Los tratamientos se establecieron en la estación experimental del Centro Universitario Regional del Litoral Atlántico (CURLA, UNAH), La Ceiba, Atlántida, Honduras, se evaluó la respuesta en rendimiento del cultivo de maíz (Zea mays L.), al sistema de callejones de guama (Inga spp.), con la suplementación de fertilizantes de sulfato de potasio más magnesio (K2SO4 + Mg) en dosis de 0, 20, 40 kg·ha-1 y roca fosfórica (RF) con dosis de 0, 20, 40, 80 kg de RF·ha-1, con cuatro repeticiones por tratamiento. Previo a la siembra se aplicó a razón de 2 ton·ha-1 de cal dolomítica (Ca3(PO4)2CaF2). El aporte de Nitrógeno(N) fue suministrado por el sistema Inga spp. En el año 2014 el mayor rendimiento obtenido en las parcelas de maíz fue significativo, con un rendimiento promedio de 1,645 kg·ha-1, los mejores tratamientos fueron: K2SO4 + Mg y de RF, con la mayor dosis suplementada (20, 40 y 80) kg·ha-1, del mismo año. El alto rendimiento promedio del cultivo durante el primer año, su estabilización durante los dos años siguientes, y las cero aplicaciones de fertilizantes nitrogenados, proporcionaron los indicios de la disponibilidad del Nitrógeno del sistema de siembra en callejones de Inga spp.
<p><strong>Background: </strong>the agronomic yield of crops of importance for rural households in the humid tropics, such as banana, cultivated in association with leguminous trees, such as Inga spp., must be studied because of the little available information on that association, especially with regards to yield response to the application of P and K under agroforestry systems, and the interaction between organic (leguminous residues) and inorganic sources of nutrients. <strong>Objective: </strong>the objective of this study was to evaluate the yield of lady finger banana alley cropped with <em>Inga</em> spp., under several levels of natural fertilizers such as K<sub>2</sub>SO<sub>4</sub> + Mg, and phosphoric rock (RF). <strong>Methodology: </strong>Yield response of lady finger banana (<em>Musa acuminata </em>Colla) under an alley cropping system with guama (<em>Inga</em> spp.). Prior to the establishment of the crop, dolomitic lime (Ca<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub>CaF<sub>2</sub>) at a rate of 2 ton ha<sup>-1</sup> was applied. In addition, phosphoric rock (RF) was added to the crop at diverse levels (0, 20, 40, 80 kg ha<sup>-1</sup>), and potassium sulphate and magnesium (K<sub>2</sub>SO<sub>4</sub> + Mg) at three levels (0, 45, 90 kg ha<sup>-1</sup>) with five replicates in a total of 35 alleys for treatments. <em>Inga</em> spp. trees provided with nitrogen (N). Two crop cycles were evaluated, cycle 1 (2015) and cycle 2 (2017). <strong>Results: </strong>the highest average weight per bunch were obtained with 80 FP and 0 RF in the first cycle, and with 90 K and 45 K in the second cycle, which were significantly higher than other levels. The highest yield on yearly basis was 45 K among the treatments during the first cycle, and the highest yields during the second cycle were obtained with 45 y 90 K<sub>2</sub>SO<sub>4</sub> + Mg. <strong>Implications:</strong> There are no prior studies for lady finger banana crop associated with <em>Inga </em>spp. trees under alley cropping, this reflects that the study is an original contribution to nutrient-response studies under agroforestry system with Inga. <strong>Conclusion:</strong> the highest yields were obtained with 90 and 45 kg ha<sup>-1</sup> of potassium sulphate and magnesium. The application of dolomitic lime promoted P and K availability for the crop, and better use of applied K<sub>2</sub>SO<sub>4</sub> + Mg and of RF in the treatments.</p>
Chitosan (CS) is a natural polymer used in agriculture as a biostimulant that has been evaluated in different plant models. In this study, we evaluated the effect of the foliar application of chitosan–poly(acrylic acid) complexes (CS–PAA) and two nutrient solutions (A and B) on the parameters of growth and yield of two habanero pepper cultivars (Chichen Itza and Jaguar) in a greenhouse. Over the course of the experiment, eight foliar applications were carried out at 15-day intervals. Our results showed that foliar applications of CS–PAA complexes have a biostimulant effect on the habanero pepper crop by increasing the total dry biomass of the plant and the number of fruits of the two cultivars. Regarding nutrient solutions, the nutrient solution A increased the yield of the Chichen Itza cultivar; this effect was because it had a better balance of potassium and calcium compared to the nutrient solution B. These results provide advances on the use of CS–PAA complexes as a biostimulant and the management of nutrient solutions in the crop of habanero peppers.
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