1,721,017 research outputs found
Productive and physiological parameters of traditional and native fruit trees for family farming
Full text linkFil: Gariglio, Norberto Francisco. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; Argentina.Este proyecto pretende mejorar el conocimiento sobre las respuestas fisiológicas de los cultivos frutales ante la aplicación de diferentes técnicas agronómicas de modo de adaptar dichas prácticas a las condiciones agroecológicas de la región central de Santa Fe y para producciones a pequeña escala. En el caso de los cítricos del grupo "Navel", se investigarán los cambios en los mecanismos metabólicos y fisiológicos ante técnicas agronómicas que mejoran el cuajado de los frutos tales como la fertilización nitrogenada, la aplicación de giberelinas y el rayado de ramas. En durazneros y ciruelos de bajos requerimientos de frío, se evaluarán los componentes del rendimiento de nuevos cultivares de modo de disponer de genotipos de mejor adaptación y/o calidad de frutos. En higuera, se evaluarán las respuestas fisiológicas y productivas de dos cultivares ante tres sistemas de poda. Para frutos nativos, se caracterizará el comportamiento fenológico-reproductivo y la calidad de la fruta del Ñangapirí y del Mamón del monte.The objective of this project is to improve the knowledge about the physiological responses of different fruit tree crops to the application of some agronomic techniques in order to improve the adjustment of these practices to the agroecological conditions of the central area of Santa Fe and for small scale farms. In the case of citrus of the "Navel" group, physiological and metabolic change of the plant will be investigated in response to techniques that improve fruit set, such as spring nitrogen fertilization, and gibberellin and girdling treatments. In the case of low-chill peaches and plums the yield components of new cultivars will be evaluated in order to dispose genotypes with better adaptation and/or fruit quality. In the case of the fig crop, the physiological and productive responses of two cultivars to three pruning systems will be evaluated. For native fruits, the tree's phenological and reproductive behaviour and the fruit quality of Eugenia uniflora and Vasconcellea quercifolia will be characterized
Sweet corn (Zea mays L.) growth and yield are influenced by establishment methods
Full text linkSix experiments were performed in the term of three years in order to explore and compare the effects of transplanting and direct sowing (DS) on sweet corn (Zea mays L.) growth, earliness and yield. Different genotypes, tray cell sizes (volume) and seedling ages were assayed. In all experiments, direct sowing was performed with a final separation of 0.25 m between plants in each row. Growth parameters (height, leaf area and ear size) were reduced with the increase of age and/or decrease of the tray cell size, mainly in cultivars with early flowering i.e., low cumulative corn heat unit (CHU) requirements. Earlier harvests were obtained in transplanting compared to direct sowing, although with lower yields. When the thermal time accumulated by plants in the trays was higher than 100 CHU, the yield decreased by 3.91% (R2 = 0.79) for each unit of CHU. The results indicate that the transplanted sweet corn yield was generally lower than of direct seeded plants, and differences grew bigger as the tray cell volume was smaller and the seedlings age increased.Fil: Céccoli, Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; ArgentinaFil: Ortega, Leandro Ismael. Instituto Nacional de Tecnologia Agropecuaria. Centro Nacional de Investigaciones Agropecuarias. Centro de Investigaciones Agropecuarias. Instituto de Fisiología y Recursos Geneticos Vegetales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Gariglio, Norberto Francisco. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; ArgentinaFil: Favaro, Juan Carlos. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; ArgentinaFil: Bouzo, Carlos Alberto. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; Argentin
Agronomic Characterization of the "Trompito INTA" Persian Walnut Cultivar
Full text link‘Trompito INTA’ is a walnut cultivar of Argentine origin, developed at the Catamarca Experimental Station of the Instituto Nacional de Tecnología Agropecuaria (INTA). It was produced in 1984 by controlled pollination between the Persian walnut cultivars ‘Lompoc’ x ‘UC 56–224’. It has a very early to early sprouting and flowering, and it is protandrous with 30–70% overlap between pollen shedding and pistillate flower receptivity. Its harvesting occurs 28 days earlier than that of ‘Chandler’. The tree has weak vigor, semi-upright growth habit, medium density of branches and lateral fructification. The nut is of very large size (37.12 mm), the shell is thin, the kernel color is very light, and kernel percent is very high (> 53.5%). ‘Trompito INTA’ has early harvesting, high-quality nut and kernel attributes and better agronomic performance than ‘Chandler’, mainly at lower elevations. This cultivar is allowing the expansion of the crop in the province of Catamarca, lowering the limit of altitude for walnut cultivation.Fil: Carabajal, Dante Edgardo. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Catamarca-La Rioja. Estación Experimental Agropecuaria Catamarca; ArgentinaFil: Colica, Juan José. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Catamarca-La Rioja. Estación Experimental Agropecuaria Catamarca; ArgentinaFil: Prataviera, Antonio Gabriel. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Catamarca-La Rioja. Estación Experimental Agropecuaria Catamarca; ArgentinaFil: Delgado, Eber Alexander. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Catamarca-La Rioja. Estación Experimental Agropecuaria Catamarca; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Gariglio, Norberto Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Ciencias Agropecuarias del Litoral. Universidad Nacional del Litoral. Instituto de Ciencias Agropecuarias del Litoral; Argentin
Growth parameters of strawberry plants in biennial production on the Atlantic Coast of Buenos Aires, Argentina
No full textThe aim of this work was to evaluate the differences in growth parameters of one- and two-year-old plants of a day-neutral strawberry Aromas® grown in the Atlantic Coast production area of Buenos Aires, Argentina. Fresh-dug, leafless, bare-rooted plants were planted in the second week of May of the years 2009 and 2010. Two-year-old plants (T2) showed higher total biomass production, fruit yield and precocity. Crown and root yields of T2 plants in October were 49 and 32 times higher, respectively, and leaf area of T2 plants was three times larger than leaf area of one-year-old plants. T2 plants yielded a higher proportion of crowns and roots, and a lower proportion of dry matter partitioning into leaves. Fruits were the strongest photoassimilates sink (65% to 72% of dry weight accumulation), followed by leaves (13% to 20%), crowns (6% to 10%), roots (2% to 7%), and inflorescences (3% to 4%). Individual fruit weight from T2 plants was lighter than fruit weight of one-year-old plants, and this difference was observed principally from October to December, when T2 plants carried a high fruit load. T2 plants showed a decline in all measured growth parameters from February onwards, associated with crown and root diseases.Fil: Adlercreutz, E. G.. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Buenos Aires Sur. Estación Experimental Agropecuaria Balcarce. Agencia de Extensión Rural Mar del Plata; ArgentinaFil: Micheloud, Norma. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; ArgentinaFil: Kirschbaum, Daniel Santiago. Instituto Nacional de Tecnología Agropecuaria. Centro Regional Tucuman-Santiago del Estero. Estación Experimental Agropecuaria Famaillá; ArgentinaFil: Gariglio, Norberto Francisco. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; Argentin
Study of reproductive behaviour in low-chill apples in warmer zones of Argentina
Full text linkThe domesticated apple (Malus × domestica Borkh.) showsabnormalities in its flowering biology when it is growing in mild-winterareas. Hence, the flowering phenology and the mating system (e.g., open-,cross- and self-pollination, apomixis and parthenocarpy) of Caricia, Eva,and Princesa apple cultivars were studied in three consecutive growingseasons. The flowering period ranged between August and October with widevariation between years, especially in relation to the overlapping of thefull-bloom periods. Fruit set by selfing was significant, reaching a meanvalue of 20% with a minimum of 4.5% and a maximum of 43.7%, depending onthe growing season and the cultivar. The self-incompatibility indexshowed significant changes between years in Eva and Princesa but not inCaricia. Fruit and seed set were significantly greater in cross- andopen-pollination treatments than by self-pollination, apomixis orparthenocarpy. Those variables were affected by a growing season ×treatment interaction. The results indicated that Caricia, Eva, andPrincesa apples show partial to full self-incompatibility, dependingstrongly on the growing season. However, better fruit and seed set ratesare obtained by cross-fertilizationFil: Castro, Damian Cesar. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Cerino, María Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; ArgentinaFil: Gariglio, Norberto Francisco. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; ArgentinaFil: Radice, Silvia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Moron. Facultad de Agronomia y Ciencias Agroalimentarias. Laboratorio de Investigaciones En Fisiología Vegetal; Argentin
Imbibition and vigor of chemically scarified Poncirus trifoliata seeds
No full textPoncirus trifoliata is the most important rootstock in citrus production in Argentina. The seeds exhibit slow and uneven germination due to physical dormancy associated with the presence of seed coats. The objectives of this research were to select the most efficient chemical scarification procedures for P. trifoliata seeds, and assess the effects of such procedures on imbibition and vigor. A first experiment was conducted to assess the efficiency of three chemical scarification methods and their effects on seed vigor. Vigor was determined as the germination velocity index (GVI) and mean time to maximum germination (MTMG). A second experiment was conducted to assess seed vigor and the role of seed coats in imbibition, by comparing the most effective chemical scarification method identified in the first experiment to manual removal of both seed coats and no removal of seed coats. Percentage germination, the vigor indices GVI and MTMG, and the conductivity test (CT) were determined. Scarification with sodium hypochlorite showed the best results. The imbibition curve of seeds with both seed coats reflected an exponential weight increase, seeds with only the testa removed had a linear weight increase, whereas fresh weight of seeds with both testa and tegmen removed followed a hyperbolic change. CT indicated that chemically scarified seeds had no significant increase in conductivity compared to
seeds with intact seed coats. Scarification with sodium hypochlorite was the most effective treatment for removing the testa and also improved seed vigor.EEA San PedroFil: Catraro, Marcela Andrea. Universidad Nacional de Rosario. Facultad de Ciencias Agrarias; ArgentinaFil: Poggi, Damián René. Universidad Nacional de Rosario. Facultad de Ciencias Agrarias; ArgentinaFil: Quadrelli, Agustín Ricardo. Universidad Nacional de Rosario. Facultad de Ciencias Agrarias; ArgentinaFil: García, Leonardo Martín. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria San Pedro; ArgentinaFil: Gariglio, Norberto Francisco. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; ArgentinaFil: Flores, Patricia Cecilia. Universidad Nacional de Rosario. Facultad de Ciencias Agrarias; Argentin
Evaluación del efecto de la fertilización distribuida bajo distintas condiciones de manejo de agua, en el cultivo de naranja, CV. – Valencia late (Citrus sinensis L. Osbeck) en Bella Vista, Corrientes.
Full text linkTesis para optar por el título de Magister Scientiae en Riego y Drenaje presentado a la Facultad de Ciencias Agrarias de la Universidad Nacional de Cuyo, en 2013En la producción de naranja los suelos arenosos de baja fertilidad natural y reducida capacidad de retención de agua afectan los rendimientos en los casos en que no se adapte la tecnología de manejo del riego, y de la distribución de los nutrientes acorde a los requerimientos del cultivo. El objetivo del trabajo fue aumentar la productividad de la naranja Valencia Late cultivada sobre suelo franco arcillo-arenoso (Paleudalf psaméntico) en la zona de Bella Vista, Corrientes. Se evaluó el efecto de la distribución del fertilizante bajo dos situaciones hídricas, analizándose su incidencia sobre la fenología, los componentes del rendimiento, y la producción cuali-cuantitativa del cultivo. Se utilizó un diseño experimental en bloques completos al azar con cuatro repeticiones, siendo el factor de análisis la fertilización con dos niveles tanto para la situación de riego suplementario por goteo (SR) como de secano (SS). De este modo quedaron conformados dos ensayos con dos tratamientos cada uno: Ra0 = fertirriego 1 vez por semana, y Ra1 = fertirriego 3 veces por semana, para la condición de riego; Sa0 = fertilización de base, y Sa1 = fertilización fraccionada, para la condición de secano. Los procesos fenológicos se comportaron en forma similar bajo las distintas situaciones evaluadas. La intensidad de floración y el amarre de frutos no mostraron efecto del fraccionamiento de los nutrientes, ni en SR ni en SS. El rendimiento y el número de frutos por planta aumento significativamente por el fraccionamiento de la fertilización, aunque el incremento fue muy grande en SR (+50%) y mucho menor en SS (+10%). Asimismo, el tamaño de los frutos se mejoró notablemente como consecuencia del riego suplementario. Por último, la calidad interna de la fruta no fue afectada por las diferentes estrategias de distribución del fertilizante. Estos resultados permiten afirmar que el fraccionamiento de la fertilización permitió incrementar los rendimientos a través del aumento del número de frutos por planta, mientras que el riego suplementario lo hizo a través de un mayor tamaño de los frutos.In the production of orange the sandy soils of poor fertility and low water holding capacity affect yields where no technology suits irrigation management and distribution of nutrients according to the requirements of the crop. The objective was to increase the productivity of Valencia Late oranges grown on sandy clay loam soil (Paleudalf psaméntico) in the zone of Bella Vista, Corrientes. In
the experiment the effect of the distribution of fertilizer under two water situations, analyzing their impact on phenology, yield components, and qualitative and quantitative production of the crop was evaluated. Experimental design was a
randomized complete block with four replications, to be fertilization a factor of analysis with two levels for both the situation of supplementary irrigation drip (SR) and rainfed (SS). Thus two trials with two treatments each were formed: RA0 = 1
fertigation weekly and Ra1 = fertigation 3 times a week, for the condition of irrigation; Sa0 = basic fertilization, and Sa1 = fertilization fractional, for rainfed condition. The phenological processes evaluated behaved similarly under the different
situations. The intensity of flowering and fruit set showed no effect of fractionation of nutrients, neither SR nor SS. The yield and number of fruits per plant was significantly improved by the fractionation of fertilization, although the increase was much larger in SR (+50%) and much larger in SS (+10%). Also, the size of the fruit was significantly improved as a result of supplementary irrigation. Finally, the internal quality of the fruit was not affected by different fertilizer distribution strategies. These results confirm that fractionation fertilization allowed to increase yields by increasing the number of fruits per plant, while supplementary irrigation made it through to an increased fruit size.EEA Bella Vista, AER Bella VistaFil: Quispe, Ariel Fernando. Instituto Nacional de Tecnología de Agropecuaria (INTA). Estación Experimental Agropecuaria Bella Vista. Agencia de Extensión Rural Bella Vista; Argentin
Incidence and severity of citrus canker on different orange and mandarin cultivars at the central area of santa fe (argentina)
Full text linkCon el objetivo de analizar el comportamiento de diferentes cultivares de naranjo y mandarino respecto a la cancrosis bacteriana en la región central de Santa Fe, se calculó la incidencia y severidad de la enfermedad en hojas de la brotación primaveral, estival y en frutos de la estación de crecimiento 2013/14. Se utilizó un diseño experimental completamente aleatorizado con 10 repeticiones por cultivar. Los datos se analizaron a través del Análisis de la varianza y test de Tukey, utilizando el Programa InfoStat. Además se analizaron los datos meteorológicos de la zona en conjunto con la fenología durante la estación de crecimiento. Los naranjos 'Washington Navel' y 'Lanelate' presentaron el peor comportamiento frente a la cancrosis mientras que los naranjos 'Midknight', 'Delta Seedless', 'Valencia late' y 'Salustiana' se ubicaron en un nivel intermedio. Los frutos del mandarino 'Clemenules' presentaron un muy buen comportamiento, pero sus brotes se vieron severamente afectados. El mandarino 'Okitsu' fue el cultivar más resistenteIn order to analyze the behavior of different orange and mandarin cultivars against citrus bacterial canker in Central Santa Fe, the incidence and severity of the disease were calculated in leaves and fruits of 4 selected branches per tree during spring and summer 2013/14. A complete randomly experimental design with ten replicates per cultivar was used. Data were analyzed using Analysis of variance and means separated by the Tukey's test, through InfoStat Software. Meteorological and phenological data were analyzed in order to explain disease behavior. Between oranges, 'Washington Navel' and 'Lanelate' showed the highest incidence of citrus canker, while 'Midknight', 'Delta Seedless', 'Valencia late' and 'Salustiana' showed intermediate incidence and severity values. The fruits of 'Clemenules' mandarin showed low incidence of canker but their shoots were severely affected. 'Okitsu' mandarin was the most resistant cultivar to citrus cankerFil: Favaro, María Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias. Departamento de Producción Vegetal; ArgentinaFil: Peretti, Rocio Micaela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias. Departamento de Producción Vegetal; ArgentinaFil: Marano, María Rosa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Biología Molecular y Celular de Rosario. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Instituto de Biología Molecular y Celular de Rosario; ArgentinaFil: Gariglio, Norberto Francisco. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias. Departamento de Producción Vegetal; ArgentinaFil: Rista, Luis Mario. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias. Departamento de Producción Vegetal; Argentin
External Fruit Quality and Harvest Time of Low-Chill Peach and Nectarine Varieties at Santa Fe, Argentina
Full text linkBackground: We studied low chilling peach varieties recently introduced at the central area of Santa Fe, Argentina, to increase the range of options available to growers of warm-temperate areas. Objective: The aim of this study was to evaluate the external fruit quality and the harvest time of different low-chill peach and nectarine varieties in central Argentina.
Results: The harvest period began on the last week of October and extended continuously until the end of December. Although the different varieties ripened in an adequate sequence throughout the season, the second week of November was a critical period in which six varieties reached maturity simultaneously. On the other hand, only a limited number of varieties ripened during the second and fourth weeks of December. Fruit size of peach but not of nectarine showed a positive and significant relationship with the length of the fruit development period. Three peach varieties (‘Flordastar’, ‘Rojo dos’ and ‘San Pedro 1633’) and four nectarines (‘Sunwright’, ‘Nectarine 24’, ‘Carolina’, and ‘Brasil’) produced small fruits (<100 g), which can affect their marketing. Red over-color on the skin was deficient, since only seven varieties developed 50% of red cover.
Conclusion: The new varieties tested are suitable for extending the harvest period at the central area of Santa Fe, and will increase the range of options available to growers. However, before recommending its use, internal quality and fruit yield of these varieties should be evaluated for more years.Fil: Giovanelli, Carolina. Università di Padova; ItaliaFil: Bouzo, Carlos Alberto. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; ArgentinaFil: Ribero, Gustavo Gabriel. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; ArgentinaFil: Castro, Damian Cesar. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; ArgentinaFil: Micheloud, Norma. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; ArgentinaFil: Gariglio, Norberto Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe; Argentina. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias; Argentin
Evaluación de diferentes residuos de la industria como componentes de sustratos para la producción de plantas cítricas bajo cobertura plástica
No full textTesis para optar al título de Magíster Scientiae en Cultivos Intensivos, de la Universidad Nacional del Litoral, en 2021.Debido a la aparición en Argentina de la enfermedad del Huanglongbing en el año 2012, se promulgó la ley 26.888, Res. 165-2013-SENASA que establece que se deben producir las plantas cítricas bajo cubierta plástica y mallas antiáfidos, lo que cambio la forma de producción en los viveros cítricos, hacia la obtención de plantas en macetas bajo cobertura plástica. Esto presenta como limitante, la necesidad de identificar sustratos adecuados, que reúnan las características físicas, químicas, biológicas y de disponibilidad regional para la producción eficiente de plantas. Entre los subproductos para la formulación de sustratos para plantas cítricas en maceta en la zona de Bella Vista, provincia de Corrientes (Argentina), se destacan la cascarilla de arroz y el aserrín, como alternativa al suelo actualmente utilizado. El objetivo de este trabajo fue evaluar el crecimiento y desarrollo de plantas de lima Rangpur (Citrus limonia Osbeck), utilizando diferentes combinaciones de aserrín de eucaliptos y cascarilla de arroz estacionados. Se estudiaron 5 mezclas de sustrato como tratamientos: (T1) sustrato comercial growmix como testigo, (T2) suelo + cascarilla de arroz también testigo (80-20% v/v), (T3) aserrín + cascarilla de arroz (75-25 % v/v), (T4) aserrín + cascarilla de arroz (50-50% v/v), y (T5) aserrín + cascarilla de arroz (25-75% v/v). El tratamiento T3 presentó valores muy alentadores en los parámetros evaluados; en cuanto a características físicas, además de un 91,33% de espacio poroso total, 50,33% de poros con aire y 41,33% de capacidad de retención de humedad, siendo estos valores muy similares al sustrato comercial (T1), el cual presentó 90,00% de espacio poroso total, 33,00% de poros con aire, y 59,00% de capacidad de retención de humedad. En cuanto a las propiedades químicas, el tratamiento T3 presentó 3,68 ds.m-1 de conductividad eléctrica y 4,94 de pH, siendo estos valores aproximados a los del tratamiento testigo T1 (3,83 ds.m-1 y 4,12, respectivamente). Considerando los parámetros de crecimiento y desarrollo, se pudo observar que T3 presentó mayor altura de planta (69,80 cm), alcanzando el diámetro para injerto (3,44 mm) y el mayor número de hojas por planta (23,2) a los 129 días. La mezcla más usada en la actualidad por los viveros de la zona, T2 (tierra y cascarilla 80-20% v/v), mostró los peores parámetros y el menor crecimiento de planta en todas las variables analizadas. En conclusión, la mezcla T3 (75% aserrín y 25% cascarilla v/v) puede ser utilizado para la producción de plantas en macetas. Las mezclas T4 y T5 deberán ser evaluadas nuevamente luego de ser compostadas, complementando así su bajo costo y su amplia disponibilidad.Due to the detection of Huanglongbing disease in Argentina in 2012, Law 26,888, Resolution 165-2013-SENASA of production in citrus nurseries, towards obtaining plants in pots under plastic cover and anti-aphid nets was promulgated. This presents as a limitation, the need to identify adequate substrates, with specific physical, chemical and biological characteristics and regional availability for an efficient production of plants. Among the by-products for the
formulation of substrates for citrus plants in pots in the Bella Vista, province of Corrientes (Argentina), rice husks and sawdust stand out as an alternative to the soil currently used. The objective of this work was to evaluate growth and development of Rangpur lime (Citrus limonia Osbeck) plants, using different combinations of eucalyptus sawdust and rice husk.
Five substrate mixtures were studied as treatments: (T1) 'Grow mix' commercial substrate as control, (T2) soil + rice husk also control (80-20% v/v), (T3) sawdust + rice husk (75-25 % v/v), (T4) sawdust + rice husk (50-50% v/v), and (T5) sawdust + rice husk (25-75% v/v). T3 treatment presented 91.33% of Total Porosity, 50.33% of Aeration Porosity and 41.33% of
moisture Water-holding Capacity, similar to the commercial substrate (T1), which presented 90.00% of total porous space, 33.00% of air pores, and 59.00% of moisture retention capacity. Regarding chemical properties, T3 presented 3.68 ds.m-1 of electrical conductivity and pH 4.94, close related to the control treatment T1 (3.83 ds.m-1 and 4 .12, respectively). Considering growth and development parameters, T3 presented taller plants (69.80 cm) and
the highest number of leaves per plant (23.2), being the first to reach grafting diameter (3.44 mm) at 129 days. Nurseries' most used mixture in Bella Vista, T2 (soil and husk 80-20% v/v), showed the worst physical, chemical and plant growth parameters. In conclusion, T3 can be used for the production of potted plants under greenhouse conditions in Bella Vista. On the other hand, T4 and T5 mixtures could be used after being composted, thus complementing their low cost and wide availability.EEA Bella Vist
- …
