ◽  
pp. 133-150
Author(s):  
Jiban Shrestha ◽  
Subash Subedi ◽  
Krishna Prasad Timsina ◽  
Sudeep Subedi ◽  
Meena Pandey ◽  
...  
Keyword(s):  
Crop Production ◽  
Crop Yields ◽  
Production Systems ◽  
Climatic Conditions ◽  
Sustainable Intensification ◽  
Modern World ◽  
Agronomic Practices ◽  
Farm Mechanization ◽  
Use Efficiency

Sustainable intensification of agriculture is a good approach for reducing the yield gap without exacerbating the current condition of the environmental components, which is a big challenge for agriculture in the modern world. This review provides a summary of the role and approaches of sustainable intensification in agriculture which offer ways to increase crop production and create long-term sustainability in agriculture production. The current demand for food has continued to rise as a result of the world's rapidly increasing population. In order to increase crop/food production, agricultural systems should be intensified by more sustainable practices, as well as by reforming existing production systems/techniques and diversifying them into newer and more profitable enterprises. Despite the heavy use of inputs, farmers have recently been unable to achieve optimal crop yields. The judicious use of agricultural inputs, combined with improved management techniques, is important for advancing sustainable intensification. New scientific techniques in agronomic practices, as well as improved farm mechanization, are helping to boost resource use efficiency in sustainable crop production. The sustainable agricultural intensification is necessary to increase the agricultural productivity under the changing and adverse climatic conditions while maintaining healthy production practices.

scholarly journals Fish By-Product Use as Biostimulants: An Overview of the Current State of the Art, Including Relevant Legislation and Regulations within the EU and USA

Molecules ◽  
2020 ◽  
Vol 25 (5) ◽  
pp. 1122 ◽  
Author(s):  
Moses Madende ◽  
Maria Hayes
Keyword(s):  
Plant Growth ◽  
Crop Production ◽  
Crop Yields ◽  
Production Systems ◽  
Genetic Selection ◽  
Agricultural Practices ◽  
Cost Effective ◽  
Protein Hydrolysates ◽  
Negative Effects ◽  
Waste Products

Crop production systems have adopted cost-effective, sustainable and environmentally friendly agricultural practices to improve crop yields and the quality of food derived from plants. Approaches such as genetic selection and the creation of varieties displaying favorable traits such as disease and drought resistance have been used in the past and continue to be used. However, the use of biostimulants to promote plant growth has increasingly gained attention, and the market size for biostimulants is estimated to reach USD 4.14 billion by 2025. Plant biostimulants are products obtained from different inorganic or organic substances and microorganisms that can improve plant growth and productivity and abate the negative effects of abiotic stresses. They include materials such as protein hydrolysates, amino acids, humic substances, seaweed extracts and food or industrial waste-derived compounds. Fish processing waste products have potential applications as plant biostimulants. This review gives an overview of plant biostimulants with a focus on fish protein hydrolysates and legislation governing the use of plant biostimulants in agriculture.

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