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Yadira Vargas-Tierras
National Institute of Agricultural Research (INIAP), Central Amazon Research Site (EECA), Joya de los Sachas 220350, Ecuador

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Journal article
Published: 18 August 2021 in Sustainability
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Agroforestry systems have become an alternative that promotes the conservation of natural resources and the sustainable production of fruit crops in the Ecuadorian Amazon. However, it is required to demonstrate the benefit of the companion species that make up these production systems. The objective of this research was to determine how the legume species within an agroforestry system influence the yield of yellow dragon fruit (pitahaya), carbon sequestration and nutritional contribution. The experiment was carried out in Palora (province of Morona Santiago) and organized in a randomized complete block design with three replications. The treatments were two agroforestry arrangements and the monoculture as a control treatment. Erythrina poeppigiana, Gliricidia sepium and Flemingia macrophylla were used in the agroforestry arrangements for the contribution of biomass. Results showed that during the five years of study, pitahaya yield was influenced by the quality of the leaf litter (biomass) incorporated in to the fruit crop. Biomass from E. poeppigiana and F. macrophylla as companion crops contributed a greater amount of Ca and Mg, increased C sequestration and crop yield. The results suggest that the use of legume species in agroforestry systems positively affects pitahaya productivity, enabling sustainable agriculture in the Ecuadorian Amazon.

ACS Style

Yadira Vargas-Tierras; Alejandra Díaz; Carlos Caicedo; Julio Macas; Alfonso Suárez-Tapia; William Viera. Benefits of Legume Species in an Agroforestry Production System of Yellow Pitahaya in the Ecuadorian Amazon. Sustainability 2021, 13, 9261 .

AMA Style

Yadira Vargas-Tierras, Alejandra Díaz, Carlos Caicedo, Julio Macas, Alfonso Suárez-Tapia, William Viera. Benefits of Legume Species in an Agroforestry Production System of Yellow Pitahaya in the Ecuadorian Amazon. Sustainability. 2021; 13 (16):9261.

Chicago/Turabian Style

Yadira Vargas-Tierras; Alejandra Díaz; Carlos Caicedo; Julio Macas; Alfonso Suárez-Tapia; William Viera. 2021. "Benefits of Legume Species in an Agroforestry Production System of Yellow Pitahaya in the Ecuadorian Amazon." Sustainability 13, no. 16: 9261.

Journal article
Published: 10 February 2021 in Agronomy
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An application of a balanced nutrition will improve the soil as well as enhance the yield of naranjilla (Solanum quitoense Lam.) grown in the Ecuadorian Amazon. A field experiment was carried out in Palora, 16 de Agosto (Morona Santiago province) and Fátima (Pastaza province) to find which variables are related with the yield of the naranjilla crop and the yield response when the crop receives complete nutrition with N, P, K, Ca, Mg, and S plus lime and with the omission of each of these nutrients. A Random Complete Block Design with three replications was used in the three environments. The naranjilla crop had higher yields (18.14 Mg ha−1) in the complete treatments (N, P, K, Ca, Mg, and S) and without S and Mg, consequently, these two last nutrients did not limit the production. When N, P, K, and Ca were not applied, the yields fell to 14.62 Mg ha−1. The main environmental effect showed that Palora had the highest fruit yields (19.73 Mg ha−1), followed by 16 de Agosto (13.57 Mg ha−1) and finally Fátima with 11.04 (Mg ha−1). These preliminary results showed that with the treatments without S (18.55 Mg ha−1), without Mg (18.42 Mg ha−1) and complete (17.46 Mg ha−1) the highest yields were obtained, consequently, the production was not affected by the absence of these elements; the opposite happened when N, P, K, and Ca were not present.

ACS Style

William Viera; Alejandra Díaz; Carlos Caicedo; Alfonso Suárez; Yadira Vargas. Key Agronomic Fertilization Practices that Influence Yield of Naranjilla (Solanum quitoense) in the Ecuadorian Amazon. Agronomy 2021, 11, 310 .

AMA Style

William Viera, Alejandra Díaz, Carlos Caicedo, Alfonso Suárez, Yadira Vargas. Key Agronomic Fertilization Practices that Influence Yield of Naranjilla (Solanum quitoense) in the Ecuadorian Amazon. Agronomy. 2021; 11 (2):310.

Chicago/Turabian Style

William Viera; Alejandra Díaz; Carlos Caicedo; Alfonso Suárez; Yadira Vargas. 2021. "Key Agronomic Fertilization Practices that Influence Yield of Naranjilla (Solanum quitoense) in the Ecuadorian Amazon." Agronomy 11, no. 2: 310.

Journal article
Published: 10 January 2021 in Ciencia & Tecnología Agropecuaria
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In the northern region of the Ecuadorian Amazon, there are papaya genotypes with acceptable production and fruit quality traits; however, they are heterogeneous. The aim of this research was to evaluate papaya genotypes for the selection of individuals through fruit quality traits. The study was carried out at the Central Amazon Experimental Station of Instituto Nacional de Investigaciones Agropecuarias, located in the canton La Joya de los Sachas, Orellana Province. A completely randomized design with a different number of observations according to the number of individuals per genotype was used. The recorded variables were: fruit weight (kg), pulp weight (kg), peel weight (kg), fruit diameter (cm), fruit length (cm), pulp thickness (cm), fruit firmness (kg-f), pH, total soluble solids (°Bx), titratable acidity, and flavor ratio. Data were subjected to one-way analysis of variance, mean comparison tests (Tukey 95%) for dendrograms, correlation matrix, and Biplot graphs. Results showed individuals with high production (more than 50 fruits/plant) and fruits with market demanded traits for fresh consumption (fruit weight between 0.2 and ≥ 2.0 kg, and soluble solids content ≥ 11.5 °Bx). In addition, ten elite individuals were identified as they meet the dual production and fruit quality traits, and must be considered for future breeding programmes.

ACS Style

Yadira Beatriz Vargas Tierras; Alejandra Evelyn Díaz Martínez; Carlos Danilo Congo Yépez; Leider Anibar Tinoco Jaramillo; William Fernando Viera Arroyo. Comparison of fruit quality traits of papaya (Carica papaya L.) genotypes from Shushufindi and La Joya de los Sachas, Ecuador. Ciencia & Tecnología Agropecuaria 2021, 22, 1 .

AMA Style

Yadira Beatriz Vargas Tierras, Alejandra Evelyn Díaz Martínez, Carlos Danilo Congo Yépez, Leider Anibar Tinoco Jaramillo, William Fernando Viera Arroyo. Comparison of fruit quality traits of papaya (Carica papaya L.) genotypes from Shushufindi and La Joya de los Sachas, Ecuador. Ciencia & Tecnología Agropecuaria. 2021; 22 (1):1.

Chicago/Turabian Style

Yadira Beatriz Vargas Tierras; Alejandra Evelyn Díaz Martínez; Carlos Danilo Congo Yépez; Leider Anibar Tinoco Jaramillo; William Fernando Viera Arroyo. 2021. "Comparison of fruit quality traits of papaya (Carica papaya L.) genotypes from Shushufindi and La Joya de los Sachas, Ecuador." Ciencia & Tecnología Agropecuaria 22, no. 1: 1.

Review
Published: 17 August 2020 in Diversity
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Biodiversity is vital for the stability of the planet; its ecosystem services provide essential elements for our survival and well-being. This review analyzes the national biodiversity policies and describes the main strategies for biodiversity conservation in Ecuador, one of the “mega-diverse” countries in the world with the highest species density. It deepens an analysis of in-situ and ex-situ conservation processes. Ecuador has six clear policies for biodiversity conservation. These policies strengthen biodiversity conservation through mechanisms that improve the well-being of wildlife by ensuring human, wildlife and ecosystem health. It promotes actions for the welfare of wildlife, through technical, administrative and legal tools. The National System of Protected Areas, with 60 protected areas, is the most effective in-situ conservation instrument at the country level. Several ex-situ conservation and management means for the conservation of wild species are being utilized, including nurseries, botanical gardens, zoos, germplasm banks, aquariums, species reproduction and rehabilitation centers. Ecuador is making slow progress on ex-situ conservation despite the availability of a sound policy framework, possibly due to financial, infrastructural, and/or technological challenges, and knowledge gaps. We propose fostering international research collaborations and establishing fully funded small-scale captive breeding programs at zoos, aquariums and university research facilities to help recovery of at-risk species of reptiles, amphibians, fish and species beyond Galapagos region. We recommend utilizing citizen science programs to fill the gaps of biodiversity information and increasing efforts to revive the ex-situ conservation strategies in protecting the unique biodiversity of Ecuador.

ACS Style

Carlos Mestanza-Ramón; Sujan M. Henkanaththegedara; Paola Vásconez Duchicela; Yadira Vargas Tierras; Maritza Sánchez Capa; Diana Constante Mejía; Mirian Jimenez Gutierrez; Manuel Charco Guamán; Paúl Mestanza Ramón. In-Situ and Ex-Situ Biodiversity Conservation in Ecuador: A Review of Policies, Actions and Challenges. Diversity 2020, 12, 315 .

AMA Style

Carlos Mestanza-Ramón, Sujan M. Henkanaththegedara, Paola Vásconez Duchicela, Yadira Vargas Tierras, Maritza Sánchez Capa, Diana Constante Mejía, Mirian Jimenez Gutierrez, Manuel Charco Guamán, Paúl Mestanza Ramón. In-Situ and Ex-Situ Biodiversity Conservation in Ecuador: A Review of Policies, Actions and Challenges. Diversity. 2020; 12 (8):315.

Chicago/Turabian Style

Carlos Mestanza-Ramón; Sujan M. Henkanaththegedara; Paola Vásconez Duchicela; Yadira Vargas Tierras; Maritza Sánchez Capa; Diana Constante Mejía; Mirian Jimenez Gutierrez; Manuel Charco Guamán; Paúl Mestanza Ramón. 2020. "In-Situ and Ex-Situ Biodiversity Conservation in Ecuador: A Review of Policies, Actions and Challenges." Diversity 12, no. 8: 315.

Journal article
Published: 22 August 2018 in Ciencia & Tecnología Agropecuaria
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Los frutales en la región norte de la Amazonía se encuentran como parte de la diversidad de cultivos en las chakras de los productores. El objetivo del presente estudio fue caracterizar los frutales amazónicos presentes en las fincas productoras de cacao, café y sistemas silvopastoriles ubicadas en las provincias de Orellana y Sucumbíos La información se obtuvo en base a encuestas dirigidas y mediante observación directa en el campo. Los resultados indicaron que en las dos provincias, los productores establecen de 1 a 19 especies de frutales en sus parcelas, siendo las fincas de menos de 10 hectáreas las más diversas. En la mayoría de fincas, los frutales predominantes en los sistemas de producción son cítricos, coco, guaba, aguacate, papaya, piña y chonta. Estos cultivos se encuentran en asocio con café, cacao, sistemas silvopastoriles; monocultivos; o dispersos fuera de estos sistemas. Por otro lado, se han introducido especies que son consideradas como frutales con potencial de mercado, entre ellos se encontraron la grosella, higo, pomelo, mango y maracuyá. La producción de los frutales está destinada en su mayoría para autoconsumo y alimentación de los animales de la finca; sin embargo el excedente se vende para generar un ingreso económico.

ACS Style

Yadira Beatriz Vargas Tierras; Julia Karina Prado-Beltrán; José Rogelio Nicolalde-Cruz; Fernando Casanoves; Elias De Melo Virginio-Filho; William Fernando Viera Arroyo. Caracterización y rol de los frutales amazónicos en fincas familiares en las provincias de Sucumbíos y Orellana (Ecuador). Ciencia & Tecnología Agropecuaria 2018, 19, 1 .

AMA Style

Yadira Beatriz Vargas Tierras, Julia Karina Prado-Beltrán, José Rogelio Nicolalde-Cruz, Fernando Casanoves, Elias De Melo Virginio-Filho, William Fernando Viera Arroyo. Caracterización y rol de los frutales amazónicos en fincas familiares en las provincias de Sucumbíos y Orellana (Ecuador). Ciencia & Tecnología Agropecuaria. 2018; 19 (3):1.

Chicago/Turabian Style

Yadira Beatriz Vargas Tierras; Julia Karina Prado-Beltrán; José Rogelio Nicolalde-Cruz; Fernando Casanoves; Elias De Melo Virginio-Filho; William Fernando Viera Arroyo. 2018. "Caracterización y rol de los frutales amazónicos en fincas familiares en las provincias de Sucumbíos y Orellana (Ecuador)." Ciencia & Tecnología Agropecuaria 19, no. 3: 1.